web开发过程中经常用到的一些公共方法及操作

#region 私有方法
        /// <summary>
        /// 过滤特殊字符
        /// </summary>
        private static string String2Json(String s)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.Length; i++)
            {
                char c = s.ToCharArray()[i];
                switch (c)
                {
                    case ‘\"‘:
                        sb.Append("\\\""); break;
                    case ‘\\‘:
                        sb.Append("\\\\"); break;
                    case ‘/‘:
                        sb.Append("\\/"); break;
                    case ‘\b‘:
                        sb.Append("\\b"); break;
                    case ‘\f‘:
                        sb.Append("\\f"); break;
                    case ‘\n‘:
                        sb.Append("\\n"); break;
                    case ‘\r‘:
                        sb.Append("\\r"); break;
                    case ‘\t‘:
                        sb.Append("\\t"); break;
                    default:
                        sb.Append(c); break;
                }
            }
            return sb.ToString();
        }
        
        /// <summary>
        /// 格式化字符型、日期型、布尔型
        /// </summary>
        private static string StringFormat(string str, Type type)
        {
            if (type == typeof(string))
            {
                str = String2Json(str);
                str = "\"" + str + "\"";
            }
            else if (type == typeof(DateTime))
            {
                str = "\"" + str + "\"";
            }
            else if (type == typeof(bool))
            {
                str = str.ToLower();
            }
            else if (type != typeof(string) && string.IsNullOrEmpty(str))
            {
                str = "\"" + str + "\"";
            }
            return str;
        }
        #endregion

        #region List转换成Json
        /// <summary>
        /// List转换成Json
        /// </summary>
        public static string ListToJson<T>(IList<T> list)
        {
            object obj = list[0];
            return ListToJson<T>(list, obj.GetType().Name);
        }

        /// <summary>
        /// List转换成Json 
        /// </summary>
        public static string ListToJson<T>(IList<T> list, string jsonName)
        {
            StringBuilder Json = new StringBuilder();
            if (string.IsNullOrEmpty(jsonName)) jsonName = list[0].GetType().Name;
            Json.Append("{\"" + jsonName + "\":[");
            if (list.Count > 0)
            {
                for (int i = 0; i < list.Count; i++)
                {
                    T obj = Activator.CreateInstance<T>();
                    PropertyInfo[] pi = obj.GetType().GetProperties();
                    Json.Append("{");
                    for (int j = 0; j < pi.Length; j++)
                    {
                        Type type = pi[j].GetValue(list[i], null).GetType();
                        Json.Append("\"" + pi[j].Name.ToString() + "\":" + StringFormat(pi[j].GetValue(list[i], null).ToString(), type));

                        if (j < pi.Length - 1)
                        {
                            Json.Append(",");
                        }
                    }
                    Json.Append("}");
                    if (i < list.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("]}");
            return Json.ToString();
        }
        #endregion

        #region 对象转换为Json
        /// <summary> 
        /// 对象转换为Json 
        /// </summary> 
        /// <param name="jsonObject">对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(object jsonObject)
        {
            string jsonString = "{";
            PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();
            for (int i = 0; i < propertyInfo.Length; i++)
            {
                object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null);
                string value = string.Empty;
                if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan)
                {
                    value = "‘" + objectValue.ToString() + "‘";
                }
                else if (objectValue is string)
                {
                    value = "‘" + ToJson(objectValue.ToString()) + "‘";
                }
                else if (objectValue is IEnumerable)
                {
                    value = ToJson((IEnumerable)objectValue);
                }
                else
                {
                    value = ToJson(objectValue.ToString());
                }
                jsonString += "\"" + ToJson(propertyInfo[i].Name) + "\":" + value + ",";
            }
            jsonString.Remove(jsonString.Length - 1, jsonString.Length);
            return jsonString + "}";
        }
        #endregion

        #region 对象集合转换Json
        /// <summary> 
        /// 对象集合转换Json 
        /// </summary> 
        /// <param name="array">集合对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(IEnumerable array)
        {
            string jsonString = "[";
            foreach (object item in array)
            {
                jsonString += ToJson(item) + ",";
            }
            jsonString.Remove(jsonString.Length - 1, jsonString.Length);
            return jsonString + "]";
        }
        #endregion

        #region 普通集合转换Json
        /// <summary> 
        /// 普通集合转换Json 
        /// </summary> 
        /// <param name="array">集合对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToArrayString(IEnumerable array)
        {
            string jsonString = "[";
            foreach (object item in array)
            {
                jsonString = ToJson(item.ToString()) + ",";
            }
            jsonString.Remove(jsonString.Length - 1, jsonString.Length);
            return jsonString + "]";
        }
        #endregion

        #region  DataSet转换为Json
        /// <summary> 
        /// DataSet转换为Json 
        /// </summary> 
        /// <param name="dataSet">DataSet对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(DataSet dataSet)
        {
            string jsonString = "{";
            foreach (DataTable table in dataSet.Tables)
            {
                jsonString += "\"" + table.TableName + "\":" + ToJson(table) + ",";
            }
            jsonString = jsonString.TrimEnd(‘,‘);
            return jsonString + "}";
        }
        #endregion

        #region Datatable转换为Json
        /// <summary> 
        /// Datatable转换为Json 
        /// </summary> 
        /// <param name="table">Datatable对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(DataTable dt)
        {
            StringBuilder jsonString = new StringBuilder();
            jsonString.Append("[");
            DataRowCollection drc = dt.Rows;
            for (int i = 0; i < drc.Count; i++)
            {
                jsonString.Append("{");
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    string strKey = dt.Columns[j].ColumnName;
                    string strValue = drc[i][j].ToString();
                    Type type = dt.Columns[j].DataType;
                    jsonString.Append("\"" + strKey + "\":");
                    strValue = StringFormat(strValue, type);
                    if (j < dt.Columns.Count - 1)
                    {
                        jsonString.Append(strValue + ",");
                    }
                    else
                    {
                        jsonString.Append(strValue);
                    }
                }
                jsonString.Append("},");
            }
            jsonString.Remove(jsonString.Length - 1, 1);
            jsonString.Append("]");
            return jsonString.ToString();
        }

        /// <summary>
        /// DataTable转换为Json 
        /// </summary>
        public static string ToJson(DataTable dt, string jsonName)
        {
            StringBuilder Json = new StringBuilder();
            if (string.IsNullOrEmpty(jsonName)) jsonName = dt.TableName;
            Json.Append("{\"" + jsonName + "\":[");
            if (dt.Rows.Count > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    Json.Append("{");
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        Type type = dt.Rows[i][j].GetType();
                        Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + StringFormat(dt.Rows[i][j].ToString(), type));
                        if (j < dt.Columns.Count - 1)
                        {
                            Json.Append(",");
                        }
                    }
                    Json.Append("}");
                    if (i < dt.Rows.Count - 1)
                    {
                        Json.Append(",");
                    }
                }
            }
            Json.Append("]}");
            return Json.ToString();
        }
        #endregion

        #region DataReader转换为Json
        /// <summary> 
        /// DataReader转换为Json 
        /// </summary> 
        /// <param name="dataReader">DataReader对象</param> 
        /// <returns>Json字符串</returns> 
        public static string ToJson(DbDataReader dataReader)
        {
            StringBuilder jsonString = new StringBuilder();
            jsonString.Append("[");
            while (dataReader.Read())
            {
                jsonString.Append("{");
                for (int i = 0; i < dataReader.FieldCount; i++)
                {
                    Type type = dataReader.GetFieldType(i);
                    string strKey = dataReader.GetName(i);
                    string strValue = dataReader[i].ToString();
                    jsonString.Append("\"" + strKey + "\":");
                    strValue = StringFormat(strValue, type);
                    if (i < dataReader.FieldCount - 1)
                    {
                        jsonString.Append(strValue + ",");
                    }
                    else
                    {
                        jsonString.Append(strValue);
                    }
                }
                jsonString.Append("},");
            }
            dataReader.Close();
            jsonString.Remove(jsonString.Length - 1, 1);
            jsonString.Append("]");
            return jsonString.ToString();
        }
        #endregion

/// <summary>
    /// Xml的操作公共类
    /// </summary>    
    public class XmlHelper
    {
        #region 字段定义
        /// <summary>
        /// XML文件的物理路径
        /// </summary>
        private string _filePath = string.Empty;
        /// <summary>
        /// Xml文档
        /// </summary>
        private XmlDocument _xml;
        /// <summary>
        /// XML的根节点
        /// </summary>
        private XmlElement _element;
        #endregion

        #region 构造方法
        /// <summary>
        /// 实例化XmlHelper对象
        /// </summary>
        /// <param name="xmlFilePath">Xml文件的相对路径</param>
        public XmlHelper(string xmlFilePath)
        {
            //获取XML文件的绝对路径
            _filePath = SysHelper.GetPath(xmlFilePath);
        }
        #endregion

        #region 创建XML的根节点
        /// <summary>
        /// 创建XML的根节点
        /// </summary>
        private void CreateXMLElement()
        {

            //创建一个XML对象
            _xml = new XmlDocument();

            if (DirFile.IsExistFile(_filePath))
            {
                //加载XML文件
                _xml.Load(this._filePath);
            }

            //为XML的根节点赋值
            _element = _xml.DocumentElement;
        }
        #endregion

        #region 获取指定XPath表达式的节点对象
        /// <summary>
        /// 获取指定XPath表达式的节点对象
        /// </summary>        
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME=‘a‘]" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName=‘岗位编号‘]",@itemName是Item节点的属性.
        /// </param>
        public XmlNode GetNode(string xPath)
        {
            //创建XML的根节点
            CreateXMLElement();

            //返回XPath节点
            return _element.SelectSingleNode(xPath);
        }
        #endregion

        #region 获取指定XPath表达式节点的值
        /// <summary>
        /// 获取指定XPath表达式节点的值
        /// </summary>
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME=‘a‘]" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName=‘岗位编号‘]",@itemName是Item节点的属性.
        /// </param>
        public string GetValue(string xPath)
        {
            //创建XML的根节点
            CreateXMLElement();

            //返回XPath节点的值
            return _element.SelectSingleNode(xPath).InnerText;
        }
        #endregion

        #region 获取指定XPath表达式节点的属性值
        /// <summary>
        /// 获取指定XPath表达式节点的属性值
        /// </summary>
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME=‘a‘]" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName=‘岗位编号‘]",@itemName是Item节点的属性.
        /// </param>
        /// <param name="attributeName">属性名</param>
        public string GetAttributeValue(string xPath, string attributeName)
        {
            //创建XML的根节点
            CreateXMLElement();

            //返回XPath节点的属性值
            return _element.SelectSingleNode(xPath).Attributes[attributeName].Value;
        }
        #endregion

        #region 新增节点
        /// <summary>
        /// 1. 功能：新增节点。
        /// 2. 使用条件：将任意节点插入到当前Xml文件中。
        /// </summary>        
        /// <param name="xmlNode">要插入的Xml节点</param>
        public void AppendNode(XmlNode xmlNode)
        {
            //创建XML的根节点
            CreateXMLElement();

            //导入节点
            XmlNode node = _xml.ImportNode(xmlNode, true);

            //将节点插入到根节点下
            _element.AppendChild(node);
        }

        /// <summary>
        /// 1. 功能：新增节点。
        /// 2. 使用条件：将DataSet中的第一条记录插入Xml文件中。
        /// </summary>        
        /// <param name="ds">DataSet的实例，该DataSet中应该只有一条记录</param>
        public void AppendNode(DataSet ds)
        {
            //创建XmlDataDocument对象
            XmlDataDocument xmlDataDocument = new XmlDataDocument(ds);

            //导入节点
            XmlNode node = xmlDataDocument.DocumentElement.FirstChild;

            //将节点插入到根节点下
            AppendNode(node);
        }
        #endregion

        #region 删除节点
        /// <summary>
        /// 删除指定XPath表达式的节点
        /// </summary>        
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME=‘a‘]" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName=‘岗位编号‘]",@itemName是Item节点的属性.
        /// </param>
        public void RemoveNode(string xPath)
        {
            //创建XML的根节点
            CreateXMLElement();

            //获取要删除的节点
            XmlNode node = _xml.SelectSingleNode(xPath);

            //删除节点
            _element.RemoveChild(node);
        }
        #endregion //删除节点

        #region 保存XML文件
        /// <summary>
        /// 保存XML文件
        /// </summary>        
        public void Save()
        {
            //创建XML的根节点
            CreateXMLElement();

            //保存XML文件
            _xml.Save(this._filePath);
        }
        #endregion //保存XML文件

        #region 静态方法

        #region 创建根节点对象
        /// <summary>
        /// 创建根节点对象
        /// </summary>
        /// <param name="xmlFilePath">Xml文件的相对路径</param>        
        private static XmlElement CreateRootElement(string xmlFilePath)
        {
            //定义变量，表示XML文件的绝对路径
            string filePath = "";

            //获取XML文件的绝对路径
            filePath = SysHelper.GetPath(xmlFilePath);

            //创建XmlDocument对象
            XmlDocument xmlDocument = new XmlDocument();
            //加载XML文件
            xmlDocument.Load(filePath);

            //返回根节点
            return xmlDocument.DocumentElement;
        }
        #endregion

        #region 获取指定XPath表达式节点的值
        /// <summary>
        /// 获取指定XPath表达式节点的值
        /// </summary>
        /// <param name="xmlFilePath">Xml文件的相对路径</param>
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME=‘a‘]" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName=‘岗位编号‘]",@itemName是Item节点的属性.
        /// </param>
        public static string GetValue(string xmlFilePath, string xPath)
        {
            //创建根对象
            XmlElement rootElement = CreateRootElement(xmlFilePath);

            //返回XPath节点的值
            return rootElement.SelectSingleNode(xPath).InnerText;
        }
        #endregion

        #region 获取指定XPath表达式节点的属性值
        /// <summary>
        /// 获取指定XPath表达式节点的属性值
        /// </summary>
        /// <param name="xmlFilePath">Xml文件的相对路径</param>
        /// <param name="xPath">XPath表达式,
        /// 范例1: @"Skill/First/SkillItem", 等效于 @"//Skill/First/SkillItem"
        /// 范例2: @"Table[USERNAME=‘a‘]" , []表示筛选,USERNAME是Table下的一个子节点.
        /// 范例3: @"ApplyPost/Item[@itemName=‘岗位编号‘]",@itemName是Item节点的属性.
        /// </param>
        /// <param name="attributeName">属性名</param>
        public static string GetAttributeValue(string xmlFilePath, string xPath, string attributeName)
        {
            //创建根对象
            XmlElement rootElement = CreateRootElement(xmlFilePath);

            //返回XPath节点的属性值
            return rootElement.SelectSingleNode(xPath).Attributes[attributeName].Value;
        }
        #endregion

        #endregion

        public static void SetValue(string xmlFilePath, string xPath, string newtext)
        {
            //string path = SysHelper.GetPath(xmlFilePath);
            //var queryXML = from xmlLog in xelem.Descendants("msg_log")
            //               //所有名字为Bin的记录
            //               where xmlLog.Element("user").Value == "Bin"
            //               select xmlLog;

            //foreach (XElement el in queryXML)
            //{
            //    el.Element("user").Value = "LiuBin";//开始修改
            //}
            //xelem.Save(path);
        }
    }

public class FileDown
    {
        public FileDown()
        { }

        /// <summary>
        /// 参数为虚拟路径
        /// </summary>
        public static string FileNameExtension(string FileName)
        {
            return Path.GetExtension(MapPathFile(FileName));
        }

        /// <summary>
        /// 获取物理地址
        /// </summary>
        public static string MapPathFile(string FileName)
        {
            return HttpContext.Current.Server.MapPath(FileName);
        }

        /// <summary>
        /// 普通下载
        /// </summary>
        /// <param name="FileName">文件虚拟路径</param>
        public static void DownLoadold(string FileName)
        {
            string destFileName = MapPathFile(FileName);
            if (File.Exists(destFileName))
            {
                FileInfo fi = new FileInfo(destFileName);
                HttpContext.Current.Response.Clear();
                HttpContext.Current.Response.ClearHeaders();
                HttpContext.Current.Response.Buffer = false;
                HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Path.GetFileName(destFileName), System.Text.Encoding.UTF8));
                HttpContext.Current.Response.AppendHeader("Content-Length", fi.Length.ToString());
                HttpContext.Current.Response.ContentType = "application/octet-stream";
                HttpContext.Current.Response.WriteFile(destFileName);
                HttpContext.Current.Response.Flush();
                HttpContext.Current.Response.End();
            }
        }

        /// <summary>
        /// 分块下载
        /// </summary>
        /// <param name="FileName">文件虚拟路径</param>
        public static void DownLoad(string FileName)
        {
            string filePath = MapPathFile(FileName);
            long chunkSize = 204800;             //指定块大小 
            byte[] buffer = new byte[chunkSize]; //建立一个200K的缓冲区 
            long dataToRead = 0;                 //已读的字节数   
            FileStream stream = null;
            try
            {
                //打开文件   
                stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
                dataToRead = stream.Length;

                //添加Http头   
                HttpContext.Current.Response.ContentType = "application/octet-stream";
                HttpContext.Current.Response.AddHeader("Content-Disposition", "attachement;filename=" + HttpUtility.UrlEncode(Path.GetFileName(filePath)));
                HttpContext.Current.Response.AddHeader("Content-Length", dataToRead.ToString());

                while (dataToRead > 0)
                {
                    if (HttpContext.Current.Response.IsClientConnected)
                    {
                        int length = stream.Read(buffer, 0, Convert.ToInt32(chunkSize));
                        HttpContext.Current.Response.OutputStream.Write(buffer, 0, length);
                        HttpContext.Current.Response.Flush();
                        HttpContext.Current.Response.Clear();
                        dataToRead -= length;
                    }
                    else
                    {
                        dataToRead = -1; //防止client失去连接 
                    }
                }
            }
            catch (Exception ex)
            {
                HttpContext.Current.Response.Write("Error:" + ex.Message);
            }
            finally
            {
                if (stream != null) stream.Close();
                HttpContext.Current.Response.Close();
            }
        }

        /// <summary>
        ///  输出硬盘文件，提供下载 支持大文件、续传、速度限制、资源占用小
        /// </summary>
        /// <param name="_Request">Page.Request对象</param>
        /// <param name="_Response">Page.Response对象</param>
        /// <param name="_fileName">下载文件名</param>
        /// <param name="_fullPath">带文件名下载路径</param>
        /// <param name="_speed">每秒允许下载的字节数</param>
        /// <returns>返回是否成功</returns>
        //---------------------------------------------------------------------
        //调用：
        // string FullPath=Server.MapPath("count.txt");
        // ResponseFile(this.Request,this.Response,"count.txt",FullPath,100);
        //---------------------------------------------------------------------
        public static bool ResponseFile(HttpRequest _Request, HttpResponse _Response, string _fileName, string _fullPath, long _speed)
        {
            try
            {
                FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                BinaryReader br = new BinaryReader(myFile);
                try
                {
                    _Response.AddHeader("Accept-Ranges", "bytes");
                    _Response.Buffer = false;

                    long fileLength = myFile.Length;
                    long startBytes = 0;
                    int pack = 10240;  //10K bytes
                    int sleep = (int)Math.Floor((double)(1000 * pack / _speed)) + 1;

                    if (_Request.Headers["Range"] != null)
                    {
                        _Response.StatusCode = 206;
                        string[] range = _Request.Headers["Range"].Split(new char[] { ‘=‘, ‘-‘ });
                        startBytes = Convert.ToInt64(range[1]);
                    }
                    _Response.AddHeader("Content-Length", (fileLength - startBytes).ToString());
                    if (startBytes != 0)
                    {
                        _Response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength - 1, fileLength));
                    }

                    _Response.AddHeader("Connection", "Keep-Alive");
                    _Response.ContentType = "application/octet-stream";
                    _Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(_fileName, System.Text.Encoding.UTF8));

                    br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
                    int maxCount = (int)Math.Floor((double)((fileLength - startBytes) / pack)) + 1;

                    for (int i = 0; i < maxCount; i++)
                    {
                        if (_Response.IsClientConnected)
                        {
                            _Response.BinaryWrite(br.ReadBytes(pack));
                            Thread.Sleep(sleep);
                        }
                        else
                        {
                            i = maxCount;
                        }
                    }
                }
                catch
                {
                    return false;
                }
                finally
                {
                    br.Close();
                    myFile.Close();
                }
            }
            catch
            {
                return false;
            }
            return true;
        }
    }

public class FileDown
    {
        public FileDown()
        { }

        /// <summary>
        /// 参数为虚拟路径
        /// </summary>
        public static string FileNameExtension(string FileName)
        {
            return Path.GetExtension(MapPathFile(FileName));
        }

        /// <summary>
        /// 获取物理地址
        /// </summary>
        public static string MapPathFile(string FileName)
        {
            return HttpContext.Current.Server.MapPath(FileName);
        }

        /// <summary>
        /// 普通下载
        /// </summary>
        /// <param name="FileName">文件虚拟路径</param>
        public static void DownLoadold(string FileName)
        {
            string destFileName = MapPathFile(FileName);
            if (File.Exists(destFileName))
            {
                FileInfo fi = new FileInfo(destFileName);
                HttpContext.Current.Response.Clear();
                HttpContext.Current.Response.ClearHeaders();
                HttpContext.Current.Response.Buffer = false;
                HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Path.GetFileName(destFileName), System.Text.Encoding.UTF8));
                HttpContext.Current.Response.AppendHeader("Content-Length", fi.Length.ToString());
                HttpContext.Current.Response.ContentType = "application/octet-stream";
                HttpContext.Current.Response.WriteFile(destFileName);
                HttpContext.Current.Response.Flush();
                HttpContext.Current.Response.End();
            }
        }

        /// <summary>
        /// 分块下载
        /// </summary>
        /// <param name="FileName">文件虚拟路径</param>
        public static void DownLoad(string FileName)
        {
            string filePath = MapPathFile(FileName);
            long chunkSize = 204800;             //指定块大小 
            byte[] buffer = new byte[chunkSize]; //建立一个200K的缓冲区 
            long dataToRead = 0;                 //已读的字节数   
            FileStream stream = null;
            try
            {
                //打开文件   
                stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
                dataToRead = stream.Length;

                //添加Http头   
                HttpContext.Current.Response.ContentType = "application/octet-stream";
                HttpContext.Current.Response.AddHeader("Content-Disposition", "attachement;filename=" + HttpUtility.UrlEncode(Path.GetFileName(filePath)));
                HttpContext.Current.Response.AddHeader("Content-Length", dataToRead.ToString());

                while (dataToRead > 0)
                {
                    if (HttpContext.Current.Response.IsClientConnected)
                    {
                        int length = stream.Read(buffer, 0, Convert.ToInt32(chunkSize));
                        HttpContext.Current.Response.OutputStream.Write(buffer, 0, length);
                        HttpContext.Current.Response.Flush();
                        HttpContext.Current.Response.Clear();
                        dataToRead -= length;
                    }
                    else
                    {
                        dataToRead = -1; //防止client失去连接 
                    }
                }
            }
            catch (Exception ex)
            {
                HttpContext.Current.Response.Write("Error:" + ex.Message);
            }
            finally
            {
                if (stream != null) stream.Close();
                HttpContext.Current.Response.Close();
            }
        }

        /// <summary>
        ///  输出硬盘文件，提供下载 支持大文件、续传、速度限制、资源占用小
        /// </summary>
        /// <param name="_Request">Page.Request对象</param>
        /// <param name="_Response">Page.Response对象</param>
        /// <param name="_fileName">下载文件名</param>
        /// <param name="_fullPath">带文件名下载路径</param>
        /// <param name="_speed">每秒允许下载的字节数</param>
        /// <returns>返回是否成功</returns>
        //---------------------------------------------------------------------
        //调用：
        // string FullPath=Server.MapPath("count.txt");
        // ResponseFile(this.Request,this.Response,"count.txt",FullPath,100);
        //---------------------------------------------------------------------
        public static bool ResponseFile(HttpRequest _Request, HttpResponse _Response, string _fileName, string _fullPath, long _speed)
        {
            try
            {
                FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                BinaryReader br = new BinaryReader(myFile);
                try
                {
                    _Response.AddHeader("Accept-Ranges", "bytes");
                    _Response.Buffer = false;

                    long fileLength = myFile.Length;
                    long startBytes = 0;
                    int pack = 10240;  //10K bytes
                    int sleep = (int)Math.Floor((double)(1000 * pack / _speed)) + 1;

                    if (_Request.Headers["Range"] != null)
                    {
                        _Response.StatusCode = 206;
                        string[] range = _Request.Headers["Range"].Split(new char[] { ‘=‘, ‘-‘ });
                        startBytes = Convert.ToInt64(range[1]);
                    }
                    _Response.AddHeader("Content-Length", (fileLength - startBytes).ToString());
                    if (startBytes != 0)
                    {
                        _Response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength - 1, fileLength));
                    }

                    _Response.AddHeader("Connection", "Keep-Alive");
                    _Response.ContentType = "application/octet-stream";
                    _Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(_fileName, System.Text.Encoding.UTF8));

                    br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
                    int maxCount = (int)Math.Floor((double)((fileLength - startBytes) / pack)) + 1;

                    for (int i = 0; i < maxCount; i++)
                    {
                        if (_Response.IsClientConnected)
                        {
                            _Response.BinaryWrite(br.ReadBytes(pack));
                            Thread.Sleep(sleep);
                        }
                        else
                        {
                            i = maxCount;
                        }
                    }
                }
                catch
                {
                    return false;
                }
                finally
                {
                    br.Close();
                    myFile.Close();
                }
            }
            catch
            {
                return false;
            }
            return true;
        }
    }

public class DownLoadHelper
    {
        #region ResponseFile 输出硬盘文件，提供下载 支持大文件、续传、速度限制、资源占用小
        /// <summary>
        ///  输出硬盘文件，提供下载 支持大文件、续传、速度限制、资源占用小
        /// </summary>
        /// <param name="_Request">Page.Request对象</param>
        /// <param name="_Response">Page.Response对象</param>
        /// <param name="_fileName">下载文件名</param>
        /// <param name="_fullPath">带文件名下载路径</param>
        /// <param name="_speed">每秒允许下载的字节数</param>
        /// <returns>返回是否成功</returns>
        public static bool ResponseFile(HttpRequest _Request, HttpResponse _Response, string _fileName, string _fullPath, long _speed)
        {
            try
            {
                FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                BinaryReader br = new BinaryReader(myFile);
                try
                {
                    _Response.AddHeader("Accept-Ranges", "bytes");
                    _Response.Buffer = false;
                    long fileLength = myFile.Length;
                    long startBytes = 0;

                    int pack = 10240; //10K bytes
                    //int sleep = 200;   //每秒5次   即5*10K bytes每秒
                    int sleep = (int)Math.Floor((double)(1000 * pack / _speed)) + 1;
                    if (_Request.Headers["Range"] != null)
                    {
                        _Response.StatusCode = 206;
                        string[] range = _Request.Headers["Range"].Split(new char[] { ‘=‘, ‘-‘ });
                        startBytes = Convert.ToInt64(range[1]);
                    }
                    _Response.AddHeader("Content-Length", (fileLength - startBytes).ToString());
                    if (startBytes != 0)
                    {
                        _Response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength - 1, fileLength));
                    }
                    _Response.AddHeader("Connection", "Keep-Alive");
                    _Response.ContentType = "application/octet-stream";
                    _Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(_fileName, System.Text.Encoding.UTF8));

                    br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
                    int maxCount = (int)Math.Floor((double)((fileLength - startBytes) / pack)) + 1;

                    for (int i = 0; i < maxCount; i++)
                    {
                        if (_Response.IsClientConnected)
                        {
                            _Response.BinaryWrite(br.ReadBytes(pack));
                            Thread.Sleep(sleep);
                        }
                        else
                        {
                            i = maxCount;
                        }
                    }
                }
                catch
                {
                    return false;
                }
                finally
                {
                    br.Close();
                    myFile.Close();
                }
            }
            catch
            {
                return false;
            }
            return true;
        }
        #endregion
    }

public class DownLoadHelper
    {
        #region ResponseFile 输出硬盘文件，提供下载 支持大文件、续传、速度限制、资源占用小
        /// <summary>
        ///  输出硬盘文件，提供下载 支持大文件、续传、速度限制、资源占用小
        /// </summary>
        /// <param name="_Request">Page.Request对象</param>
        /// <param name="_Response">Page.Response对象</param>
        /// <param name="_fileName">下载文件名</param>
        /// <param name="_fullPath">带文件名下载路径</param>
        /// <param name="_speed">每秒允许下载的字节数</param>
        /// <returns>返回是否成功</returns>
        public static bool ResponseFile(HttpRequest _Request, HttpResponse _Response, string _fileName, string _fullPath, long _speed)
        {
            try
            {
                FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                BinaryReader br = new BinaryReader(myFile);
                try
                {
                    _Response.AddHeader("Accept-Ranges", "bytes");
                    _Response.Buffer = false;
                    long fileLength = myFile.Length;
                    long startBytes = 0;

                    int pack = 10240; //10K bytes
                    //int sleep = 200;   //每秒5次   即5*10K bytes每秒
                    int sleep = (int)Math.Floor((double)(1000 * pack / _speed)) + 1;
                    if (_Request.Headers["Range"] != null)
                    {
                        _Response.StatusCode = 206;
                        string[] range = _Request.Headers["Range"].Split(new char[] { ‘=‘, ‘-‘ });
                        startBytes = Convert.ToInt64(range[1]);
                    }
                    _Response.AddHeader("Content-Length", (fileLength - startBytes).ToString());
                    if (startBytes != 0)
                    {
                        _Response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength - 1, fileLength));
                    }
                    _Response.AddHeader("Connection", "Keep-Alive");
                    _Response.ContentType = "application/octet-stream";
                    _Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(_fileName, System.Text.Encoding.UTF8));

                    br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
                    int maxCount = (int)Math.Floor((double)((fileLength - startBytes) / pack)) + 1;

                    for (int i = 0; i < maxCount; i++)
                    {
                        if (_Response.IsClientConnected)
                        {
                            _Response.BinaryWrite(br.ReadBytes(pack));
                            Thread.Sleep(sleep);
                        }
                        else
                        {
                            i = maxCount;
                        }
                    }
                }
                catch
                {
                    return false;
                }
                finally
                {
                    br.Close();
                    myFile.Close();
                }
            }
            catch
            {
                return false;
            }
            return true;
        }
        #endregion
    }

/// <summary>
    /// 字符串操作类
    /// 1、GetStrArray(string str, char speater, bool toLower)  把字符串按照分隔符转换成 List
    /// 2、GetStrArray(string str) 把字符串转 按照, 分割 换为数据
    /// 3、GetArrayStr(List list, string speater) 把 List 按照分隔符组装成 string
    /// 4、GetArrayStr(List list)  得到数组列表以逗号分隔的字符串
    /// 5、GetArrayValueStr(Dictionary<int, int> list)得到数组列表以逗号分隔的字符串
    /// 6、DelLastComma(string str)删除最后结尾的一个逗号
    /// 7、DelLastChar(string str, string strchar)删除最后结尾的指定字符后的字符
    /// 8、ToSBC(string input)转全角的函数(SBC case)
    /// 9、ToDBC(string input)转半角的函数(SBC case)
    /// 10、GetSubStringList(string o_str, char sepeater)把字符串按照指定分隔符装成 List 去除重复
    /// 11、GetCleanStyle(string StrList, string SplitString)将字符串样式转换为纯字符串
    /// 12、GetNewStyle(string StrList, string NewStyle, string SplitString, out string Error)将字符串转换为新样式
    /// 13、SplitMulti(string str, string splitstr)分割字符串
    /// 14、SqlSafeString(string String, bool IsDel)
    /// </summary>
    public class StringHelper
    {
        /// <summary>
        /// 把字符串按照分隔符转换成 List
        /// </summary>
        /// <param name="str">源字符串</param>
        /// <param name="speater">分隔符</param>
        /// <param name="toLower">是否转换为小写</param>
        /// <returns></returns>
        public static List<string> GetStrArray(string str, char speater, bool toLower)
        {
            List<string> list = new List<string>();
            string[] ss = str.Split(speater);
            foreach (string s in ss)
            {
                if (!string.IsNullOrEmpty(s) && s != speater.ToString())
                {
                    string strVal = s;
                    if (toLower)
                    {
                        strVal = s.ToLower();
                    }
                    list.Add(strVal);
                }
            }
            return list;
        }
        /// <summary>
        /// 把字符串转 按照, 分割 换为数据
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string[] GetStrArray(string str)
        {
            return str.Split(new Char[] { ‘,‘ });
        }
        /// <summary>
        /// 把 List<string> 按照分隔符组装成 string
        /// </summary>
        /// <param name="list"></param>
        /// <param name="speater"></param>
        /// <returns></returns>
        public static string GetArrayStr(List<string> list, string speater)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < list.Count; i++)
            {
                if (i == list.Count - 1)
                {
                    sb.Append(list[i]);
                }
                else
                {
                    sb.Append(list[i]);
                    sb.Append(speater);
                }
            }
            return sb.ToString();
        }
        /// <summary>
        /// 得到数组列表以逗号分隔的字符串
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static string GetArrayStr(List<int> list)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < list.Count; i++)
            {
                if (i == list.Count - 1)
                {
                    sb.Append(list[i].ToString());
                }
                else
                {
                    sb.Append(list[i]);
                    sb.Append(",");
                }
            }
            return sb.ToString();
        }
        /// <summary>
        /// 得到数组列表以逗号分隔的字符串
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static string GetArrayValueStr(Dictionary<int, int> list)
        {
            StringBuilder sb = new StringBuilder();
            foreach (KeyValuePair<int, int> kvp in list)
            {
                sb.Append(kvp.Value + ",");
            }
            if (list.Count > 0)
            {
                return DelLastComma(sb.ToString());
            }
            else
            {
                return "";
            }
        }


        #region 删除最后一个字符之后的字符

        /// <summary>
        /// 删除最后结尾的一个逗号
        /// </summary>
        public static string DelLastComma(string str)
        {
            return str.Substring(0, str.LastIndexOf(","));
        }

        /// <summary>
        /// 删除最后结尾的指定字符后的字符
        /// </summary>
        public static string DelLastChar(string str, string strchar)
        {
            return str.Substring(0, str.LastIndexOf(strchar));
        }

        #endregion




        /// <summary>
        /// 转全角的函数(SBC case)
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string ToSBC(string input)
        {
            //半角转全角：
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 32)
                {
                    c[i] = (char)12288;
                    continue;
                }
                if (c[i] < 127)
                    c[i] = (char)(c[i] + 65248);
            }
            return new string(c);
        }

        /// <summary>
        ///  转半角的函数(SBC case)
        /// </summary>
        /// <param name="input">输入</param>
        /// <returns></returns>
        public static string ToDBC(string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 12288)
                {
                    c[i] = (char)32;
                    continue;
                }
                if (c[i] > 65280 && c[i] < 65375)
                    c[i] = (char)(c[i] - 65248);
            }
            return new string(c);
        }

        /// <summary>
        /// 把字符串按照指定分隔符装成 List 去除重复
        /// </summary>
        /// <param name="o_str"></param>
        /// <param name="sepeater"></param>
        /// <returns></returns>
        public static List<string> GetSubStringList(string o_str, char sepeater)
        {
            List<string> list = new List<string>();
            string[] ss = o_str.Split(sepeater);
            foreach (string s in ss)
            {
                if (!string.IsNullOrEmpty(s) && s != sepeater.ToString())
                {
                    list.Add(s);
                }
            }
            return list;
        }


        #region 将字符串样式转换为纯字符串
        /// <summary>
        ///  将字符串样式转换为纯字符串
        /// </summary>
        /// <param name="StrList"></param>
        /// <param name="SplitString"></param>
        /// <returns></returns>
        public static string GetCleanStyle(string StrList, string SplitString)
        {
            string RetrunValue = "";
            //如果为空，返回空值
            if (StrList == null)
            {
                RetrunValue = "";
            }
            else
            {
                //返回去掉分隔符
                string NewString = "";
                NewString = StrList.Replace(SplitString, "");
                RetrunValue = NewString;
            }
            return RetrunValue;
        }
        #endregion

        #region 将字符串转换为新样式
        /// <summary>
        /// 将字符串转换为新样式
        /// </summary>
        /// <param name="StrList"></param>
        /// <param name="NewStyle"></param>
        /// <param name="SplitString"></param>
        /// <param name="Error"></param>
        /// <returns></returns>
        public static string GetNewStyle(string StrList, string NewStyle, string SplitString, out string Error)
        {
            string ReturnValue = "";
            //如果输入空值，返回空，并给出错误提示
            if (StrList == null)
            {
                ReturnValue = "";
                Error = "请输入需要划分格式的字符串";
            }
            else
            {
                //检查传入的字符串长度和样式是否匹配,如果不匹配，则说明使用错误。给出错误信息并返回空值
                int strListLength = StrList.Length;
                int NewStyleLength = GetCleanStyle(NewStyle, SplitString).Length;
                if (strListLength != NewStyleLength)
                {
                    ReturnValue = "";
                    Error = "样式格式的长度与输入的字符长度不符，请重新输入";
                }
                else
                {
                    //检查新样式中分隔符的位置
                    string Lengstr = "";
                    for (int i = 0; i < NewStyle.Length; i++)
                    {
                        if (NewStyle.Substring(i, 1) == SplitString)
                        {
                            Lengstr = Lengstr + "," + i;
                        }
                    }
                    if (Lengstr != "")
                    {
                        Lengstr = Lengstr.Substring(1);
                    }
                    //将分隔符放在新样式中的位置
                    string[] str = Lengstr.Split(‘,‘);
                    foreach (string bb in str)
                    {
                        StrList = StrList.Insert(int.Parse(bb), SplitString);
                    }
                    //给出最后的结果
                    ReturnValue = StrList;
                    //因为是正常的输出，没有错误
                    Error = "";
                }
            }
            return ReturnValue;
        }
        #endregion

        /// <summary>
        /// 分割字符串
        /// </summary>
        /// <param name="str"></param>
        /// <param name="splitstr"></param>
        /// <returns></returns>
        public static string[] SplitMulti(string str, string splitstr)
        {
            string[] strArray = null;
            if ((str != null) && (str != ""))
            {
                strArray = new Regex(splitstr).Split(str);
            }
            return strArray;
        }
        public static string SqlSafeString(string String, bool IsDel)
        {
            if (IsDel)
            {
                String = String.Replace("‘", "");
                String = String.Replace("\"", "");
                return String;
            }
            String = String.Replace("‘", "&#39;");
            String = String.Replace("\"", "&#34;");
            return String;
        }

        #region 获取正确的Id，如果不是正整数，返回0
        /// <summary>
        /// 获取正确的Id，如果不是正整数，返回0
        /// </summary>
        /// <param name="_value"></param>
        /// <returns>返回正确的整数ID，失败返回0</returns>
        public static int StrToId(string _value)
        {
            if (IsNumberId(_value))
                return int.Parse(_value);
            else
                return 0;
        }
        #endregion
        #region 检查一个字符串是否是纯数字构成的，一般用于查询字符串参数的有效性验证。
        /// <summary>
        /// 检查一个字符串是否是纯数字构成的，一般用于查询字符串参数的有效性验证。(0除外)
        /// </summary>
        /// <param name="_value">需验证的字符串。。</param>
        /// <returns>是否合法的bool值。</returns>
        public static bool IsNumberId(string _value)
        {
            return QuickValidate("^[1-9]*[0-9]*$", _value);
        }
        #endregion
        #region 快速验证一个字符串是否符合指定的正则表达式。
        /// <summary>
        /// 快速验证一个字符串是否符合指定的正则表达式。
        /// </summary>
        /// <param name="_express">正则表达式的内容。</param>
        /// <param name="_value">需验证的字符串。</param>
        /// <returns>是否合法的bool值。</returns>
        public static bool QuickValidate(string _express, string _value)
        {
            if (_value == null) return false;
            Regex myRegex = new Regex(_express);
            if (_value.Length == 0)
            {
                return false;
            }
            return myRegex.IsMatch(_value);
        }
        #endregion


        #region 根据配置对指定字符串进行 MD5 加密
        /// <summary>
        /// 根据配置对指定字符串进行 MD5 加密
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string GetMD5(string s)
        {
            //md5加密
            s = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(s, "md5").ToString();

            return s.ToLower().Substring(8, 16);
        }
        #endregion

        #region 得到字符串长度，一个汉字长度为2
        /// <summary>
        /// 得到字符串长度，一个汉字长度为2
        /// </summary>
        /// <param name="inputString">参数字符串</param>
        /// <returns></returns>
        public static int StrLength(string inputString)
        {
            System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
            int tempLen = 0;
            byte[] s = ascii.GetBytes(inputString);
            for (int i = 0; i < s.Length; i++)
            {
                if ((int)s[i] == 63)
                    tempLen += 2;
                else
                    tempLen += 1;
            }
            return tempLen;
        }
        #endregion

        #region 截取指定长度字符串
        /// <summary>
        /// 截取指定长度字符串
        /// </summary>
        /// <param name="inputString">要处理的字符串</param>
        /// <param name="len">指定长度</param>
        /// <returns>返回处理后的字符串</returns>
        public static string ClipString(string inputString, int len)
        {
            bool isShowFix = false;
            if (len % 2 == 1)
            {
                isShowFix = true;
                len--;
            }
            System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
            int tempLen = 0;
            string tempString = "";
            byte[] s = ascii.GetBytes(inputString);
            for (int i = 0; i < s.Length; i++)
            {
                if ((int)s[i] == 63)
                    tempLen += 2;
                else
                    tempLen += 1;

                try
                {
                    tempString += inputString.Substring(i, 1);
                }
                catch
                {
                    break;
                }

                if (tempLen > len)
                    break;
            }

            byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
            if (isShowFix && mybyte.Length > len)
                tempString += "…";
            return tempString;
        }
        #endregion



        #region HTML转行成TEXT
        /// <summary>
        /// HTML转行成TEXT
        /// </summary>
        /// <param name="strHtml"></param>
        /// <returns></returns>
        public static string HtmlToTxt(string strHtml)
        {
            string[] aryReg ={
            @"<script[^>]*?>.*?</script>",
            @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""‘])(\\[""‘tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>",
            @"([\r\n])[\s]+",
            @"&(quot|#34);",
            @"&(amp|#38);",
            @"&(lt|#60);",
            @"&(gt|#62);", 
            @"&(nbsp|#160);", 
            @"&(iexcl|#161);",
            @"&(cent|#162);",
            @"&(pound|#163);",
            @"&(copy|#169);",
            @"&#(\d+);",
            @"-->",
            @"<!--.*\n"
            };

            string newReg = aryReg[0];
            string strOutput = strHtml;
            for (int i = 0; i < aryReg.Length; i++)
            {
                Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase);
                strOutput = regex.Replace(strOutput, string.Empty);
            }

            strOutput.Replace("<", "");
            strOutput.Replace(">", "");
            strOutput.Replace("\r\n", "");


            return strOutput;
        }
        #endregion

        #region 判断对象是否为空
        /// <summary>
        /// 判断对象是否为空，为空返回true
        /// </summary>
        /// <typeparam name="T">要验证的对象的类型</typeparam>
        /// <param name="data">要验证的对象</param>        
        public static bool IsNullOrEmpty<T>(T data)
        {
            //如果为null
            if (data == null)
            {
                return true;
            }

            //如果为""
            if (data.GetType() == typeof(String))
            {
                if (string.IsNullOrEmpty(data.ToString().Trim()))
                {
                    return true;
                }
            }

            //如果为DBNull
            if (data.GetType() == typeof(DBNull))
            {
                return true;
            }

            //不为空
            return false;
        }

        /// <summary>
        /// 判断对象是否为空，为空返回true
        /// </summary>
        /// <param name="data">要验证的对象</param>
        public static bool IsNullOrEmpty(object data)
        {
            //如果为null
            if (data == null)
            {
                return true;
            }

            //如果为""
            if (data.GetType() == typeof(String))
            {
                if (string.IsNullOrEmpty(data.ToString().Trim()))
                {
                    return true;
                }
            }

            //如果为DBNull
            if (data.GetType() == typeof(DBNull))
            {
                return true;
            }

            //不为空
            return false;
        }
        #endregion
    }

/// <summary>
    /// 字符串操作类
    /// 1、GetStrArray(string str, char speater, bool toLower)  把字符串按照分隔符转换成 List
    /// 2、GetStrArray(string str) 把字符串转 按照, 分割 换为数据
    /// 3、GetArrayStr(List list, string speater) 把 List 按照分隔符组装成 string
    /// 4、GetArrayStr(List list)  得到数组列表以逗号分隔的字符串
    /// 5、GetArrayValueStr(Dictionary<int, int> list)得到数组列表以逗号分隔的字符串
    /// 6、DelLastComma(string str)删除最后结尾的一个逗号
    /// 7、DelLastChar(string str, string strchar)删除最后结尾的指定字符后的字符
    /// 8、ToSBC(string input)转全角的函数(SBC case)
    /// 9、ToDBC(string input)转半角的函数(SBC case)
    /// 10、GetSubStringList(string o_str, char sepeater)把字符串按照指定分隔符装成 List 去除重复
    /// 11、GetCleanStyle(string StrList, string SplitString)将字符串样式转换为纯字符串
    /// 12、GetNewStyle(string StrList, string NewStyle, string SplitString, out string Error)将字符串转换为新样式
    /// 13、SplitMulti(string str, string splitstr)分割字符串
    /// 14、SqlSafeString(string String, bool IsDel)
    /// </summary>
    public class StringHelper
    {
        /// <summary>
        /// 把字符串按照分隔符转换成 List
        /// </summary>
        /// <param name="str">源字符串</param>
        /// <param name="speater">分隔符</param>
        /// <param name="toLower">是否转换为小写</param>
        /// <returns></returns>
        public static List<string> GetStrArray(string str, char speater, bool toLower)
        {
            List<string> list = new List<string>();
            string[] ss = str.Split(speater);
            foreach (string s in ss)
            {
                if (!string.IsNullOrEmpty(s) && s != speater.ToString())
                {
                    string strVal = s;
                    if (toLower)
                    {
                        strVal = s.ToLower();
                    }
                    list.Add(strVal);
                }
            }
            return list;
        }
        /// <summary>
        /// 把字符串转 按照, 分割 换为数据
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string[] GetStrArray(string str)
        {
            return str.Split(new Char[] { ‘,‘ });
        }
        /// <summary>
        /// 把 List<string> 按照分隔符组装成 string
        /// </summary>
        /// <param name="list"></param>
        /// <param name="speater"></param>
        /// <returns></returns>
        public static string GetArrayStr(List<string> list, string speater)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < list.Count; i++)
            {
                if (i == list.Count - 1)
                {
                    sb.Append(list[i]);
                }
                else
                {
                    sb.Append(list[i]);
                    sb.Append(speater);
                }
            }
            return sb.ToString();
        }
        /// <summary>
        /// 得到数组列表以逗号分隔的字符串
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static string GetArrayStr(List<int> list)
        {
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < list.Count; i++)
            {
                if (i == list.Count - 1)
                {
                    sb.Append(list[i].ToString());
                }
                else
                {
                    sb.Append(list[i]);
                    sb.Append(",");
                }
            }
            return sb.ToString();
        }
        /// <summary>
        /// 得到数组列表以逗号分隔的字符串
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static string GetArrayValueStr(Dictionary<int, int> list)
        {
            StringBuilder sb = new StringBuilder();
            foreach (KeyValuePair<int, int> kvp in list)
            {
                sb.Append(kvp.Value + ",");
            }
            if (list.Count > 0)
            {
                return DelLastComma(sb.ToString());
            }
            else
            {
                return "";
            }
        }


        #region 删除最后一个字符之后的字符

        /// <summary>
        /// 删除最后结尾的一个逗号
        /// </summary>
        public static string DelLastComma(string str)
        {
            return str.Substring(0, str.LastIndexOf(","));
        }

        /// <summary>
        /// 删除最后结尾的指定字符后的字符
        /// </summary>
        public static string DelLastChar(string str, string strchar)
        {
            return str.Substring(0, str.LastIndexOf(strchar));
        }

        #endregion




        /// <summary>
        /// 转全角的函数(SBC case)
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string ToSBC(string input)
        {
            //半角转全角：
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 32)
                {
                    c[i] = (char)12288;
                    continue;
                }
                if (c[i] < 127)
                    c[i] = (char)(c[i] + 65248);
            }
            return new string(c);
        }

        /// <summary>
        ///  转半角的函数(SBC case)
        /// </summary>
        /// <param name="input">输入</param>
        /// <returns></returns>
        public static string ToDBC(string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 12288)
                {
                    c[i] = (char)32;
                    continue;
                }
                if (c[i] > 65280 && c[i] < 65375)
                    c[i] = (char)(c[i] - 65248);
            }
            return new string(c);
        }

        /// <summary>
        /// 把字符串按照指定分隔符装成 List 去除重复
        /// </summary>
        /// <param name="o_str"></param>
        /// <param name="sepeater"></param>
        /// <returns></returns>
        public static List<string> GetSubStringList(string o_str, char sepeater)
        {
            List<string> list = new List<string>();
            string[] ss = o_str.Split(sepeater);
            foreach (string s in ss)
            {
                if (!string.IsNullOrEmpty(s) && s != sepeater.ToString())
                {
                    list.Add(s);
                }
            }
            return list;
        }


        #region 将字符串样式转换为纯字符串
        /// <summary>
        ///  将字符串样式转换为纯字符串
        /// </summary>
        /// <param name="StrList"></param>
        /// <param name="SplitString"></param>
        /// <returns></returns>
        public static string GetCleanStyle(string StrList, string SplitString)
        {
            string RetrunValue = "";
            //如果为空，返回空值
            if (StrList == null)
            {
                RetrunValue = "";
            }
            else
            {
                //返回去掉分隔符
                string NewString = "";
                NewString = StrList.Replace(SplitString, "");
                RetrunValue = NewString;
            }
            return RetrunValue;
        }
        #endregion

        #region 将字符串转换为新样式
        /// <summary>
        /// 将字符串转换为新样式
        /// </summary>
        /// <param name="StrList"></param>
        /// <param name="NewStyle"></param>
        /// <param name="SplitString"></param>
        /// <param name="Error"></param>
        /// <returns></returns>
        public static string GetNewStyle(string StrList, string NewStyle, string SplitString, out string Error)
        {
            string ReturnValue = "";
            //如果输入空值，返回空，并给出错误提示
            if (StrList == null)
            {
                ReturnValue = "";
                Error = "请输入需要划分格式的字符串";
            }
            else
            {
                //检查传入的字符串长度和样式是否匹配,如果不匹配，则说明使用错误。给出错误信息并返回空值
                int strListLength = StrList.Length;
                int NewStyleLength = GetCleanStyle(NewStyle, SplitString).Length;
                if (strListLength != NewStyleLength)
                {
                    ReturnValue = "";
                    Error = "样式格式的长度与输入的字符长度不符，请重新输入";
                }
                else
                {
                    //检查新样式中分隔符的位置
                    string Lengstr = "";
                    for (int i = 0; i < NewStyle.Length; i++)
                    {
                        if (NewStyle.Substring(i, 1) == SplitString)
                        {
                            Lengstr = Lengstr + "," + i;
                        }
                    }
                    if (Lengstr != "")
                    {
                        Lengstr = Lengstr.Substring(1);
                    }
                    //将分隔符放在新样式中的位置
                    string[] str = Lengstr.Split(‘,‘);
                    foreach (string bb in str)
                    {
                        StrList = StrList.Insert(int.Parse(bb), SplitString);
                    }
                    //给出最后的结果
                    ReturnValue = StrList;
                    //因为是正常的输出，没有错误
                    Error = "";
                }
            }
            return ReturnValue;
        }
        #endregion

        /// <summary>
        /// 分割字符串
        /// </summary>
        /// <param name="str"></param>
        /// <param name="splitstr"></param>
        /// <returns></returns>
        public static string[] SplitMulti(string str, string splitstr)
        {
            string[] strArray = null;
            if ((str != null) && (str != ""))
            {
                strArray = new Regex(splitstr).Split(str);
            }
            return strArray;
        }
        public static string SqlSafeString(string String, bool IsDel)
        {
            if (IsDel)
            {
                String = String.Replace("‘", "");
                String = String.Replace("\"", "");
                return String;
            }
            String = String.Replace("‘", "&#39;");
            String = String.Replace("\"", "&#34;");
            return String;
        }

        #region 获取正确的Id，如果不是正整数，返回0
        /// <summary>
        /// 获取正确的Id，如果不是正整数，返回0
        /// </summary>
        /// <param name="_value"></param>
        /// <returns>返回正确的整数ID，失败返回0</returns>
        public static int StrToId(string _value)
        {
            if (IsNumberId(_value))
                return int.Parse(_value);
            else
                return 0;
        }
        #endregion
        #region 检查一个字符串是否是纯数字构成的，一般用于查询字符串参数的有效性验证。
        /// <summary>
        /// 检查一个字符串是否是纯数字构成的，一般用于查询字符串参数的有效性验证。(0除外)
        /// </summary>
        /// <param name="_value">需验证的字符串。。</param>
        /// <returns>是否合法的bool值。</returns>
        public static bool IsNumberId(string _value)
        {
            return QuickValidate("^[1-9]*[0-9]*$", _value);
        }
        #endregion
        #region 快速验证一个字符串是否符合指定的正则表达式。
        /// <summary>
        /// 快速验证一个字符串是否符合指定的正则表达式。
        /// </summary>
        /// <param name="_express">正则表达式的内容。</param>
        /// <param name="_value">需验证的字符串。</param>
        /// <returns>是否合法的bool值。</returns>
        public static bool QuickValidate(string _express, string _value)
        {
            if (_value == null) return false;
            Regex myRegex = new Regex(_express);
            if (_value.Length == 0)
            {
                return false;
            }
            return myRegex.IsMatch(_value);
        }
        #endregion


        #region 根据配置对指定字符串进行 MD5 加密
        /// <summary>
        /// 根据配置对指定字符串进行 MD5 加密
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string GetMD5(string s)
        {
            //md5加密
            s = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(s, "md5").ToString();

            return s.ToLower().Substring(8, 16);
        }
        #endregion

        #region 得到字符串长度，一个汉字长度为2
        /// <summary>
        /// 得到字符串长度，一个汉字长度为2
        /// </summary>
        /// <param name="inputString">参数字符串</param>
        /// <returns></returns>
        public static int StrLength(string inputString)
        {
            System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
            int tempLen = 0;
            byte[] s = ascii.GetBytes(inputString);
            for (int i = 0; i < s.Length; i++)
            {
                if ((int)s[i] == 63)
                    tempLen += 2;
                else
                    tempLen += 1;
            }
            return tempLen;
        }
        #endregion

        #region 截取指定长度字符串
        /// <summary>
        /// 截取指定长度字符串
        /// </summary>
        /// <param name="inputString">要处理的字符串</param>
        /// <param name="len">指定长度</param>
        /// <returns>返回处理后的字符串</returns>
        public static string ClipString(string inputString, int len)
        {
            bool isShowFix = false;
            if (len % 2 == 1)
            {
                isShowFix = true;
                len--;
            }
            System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
            int tempLen = 0;
            string tempString = "";
            byte[] s = ascii.GetBytes(inputString);
            for (int i = 0; i < s.Length; i++)
            {
                if ((int)s[i] == 63)
                    tempLen += 2;
                else
                    tempLen += 1;

                try
                {
                    tempString += inputString.Substring(i, 1);
                }
                catch
                {
                    break;
                }

                if (tempLen > len)
                    break;
            }

            byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
            if (isShowFix && mybyte.Length > len)
                tempString += "…";
            return tempString;
        }
        #endregion



        #region HTML转行成TEXT
        /// <summary>
        /// HTML转行成TEXT
        /// </summary>
        /// <param name="strHtml"></param>
        /// <returns></returns>
        public static string HtmlToTxt(string strHtml)
        {
            string[] aryReg ={
            @"<script[^>]*?>.*?</script>",
            @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""‘])(\\[""‘tbnr]|[^\7])*?\7|\w+)|.{0})|\s)*?(\/\s*)?>",
            @"([\r\n])[\s]+",
            @"&(quot|#34);",
            @"&(amp|#38);",
            @"&(lt|#60);",
            @"&(gt|#62);", 
            @"&(nbsp|#160);", 
            @"&(iexcl|#161);",
            @"&(cent|#162);",
            @"&(pound|#163);",
            @"&(copy|#169);",
            @"&#(\d+);",
            @"-->",
            @"<!--.*\n"
            };

            string newReg = aryReg[0];
            string strOutput = strHtml;
            for (int i = 0; i < aryReg.Length; i++)
            {
                Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase);
                strOutput = regex.Replace(strOutput, string.Empty);
            }

            strOutput.Replace("<", "");
            strOutput.Replace(">", "");
            strOutput.Replace("\r\n", "");


            return strOutput;
        }
        #endregion

        #region 判断对象是否为空
        /// <summary>
        /// 判断对象是否为空，为空返回true
        /// </summary>
        /// <typeparam name="T">要验证的对象的类型</typeparam>
        /// <param name="data">要验证的对象</param>        
        public static bool IsNullOrEmpty<T>(T data)
        {
            //如果为null
            if (data == null)
            {
                return true;
            }

            //如果为""
            if (data.GetType() == typeof(String))
            {
                if (string.IsNullOrEmpty(data.ToString().Trim()))
                {
                    return true;
                }
            }

            //如果为DBNull
            if (data.GetType() == typeof(DBNull))
            {
                return true;
            }

            //不为空
            return false;
        }

        /// <summary>
        /// 判断对象是否为空，为空返回true
        /// </summary>
        /// <param name="data">要验证的对象</param>
        public static bool IsNullOrEmpty(object data)
        {
            //如果为null
            if (data == null)
            {
                return true;
            }

            //如果为""
            if (data.GetType() == typeof(String))
            {
                if (string.IsNullOrEmpty(data.ToString().Trim()))
                {
                    return true;
                }
            }

            //如果为DBNull
            if (data.GetType() == typeof(DBNull))
            {
                return true;
            }

            //不为空
            return false;
        }
        #endregion
    }

/// <summary>
    /// 客户端脚本输出
    /// </summary>
    public class JsHelper
    {
        /// <summary>
        /// 弹出信息,并跳转指定页面。
        /// </summary>
        public static void AlertAndRedirect(string message, string toURL)
        {
            string js = "<script language=javascript>alert(‘{0}‘);window.location.replace(‘{1}‘)</script>";
            HttpContext.Current.Response.Write(string.Format(js, message, toURL));
            HttpContext.Current.Response.End();
        }

        /// <summary>
        /// 弹出信息,并返回历史页面
        /// </summary>
        public static void AlertAndGoHistory(string message, int value)
        {
            string js = @"<Script language=‘JavaScript‘>alert(‘{0}‘);history.go({1});</Script>";
            HttpContext.Current.Response.Write(string.Format(js, message, value));
            HttpContext.Current.Response.End();
        }

        /// <summary>
        /// 直接跳转到指定的页面
        /// </summary>
        public static void Redirect(string toUrl)
        {
            string js = @"<script language=javascript>window.location.replace(‘{0}‘)</script>";
            HttpContext.Current.Response.Write(string.Format(js, toUrl));
        }

        /// <summary>
        /// 弹出信息 并指定到父窗口
        /// </summary>
        public static void AlertAndParentUrl(string message, string toURL)
        {
            string js = "<script language=javascript>alert(‘{0}‘);window.top.location.replace(‘{1}‘)</script>";
            HttpContext.Current.Response.Write(string.Format(js, message, toURL));
        }

        /// <summary>
        /// 返回到父窗口
        /// </summary>
        public static void ParentRedirect(string ToUrl)
        {
            string js = "<script language=javascript>window.top.location.replace(‘{0}‘)</script>";
            HttpContext.Current.Response.Write(string.Format(js, ToUrl));
        }

        /// <summary>
        /// 返回历史页面
        /// </summary>
        public static void BackHistory(int value)
        {
            string js = @"<Script language=‘JavaScript‘>history.go({0});</Script>";
            HttpContext.Current.Response.Write(string.Format(js, value));
            HttpContext.Current.Response.End();
        }

        /// <summary>
        /// 弹出信息
        /// </summary>
        public static void Alert(string message)
        {
            string js = "<script language=javascript>alert(‘{0}‘);</script>";
            HttpContext.Current.Response.Write(string.Format(js, message));
        }

        /// <summary>
        /// 注册脚本块
        /// </summary>
        public static void RegisterScriptBlock(System.Web.UI.Page page, string _ScriptString)
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), "scriptblock", "<script type=‘text/javascript‘>" + _ScriptString + "</script>");
        }
    }

  /// <summary>
    /// 客户端脚本输出
    /// </summary>
    public class JsHelper
    {
        /// <summary>
        /// 弹出信息,并跳转指定页面。
        /// </summary>
        public static void AlertAndRedirect(string message, string toURL)
        {
            string js = "<script language=javascript>alert(‘{0}‘);window.location.replace(‘{1}‘)</script>";
            HttpContext.Current.Response.Write(string.Format(js, message, toURL));
            HttpContext.Current.Response.End();
        }

        /// <summary>
        /// 弹出信息,并返回历史页面
        /// </summary>
        public static void AlertAndGoHistory(string message, int value)
        {
            string js = @"<Script language=‘JavaScript‘>alert(‘{0}‘);history.go({1});</Script>";
            HttpContext.Current.Response.Write(string.Format(js, message, value));
            HttpContext.Current.Response.End();
        }

        /// <summary>
        /// 直接跳转到指定的页面
        /// </summary>
        public static void Redirect(string toUrl)
        {
            string js = @"<script language=javascript>window.location.replace(‘{0}‘)</script>";
            HttpContext.Current.Response.Write(string.Format(js, toUrl));
        }

        /// <summary>
        /// 弹出信息 并指定到父窗口
        /// </summary>
        public static void AlertAndParentUrl(string message, string toURL)
        {
            string js = "<script language=javascript>alert(‘{0}‘);window.top.location.replace(‘{1}‘)</script>";
            HttpContext.Current.Response.Write(string.Format(js, message, toURL));
        }

        /// <summary>
        /// 返回到父窗口
        /// </summary>
        public static void ParentRedirect(string ToUrl)
        {
            string js = "<script language=javascript>window.top.location.replace(‘{0}‘)</script>";
            HttpContext.Current.Response.Write(string.Format(js, ToUrl));
        }

        /// <summary>
        /// 返回历史页面
        /// </summary>
        public static void BackHistory(int value)
        {
            string js = @"<Script language=‘JavaScript‘>history.go({0});</Script>";
            HttpContext.Current.Response.Write(string.Format(js, value));
            HttpContext.Current.Response.End();
        }

        /// <summary>
        /// 弹出信息
        /// </summary>
        public static void Alert(string message)
        {
            string js = "<script language=javascript>alert(‘{0}‘);</script>";
            HttpContext.Current.Response.Write(string.Format(js, message));
        }

        /// <summary>
        /// 注册脚本块
        /// </summary>
        public static void RegisterScriptBlock(System.Web.UI.Page page, string _ScriptString)
        {
            page.ClientScript.RegisterStartupScript(page.GetType(), "scriptblock", "<script type=‘text/javascript‘>" + _ScriptString + "</script>");
        }
    }

public class CookieHelper
    {
        /// <summary>
        /// 清除指定Cookie
        /// </summary>
        /// <param name="cookiename">cookiename</param>
        public static void ClearCookie(string cookiename)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[cookiename];
            if (cookie != null)
            {
                cookie.Expires = DateTime.Now.AddYears(-3);
                HttpContext.Current.Response.Cookies.Add(cookie);
            }
        }
        /// <summary>
        /// 获取指定Cookie值
        /// </summary>
        /// <param name="cookiename">cookiename</param>
        /// <returns></returns>
        public static string GetCookieValue(string cookiename)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[cookiename];
            string str = string.Empty;
            if (cookie != null)
            {
                str = cookie.Value;
            }
            return str;
        }
        /// <summary>
        /// 添加一个Cookie（24小时过期）
        /// </summary>
        /// <param name="cookiename"></param>
        /// <param name="cookievalue"></param>
        public static void SetCookie(string cookiename, string cookievalue)
        {
            SetCookie(cookiename, cookievalue, DateTime.Now.AddDays(1.0));
        }
        /// <summary>
        /// 添加一个Cookie
        /// </summary>
        /// <param name="cookiename">cookie名</param>
        /// <param name="cookievalue">cookie值</param>
        /// <param name="expires">过期时间 DateTime</param>
        public static void SetCookie(string cookiename, string cookievalue, DateTime expires)
        {
            HttpCookie cookie = new HttpCookie(cookiename)
            {
                Value = cookievalue,
                Expires = expires
            };
            HttpContext.Current.Response.Cookies.Add(cookie);
        }
    }

public static class SessionHelper2
    {
        /// <summary>
        /// 添加Session，调动有效期为20分钟
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <param name="strValue">Session值</param>
        public static void Add(string strSessionName, string strValue)
        {
            HttpContext.Current.Session[strSessionName] = strValue;
            HttpContext.Current.Session.Timeout = 20;
        }

        /// <summary>
        /// 添加Session，调动有效期为20分钟
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <param name="strValues">Session值数组</param>
        public static void Adds(string strSessionName, string[] strValues)
        {
            HttpContext.Current.Session[strSessionName] = strValues;
            HttpContext.Current.Session.Timeout = 20;
        }

        /// <summary>
        /// 添加Session
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <param name="strValue">Session值</param>
        /// <param name="iExpires">调动有效期（分钟）</param>
        public static void Add(string strSessionName, string strValue, int iExpires)
        {
            HttpContext.Current.Session[strSessionName] = strValue;
            HttpContext.Current.Session.Timeout = iExpires;
        }

        /// <summary>
        /// 添加Session
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <param name="strValues">Session值数组</param>
        /// <param name="iExpires">调动有效期（分钟）</param>
        public static void Adds(string strSessionName, string[] strValues, int iExpires)
        {
            HttpContext.Current.Session[strSessionName] = strValues;
            HttpContext.Current.Session.Timeout = iExpires;
        }

        /// <summary>
        /// 读取某个Session对象值
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <returns>Session对象值</returns>
        public static string Get(string strSessionName)
        {
            if (HttpContext.Current.Session[strSessionName] == null)
            {
                return null;
            }
            else
            {
                return HttpContext.Current.Session[strSessionName].ToString();
            }
        }

        /// <summary>
        /// 读取某个Session对象值数组
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        /// <returns>Session对象值数组</returns>
        public static string[] Gets(string strSessionName)
        {
            if (HttpContext.Current.Session[strSessionName] == null)
            {
                return null;
            }
            else
            {
                return (string[])HttpContext.Current.Session[strSessionName];
            }
        }

        /// <summary>
        /// 删除某个Session对象
        /// </summary>
        /// <param name="strSessionName">Session对象名称</param>
        public static void Del(string strSessionName)
        {
            HttpContext.Current.Session[strSessionName] = null;
        }
    }

public class CacheHelper
    {
        /// <summary>
        /// 获取数据缓存
        /// </summary>
        /// <param name="CacheKey">键</param>
        public static object GetCache(string CacheKey)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            return objCache[CacheKey];
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        public static void SetCache(string CacheKey, object objObject)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject);
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        public static void SetCache(string CacheKey, object objObject, TimeSpan Timeout)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject, null, DateTime.MaxValue, Timeout, System.Web.Caching.CacheItemPriority.NotRemovable, null);
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        public static void SetCache(string CacheKey, object objObject, DateTime absoluteExpiration, TimeSpan slidingExpiration)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject, null, absoluteExpiration, slidingExpiration);
        }

        /// <summary>
        /// 移除指定数据缓存
        /// </summary>
        public static void RemoveAllCache(string CacheKey)
        {
            System.Web.Caching.Cache _cache = HttpRuntime.Cache;
            _cache.Remove(CacheKey);
        }

        /// <summary>
        /// 移除全部缓存
        /// </summary>
        public static void RemoveAllCache()
        {
            System.Web.Caching.Cache _cache = HttpRuntime.Cache;
            IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();
            while (CacheEnum.MoveNext())
            {
                _cache.Remove(CacheEnum.Key.ToString());
            }
        }
    }

/// <summary>
    /// 网络操作相关的类
    /// </summary>    
    public class NetHelper
    {
        #region 检查设置的IP地址是否正确，返回正确的IP地址
        /// <summary>
        /// 检查设置的IP地址是否正确，并返回正确的IP地址,无效IP地址返回"-1"。
        /// </summary>
        /// <param name="ip">设置的IP地址</param>
        //public static string GetValidIP(string ip)
        //{
        //    if (PageValidate.IsIP(ip))
        //    {
        //        return ip;
        //    }
        //    else
        //    {
        //        return "-1";
        //    }
        //}
        #endregion

        #region 检查设置的端口号是否正确，返回正确的端口号
        /// <summary>
        /// 检查设置的端口号是否正确，并返回正确的端口号,无效端口号返回-1。
        /// </summary>
        /// <param name="port">设置的端口号</param>        
        public static int GetValidPort(string port)
        {
            //声明返回的正确端口号
            int validPort = -1;
            //最小有效端口号
            const int MINPORT = 0;
            //最大有效端口号
            const int MAXPORT = 65535;

            //检测端口号
            try
            {
                //传入的端口号为空则抛出异常
                if (port == "")
                {
                    throw new Exception("端口号不能为空！");
                }

                //检测端口范围
                if ((Convert.ToInt32(port) < MINPORT) || (Convert.ToInt32(port) > MAXPORT))
                {
                    throw new Exception("端口号范围无效！");
                }

                //为端口号赋值
                validPort = Convert.ToInt32(port);
            }
            catch (Exception ex)
            {
                string errMessage = ex.Message;
            }
            return validPort;
        }
        #endregion

        #region 将字符串形式的IP地址转换成IPAddress对象
        /// <summary>
        /// 将字符串形式的IP地址转换成IPAddress对象
        /// </summary>
        /// <param name="ip">字符串形式的IP地址</param>        
        public static IPAddress StringToIPAddress(string ip)
        {
            return IPAddress.Parse(ip);
        }
        #endregion

        #region 获取本机的计算机名
        /// <summary>
        /// 获取本机的计算机名
        /// </summary>
        public static string LocalHostName
        {
            get
            {
                return Dns.GetHostName();
            }
        }
        #endregion

        #region 获取本机的局域网IP
        /// <summary>
        /// 获取本机的局域网IP
        /// </summary>        
        public static string LANIP
        {
            get
            {
                //获取本机的IP列表,IP列表中的第一项是局域网IP，第二项是广域网IP
                IPAddress[] addressList = Dns.GetHostEntry(Dns.GetHostName()).AddressList;

                //如果本机IP列表为空，则返回空字符串
                if (addressList.Length < 1)
                {
                    return "";
                }

                //返回本机的局域网IP
                return addressList[0].ToString();
            }
        }
        #endregion

        #region 获取本机在Internet网络的广域网IP
        /// <summary>
        /// 获取本机在Internet网络的广域网IP
        /// </summary>        
        public static string WANIP
        {
            get
            {
                //获取本机的IP列表,IP列表中的第一项是局域网IP，第二项是广域网IP
                IPAddress[] addressList = Dns.GetHostEntry(Dns.GetHostName()).AddressList;

                //如果本机IP列表小于2，则返回空字符串
                if (addressList.Length < 2)
                {
                    return "";
                }

                //返回本机的广域网IP
                return addressList[1].ToString();
            }
        }
        #endregion

        #region 获取远程客户机的IP地址
        /// <summary>
        /// 获取远程客户机的IP地址
        /// </summary>
        /// <param name="clientSocket">客户端的socket对象</param>        
        public static string GetClientIP(Socket clientSocket)
        {
            IPEndPoint client = (IPEndPoint)clientSocket.RemoteEndPoint;
            return client.Address.ToString();
        }
        #endregion

        #region 创建一个IPEndPoint对象
        /// <summary>
        /// 创建一个IPEndPoint对象
        /// </summary>
        /// <param name="ip">IP地址</param>
        /// <param name="port">端口号</param>        
        public static IPEndPoint CreateIPEndPoint(string ip, int port)
        {
            IPAddress ipAddress = StringToIPAddress(ip);
            return new IPEndPoint(ipAddress, port);
        }
        #endregion

        #region 创建一个TcpListener对象
        /// <summary>
        /// 创建一个自动分配IP和端口的TcpListener对象
        /// </summary>        
        public static TcpListener CreateTcpListener()
        {
            //创建一个自动分配的网络节点
            IPAddress ipAddress = IPAddress.Any;
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 0);

            return new TcpListener(localEndPoint);
        }
        /// <summary>
        /// 创建一个TcpListener对象
        /// </summary>
        /// <param name="ip">IP地址</param>
        /// <param name="port">端口</param>        
        public static TcpListener CreateTcpListener(string ip, int port)
        {
            //创建一个网络节点
            IPAddress ipAddress = StringToIPAddress(ip);
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, port);

            return new TcpListener(localEndPoint);
        }
        #endregion

        #region 创建一个基于TCP协议的Socket对象
        /// <summary>
        /// 创建一个基于TCP协议的Socket对象
        /// </summary>        
        public static Socket CreateTcpSocket()
        {
            return new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        }
        #endregion

        #region 创建一个基于UDP协议的Socket对象
        /// <summary>
        /// 创建一个基于UDP协议的Socket对象
        /// </summary>        
        public static Socket CreateUdpSocket()
        {
            return new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
        }
        #endregion

        #region 获取本地终结点

        #region 获取TcpListener对象的本地终结点
        /// <summary>
        /// 获取TcpListener对象的本地终结点
        /// </summary>
        /// <param name="tcpListener">TcpListener对象</param>        
        public static IPEndPoint GetLocalPoint(TcpListener tcpListener)
        {
            return (IPEndPoint)tcpListener.LocalEndpoint;
        }

        /// <summary>
        /// 获取TcpListener对象的本地终结点的IP地址
        /// </summary>
        /// <param name="tcpListener">TcpListener对象</param>        
        public static string GetLocalPoint_IP(TcpListener tcpListener)
        {
            IPEndPoint localEndPoint = (IPEndPoint)tcpListener.LocalEndpoint;
            return localEndPoint.Address.ToString();
        }

        /// <summary>
        /// 获取TcpListener对象的本地终结点的端口号
        /// </summary>
        /// <param name="tcpListener">TcpListener对象</param>        
        public static int GetLocalPoint_Port(TcpListener tcpListener)
        {
            IPEndPoint localEndPoint = (IPEndPoint)tcpListener.LocalEndpoint;
            return localEndPoint.Port;
        }
        #endregion

        #region 获取Socket对象的本地终结点
        /// <summary>
        /// 获取Socket对象的本地终结点
        /// </summary>
        /// <param name="socket">Socket对象</param>        
        public static IPEndPoint GetLocalPoint(Socket socket)
        {
            return (IPEndPoint)socket.LocalEndPoint;
        }

        /// <summary>
        /// 获取Socket对象的本地终结点的IP地址
        /// </summary>
        /// <param name="socket">Socket对象</param>        
        public static string GetLocalPoint_IP(Socket socket)
        {
            IPEndPoint localEndPoint = (IPEndPoint)socket.LocalEndPoint;
            return localEndPoint.Address.ToString();
        }

        /// <summary>
        /// 获取Socket对象的本地终结点的端口号
        /// </summary>
        /// <param name="socket">Socket对象</param>        
        public static int GetLocalPoint_Port(Socket socket)
        {
            IPEndPoint localEndPoint = (IPEndPoint)socket.LocalEndPoint;
            return localEndPoint.Port;
        }
        #endregion

        #endregion

        #region 绑定终结点
        /// <summary>
        /// 绑定终结点
        /// </summary>
        /// <param name="socket">Socket对象</param>
        /// <param name="endPoint">要绑定的终结点</param>
        public static void BindEndPoint(Socket socket, IPEndPoint endPoint)
        {
            if (!socket.IsBound)
            {
                socket.Bind(endPoint);
            }
        }

        /// <summary>
        /// 绑定终结点
        /// </summary>
        /// <param name="socket">Socket对象</param>        
        /// <param name="ip">服务器IP地址</param>
        /// <param name="port">服务器端口</param>
        public static void BindEndPoint(Socket socket, string ip, int port)
        {
            //创建终结点
            IPEndPoint endPoint = CreateIPEndPoint(ip, port);

            //绑定终结点
            if (!socket.IsBound)
            {
                socket.Bind(endPoint);
            }
        }
        #endregion

        #region 指定Socket对象执行监听
        /// <summary>
        /// 指定Socket对象执行监听，默认允许的最大挂起连接数为100
        /// </summary>
        /// <param name="socket">执行监听的Socket对象</param>
        /// <param name="port">监听的端口号</param>
        public static void StartListen(Socket socket, int port)
        {
            //创建本地终结点
            IPEndPoint localPoint = CreateIPEndPoint(NetHelper.LocalHostName, port);

            //绑定到本地终结点
            BindEndPoint(socket, localPoint);

            //开始监听
            socket.Listen(100);
        }

        /// <summary>
        /// 指定Socket对象执行监听
        /// </summary>
        /// <param name="socket">执行监听的Socket对象</param>
        /// <param name="port">监听的端口号</param>
        /// <param name="maxConnection">允许的最大挂起连接数</param>
        public static void StartListen(Socket socket, int port, int maxConnection)
        {
            //创建本地终结点
            IPEndPoint localPoint = CreateIPEndPoint(NetHelper.LocalHostName, port);

            //绑定到本地终结点
            BindEndPoint(socket, localPoint);

            //开始监听
            socket.Listen(maxConnection);
        }

        /// <summary>
        /// 指定Socket对象执行监听
        /// </summary>
        /// <param name="socket">执行监听的Socket对象</param>
        /// <param name="ip">监听的IP地址</param>
        /// <param name="port">监听的端口号</param>
        /// <param name="maxConnection">允许的最大挂起连接数</param>
        public static void StartListen(Socket socket, string ip, int port, int maxConnection)
        {
            //绑定到本地终结点
            BindEndPoint(socket, ip, port);

            //开始监听
            socket.Listen(maxConnection);
        }
        #endregion

        #region 连接到基于TCP协议的服务器
        /// <summary>
        /// 连接到基于TCP协议的服务器,连接成功返回true，否则返回false
        /// </summary>
        /// <param name="socket">Socket对象</param>
        /// <param name="ip">服务器IP地址</param>
        /// <param name="port">服务器端口号</param>     
        public static bool Connect(Socket socket, string ip, int port)
        {
            try
            {
                //连接服务器
                socket.Connect(ip, port);

                //检测连接状态
                return socket.Poll(-1, SelectMode.SelectWrite);
            }
            catch (SocketException ex)
            {
                throw new Exception(ex.Message);
                //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
            }
        }
        #endregion

        #region 以同步方式发送消息
        /// <summary>
        /// 以同步方式向指定的Socket对象发送消息
        /// </summary>
        /// <param name="socket">socket对象</param>
        /// <param name="msg">发送的消息</param>
        public static void SendMsg(Socket socket, byte[] msg)
        {
            //发送消息
            socket.Send(msg, msg.Length, SocketFlags.None);
        }

        /// <summary>
        /// 使用UTF8编码格式以同步方式向指定的Socket对象发送消息
        /// </summary>
        /// <param name="socket">socket对象</param>
        /// <param name="msg">发送的消息</param>
        public static void SendMsg(Socket socket, string msg)
        {
            //将字符串消息转换成字符数组
            byte[] buffer = ConvertHelper.StringToBytes(msg, Encoding.Default);

            //发送消息
            socket.Send(buffer, buffer.Length, SocketFlags.None);
        }
        #endregion

        #region 以同步方式接收消息
        /// <summary>
        /// 以同步方式接收消息
        /// </summary>
        /// <param name="socket">socket对象</param>
        /// <param name="buffer">接收消息的缓冲区</param>
        public static void ReceiveMsg(Socket socket, byte[] buffer)
        {
            socket.Receive(buffer);
        }

        /// <summary>
        /// 以同步方式接收消息，并转换为UTF8编码格式的字符串,使用5000字节的默认缓冲区接收。
        /// </summary>
        /// <param name="socket">socket对象</param>        
        public static string ReceiveMsg(Socket socket)
        {
            //定义接收缓冲区
            byte[] buffer = new byte[5000];
            //接收数据，获取接收到的字节数
            int receiveCount = socket.Receive(buffer);

            //定义临时缓冲区
            byte[] tempBuffer = new byte[receiveCount];
            //将接收到的数据写入临时缓冲区
            Buffer.BlockCopy(buffer, 0, tempBuffer, 0, receiveCount);
            //转换成字符串，并将其返回
            return ConvertHelper.BytesToString(tempBuffer, Encoding.Default);
        }
        #endregion

        #region 关闭基于Tcp协议的Socket对象
        /// <summary>
        /// 关闭基于Tcp协议的Socket对象
        /// </summary>
        /// <param name="socket">要关闭的Socket对象</param>
        public static void Close(Socket socket)
        {
            try
            {
                //禁止Socket对象接收和发送数据
                socket.Shutdown(SocketShutdown.Both);
            }
            catch (SocketException ex)
            {
                throw ex;
            }
            finally
            {
                //关闭Socket对象
                socket.Close();
            }
        }
        #endregion

        #region 发送电子邮件
        /// <summary>
        /// 发送电子邮件,所有SMTP配置信息均在config配置文件中system.net节设置.
        /// </summary>
        /// <param name="receiveEmail">接收电子邮件的地址</param>
        /// <param name="msgSubject">电子邮件的标题</param>
        /// <param name="msgBody">电子邮件的正文</param>
        /// <param name="IsEnableSSL">是否开启SSL</param>
        public static bool SendEmail(string receiveEmail, string msgSubject, string msgBody, bool IsEnableSSL)
        {
            //创建电子邮件对象
            MailMessage email = new MailMessage();
            //设置接收人的电子邮件地址
            email.To.Add(receiveEmail);
            //设置邮件的标题
            email.Subject = msgSubject;
            //设置邮件的正文
            email.Body = msgBody;
            //设置邮件为HTML格式
            email.IsBodyHtml = true;

            //创建SMTP客户端，将自动从配置文件中获取SMTP服务器信息
            SmtpClient smtp = new SmtpClient();
            //开启SSL
            smtp.EnableSsl = IsEnableSSL;

            try
            {
                //发送电子邮件
                smtp.Send(email);

                return true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        #endregion
    }

/// <summary>
    /// 网络操作相关的类
    /// </summary>    
    public class NetHelper
    {
        #region 检查设置的IP地址是否正确，返回正确的IP地址
        /// <summary>
        /// 检查设置的IP地址是否正确，并返回正确的IP地址,无效IP地址返回"-1"。
        /// </summary>
        /// <param name="ip">设置的IP地址</param>
        //public static string GetValidIP(string ip)
        //{
        //    if (PageValidate.IsIP(ip))
        //    {
        //        return ip;
        //    }
        //    else
        //    {
        //        return "-1";
        //    }
        //}
        #endregion

        #region 检查设置的端口号是否正确，返回正确的端口号
        /// <summary>
        /// 检查设置的端口号是否正确，并返回正确的端口号,无效端口号返回-1。
        /// </summary>
        /// <param name="port">设置的端口号</param>        
        public static int GetValidPort(string port)
        {
            //声明返回的正确端口号
            int validPort = -1;
            //最小有效端口号
            const int MINPORT = 0;
            //最大有效端口号
            const int MAXPORT = 65535;

            //检测端口号
            try
            {
                //传入的端口号为空则抛出异常
                if (port == "")
                {
                    throw new Exception("端口号不能为空！");
                }

                //检测端口范围
                if ((Convert.ToInt32(port) < MINPORT) || (Convert.ToInt32(port) > MAXPORT))
                {
                    throw new Exception("端口号范围无效！");
                }

                //为端口号赋值
                validPort = Convert.ToInt32(port);
            }
            catch (Exception ex)
            {
                string errMessage = ex.Message;
            }
            return validPort;
        }
        #endregion

        #region 将字符串形式的IP地址转换成IPAddress对象
        /// <summary>
        /// 将字符串形式的IP地址转换成IPAddress对象
        /// </summary>
        /// <param name="ip">字符串形式的IP地址</param>        
        public static IPAddress StringToIPAddress(string ip)
        {
            return IPAddress.Parse(ip);
        }
        #endregion

        #region 获取本机的计算机名
        /// <summary>
        /// 获取本机的计算机名
        /// </summary>
        public static string LocalHostName
        {
            get
            {
                return Dns.GetHostName();
            }
        }
        #endregion

        #region 获取本机的局域网IP
        /// <summary>
        /// 获取本机的局域网IP
        /// </summary>        
        public static string LANIP
        {
            get
            {
                //获取本机的IP列表,IP列表中的第一项是局域网IP，第二项是广域网IP
                IPAddress[] addressList = Dns.GetHostEntry(Dns.GetHostName()).AddressList;

                //如果本机IP列表为空，则返回空字符串
                if (addressList.Length < 1)
                {
                    return "";
                }

                //返回本机的局域网IP
                return addressList[0].ToString();
            }
        }
        #endregion

        #region 获取本机在Internet网络的广域网IP
        /// <summary>
        /// 获取本机在Internet网络的广域网IP
        /// </summary>        
        public static string WANIP
        {
            get
            {
                //获取本机的IP列表,IP列表中的第一项是局域网IP，第二项是广域网IP
                IPAddress[] addressList = Dns.GetHostEntry(Dns.GetHostName()).AddressList;

                //如果本机IP列表小于2，则返回空字符串
                if (addressList.Length < 2)
                {
                    return "";
                }

                //返回本机的广域网IP
                return addressList[1].ToString();
            }
        }
        #endregion

        #region 获取远程客户机的IP地址
        /// <summary>
        /// 获取远程客户机的IP地址
        /// </summary>
        /// <param name="clientSocket">客户端的socket对象</param>        
        public static string GetClientIP(Socket clientSocket)
        {
            IPEndPoint client = (IPEndPoint)clientSocket.RemoteEndPoint;
            return client.Address.ToString();
        }
        #endregion

        #region 创建一个IPEndPoint对象
        /// <summary>
        /// 创建一个IPEndPoint对象
        /// </summary>
        /// <param name="ip">IP地址</param>
        /// <param name="port">端口号</param>        
        public static IPEndPoint CreateIPEndPoint(string ip, int port)
        {
            IPAddress ipAddress = StringToIPAddress(ip);
            return new IPEndPoint(ipAddress, port);
        }
        #endregion

        #region 创建一个TcpListener对象
        /// <summary>
        /// 创建一个自动分配IP和端口的TcpListener对象
        /// </summary>        
        public static TcpListener CreateTcpListener()
        {
            //创建一个自动分配的网络节点
            IPAddress ipAddress = IPAddress.Any;
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 0);

            return new TcpListener(localEndPoint);
        }
        /// <summary>
        /// 创建一个TcpListener对象
        /// </summary>
        /// <param name="ip">IP地址</param>
        /// <param name="port">端口</param>        
        public static TcpListener CreateTcpListener(string ip, int port)
        {
            //创建一个网络节点
            IPAddress ipAddress = StringToIPAddress(ip);
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, port);

            return new TcpListener(localEndPoint);
        }
        #endregion

        #region 创建一个基于TCP协议的Socket对象
        /// <summary>
        /// 创建一个基于TCP协议的Socket对象
        /// </summary>        
        public static Socket CreateTcpSocket()
        {
            return new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        }
        #endregion

        #region 创建一个基于UDP协议的Socket对象
        /// <summary>
        /// 创建一个基于UDP协议的Socket对象
        /// </summary>        
        public static Socket CreateUdpSocket()
        {
            return new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
        }
        #endregion

        #region 获取本地终结点

        #region 获取TcpListener对象的本地终结点
        /// <summary>
        /// 获取TcpListener对象的本地终结点
        /// </summary>
        /// <param name="tcpListener">TcpListener对象</param>        
        public static IPEndPoint GetLocalPoint(TcpListener tcpListener)
        {
            return (IPEndPoint)tcpListener.LocalEndpoint;
        }

        /// <summary>
        /// 获取TcpListener对象的本地终结点的IP地址
        /// </summary>
        /// <param name="tcpListener">TcpListener对象</param>        
        public static string GetLocalPoint_IP(TcpListener tcpListener)
        {
            IPEndPoint localEndPoint = (IPEndPoint)tcpListener.LocalEndpoint;
            return localEndPoint.Address.ToString();
        }

        /// <summary>
        /// 获取TcpListener对象的本地终结点的端口号
        /// </summary>
        /// <param name="tcpListener">TcpListener对象</param>        
        public static int GetLocalPoint_Port(TcpListener tcpListener)
        {
            IPEndPoint localEndPoint = (IPEndPoint)tcpListener.LocalEndpoint;
            return localEndPoint.Port;
        }
        #endregion

        #region 获取Socket对象的本地终结点
        /// <summary>
        /// 获取Socket对象的本地终结点
        /// </summary>
        /// <param name="socket">Socket对象</param>        
        public static IPEndPoint GetLocalPoint(Socket socket)
        {
            return (IPEndPoint)socket.LocalEndPoint;
        }

        /// <summary>
        /// 获取Socket对象的本地终结点的IP地址
        /// </summary>
        /// <param name="socket">Socket对象</param>        
        public static string GetLocalPoint_IP(Socket socket)
        {
            IPEndPoint localEndPoint = (IPEndPoint)socket.LocalEndPoint;
            return localEndPoint.Address.ToString();
        }

        /// <summary>
        /// 获取Socket对象的本地终结点的端口号
        /// </summary>
        /// <param name="socket">Socket对象</param>        
        public static int GetLocalPoint_Port(Socket socket)
        {
            IPEndPoint localEndPoint = (IPEndPoint)socket.LocalEndPoint;
            return localEndPoint.Port;
        }
        #endregion

        #endregion

        #region 绑定终结点
        /// <summary>
        /// 绑定终结点
        /// </summary>
        /// <param name="socket">Socket对象</param>
        /// <param name="endPoint">要绑定的终结点</param>
        public static void BindEndPoint(Socket socket, IPEndPoint endPoint)
        {
            if (!socket.IsBound)
            {
                socket.Bind(endPoint);
            }
        }

        /// <summary>
        /// 绑定终结点
        /// </summary>
        /// <param name="socket">Socket对象</param>        
        /// <param name="ip">服务器IP地址</param>
        /// <param name="port">服务器端口</param>
        public static void BindEndPoint(Socket socket, string ip, int port)
        {
            //创建终结点
            IPEndPoint endPoint = CreateIPEndPoint(ip, port);

            //绑定终结点
            if (!socket.IsBound)
            {
                socket.Bind(endPoint);
            }
        }
        #endregion

        #region 指定Socket对象执行监听
        /// <summary>
        /// 指定Socket对象执行监听，默认允许的最大挂起连接数为100
        /// </summary>
        /// <param name="socket">执行监听的Socket对象</param>
        /// <param name="port">监听的端口号</param>
        public static void StartListen(Socket socket, int port)
        {
            //创建本地终结点
            IPEndPoint localPoint = CreateIPEndPoint(NetHelper.LocalHostName, port);

            //绑定到本地终结点
            BindEndPoint(socket, localPoint);

            //开始监听
            socket.Listen(100);
        }

        /// <summary>
        /// 指定Socket对象执行监听
        /// </summary>
        /// <param name="socket">执行监听的Socket对象</param>
        /// <param name="port">监听的端口号</param>
        /// <param name="maxConnection">允许的最大挂起连接数</param>
        public static void StartListen(Socket socket, int port, int maxConnection)
        {
            //创建本地终结点
            IPEndPoint localPoint = CreateIPEndPoint(NetHelper.LocalHostName, port);

            //绑定到本地终结点
            BindEndPoint(socket, localPoint);

            //开始监听
            socket.Listen(maxConnection);
        }

        /// <summary>
        /// 指定Socket对象执行监听
        /// </summary>
        /// <param name="socket">执行监听的Socket对象</param>
        /// <param name="ip">监听的IP地址</param>
        /// <param name="port">监听的端口号</param>
        /// <param name="maxConnection">允许的最大挂起连接数</param>
        public static void StartListen(Socket socket, string ip, int port, int maxConnection)
        {
            //绑定到本地终结点
            BindEndPoint(socket, ip, port);

            //开始监听
            socket.Listen(maxConnection);
        }
        #endregion

        #region 连接到基于TCP协议的服务器
        /// <summary>
        /// 连接到基于TCP协议的服务器,连接成功返回true，否则返回false
        /// </summary>
        /// <param name="socket">Socket对象</param>
        /// <param name="ip">服务器IP地址</param>
        /// <param name="port">服务器端口号</param>     
        public static bool Connect(Socket socket, string ip, int port)
        {
            try
            {
                //连接服务器
                socket.Connect(ip, port);

                //检测连接状态
                return socket.Poll(-1, SelectMode.SelectWrite);
            }
            catch (SocketException ex)
            {
                throw new Exception(ex.Message);
                //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
            }
        }
        #endregion

        #region 以同步方式发送消息
        /// <summary>
        /// 以同步方式向指定的Socket对象发送消息
        /// </summary>
        /// <param name="socket">socket对象</param>
        /// <param name="msg">发送的消息</param>
        public static void SendMsg(Socket socket, byte[] msg)
        {
            //发送消息
            socket.Send(msg, msg.Length, SocketFlags.None);
        }

        /// <summary>
        /// 使用UTF8编码格式以同步方式向指定的Socket对象发送消息
        /// </summary>
        /// <param name="socket">socket对象</param>
        /// <param name="msg">发送的消息</param>
        public static void SendMsg(Socket socket, string msg)
        {
            //将字符串消息转换成字符数组
            byte[] buffer = ConvertHelper.StringToBytes(msg, Encoding.Default);

            //发送消息
            socket.Send(buffer, buffer.Length, SocketFlags.None);
        }
        #endregion

        #region 以同步方式接收消息
        /// <summary>
        /// 以同步方式接收消息
        /// </summary>
        /// <param name="socket">socket对象</param>
        /// <param name="buffer">接收消息的缓冲区</param>
        public static void ReceiveMsg(Socket socket, byte[] buffer)
        {
            socket.Receive(buffer);
        }

        /// <summary>
        /// 以同步方式接收消息，并转换为UTF8编码格式的字符串,使用5000字节的默认缓冲区接收。
        /// </summary>
        /// <param name="socket">socket对象</param>        
        public static string ReceiveMsg(Socket socket)
        {
            //定义接收缓冲区
            byte[] buffer = new byte[5000];
            //接收数据，获取接收到的字节数
            int receiveCount = socket.Receive(buffer);

            //定义临时缓冲区
            byte[] tempBuffer = new byte[receiveCount];
            //将接收到的数据写入临时缓冲区
            Buffer.BlockCopy(buffer, 0, tempBuffer, 0, receiveCount);
            //转换成字符串，并将其返回
            return ConvertHelper.BytesToString(tempBuffer, Encoding.Default);
        }
        #endregion

        #region 关闭基于Tcp协议的Socket对象
        /// <summary>
        /// 关闭基于Tcp协议的Socket对象
        /// </summary>
        /// <param name="socket">要关闭的Socket对象</param>
        public static void Close(Socket socket)
        {
            try
            {
                //禁止Socket对象接收和发送数据
                socket.Shutdown(SocketShutdown.Both);
            }
            catch (SocketException ex)
            {
                throw ex;
            }
            finally
            {
                //关闭Socket对象
                socket.Close();
            }
        }
        #endregion

        #region 发送电子邮件
        /// <summary>
        /// 发送电子邮件,所有SMTP配置信息均在config配置文件中system.net节设置.
        /// </summary>
        /// <param name="receiveEmail">接收电子邮件的地址</param>
        /// <param name="msgSubject">电子邮件的标题</param>
        /// <param name="msgBody">电子邮件的正文</param>
        /// <param name="IsEnableSSL">是否开启SSL</param>
        public static bool SendEmail(string receiveEmail, string msgSubject, string msgBody, bool IsEnableSSL)
        {
            //创建电子邮件对象
            MailMessage email = new MailMessage();
            //设置接收人的电子邮件地址
            email.To.Add(receiveEmail);
            //设置邮件的标题
            email.Subject = msgSubject;
            //设置邮件的正文
            email.Body = msgBody;
            //设置邮件为HTML格式
            email.IsBodyHtml = true;

            //创建SMTP客户端，将自动从配置文件中获取SMTP服务器信息
            SmtpClient smtp = new SmtpClient();
            //开启SSL
            smtp.EnableSsl = IsEnableSSL;

            try
            {
                //发送电子邮件
                smtp.Send(email);

                return true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        #endregion
    }

#region 序列化
    public class  Serialize  
    {   
        /// <summary>
        /// 序列化为对象
        /// </summary>
        /// <param name="objname"></param>
        /// <param name="obj"></param>
        public static void BinarySerialize(string objname,object obj)
        {
            try
            {
                string filename = objname + ".Binary";
                if(System.IO.File.Exists(filename))
                    System.IO.File.Delete(filename);
                using (FileStream fileStream = new FileStream(filename, FileMode.Create))
                {
                    // 用二进制格式序列化
                    BinaryFormatter binaryFormatter = new BinaryFormatter();
                    binaryFormatter.Serialize(fileStream, obj);
                    fileStream.Close();
                }
            }
            catch(Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 从二进制文件中反序列化
        /// </summary>
        /// <param name="objname"></param>
        /// <returns></returns>
        public static object BinaryDeserialize(string objname)
        {
            System.Runtime.Serialization.IFormatter formatter = new BinaryFormatter();
            //二进制格式反序列化
            object obj;
            string filename = objname + ".Binary";
            if(!System.IO.File.Exists(filename))
                throw new Exception("在反序列化之前,请先序列化");
            using (Stream stream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                obj = formatter.Deserialize(stream);
                stream.Close();
            }
            //using (FileStream fs = new FileStream(filename, FileMode.Open))
            //{
            //    BinaryFormatter formatter = new BinaryFormatter();
            //    object obj = formatter.Deserialize(fs);
            //}
            return obj;

        }

        /// <summary>
        /// 序列化为soap 即xml
        /// </summary>
        /// <param name="objname"></param>
        /// <returns></returns>
        public static void SoapSerialize(string objname,object obj)
        {
            try
            {  
                string filename=objname+".Soap";
                if(System.IO.File.Exists(filename))
                    System.IO.File.Delete(filename);
                using (FileStream fileStream = new FileStream(filename, FileMode.Create))
                {
                    // 序列化为Soap
                    SoapFormatter formatter = new SoapFormatter();
                    formatter.Serialize(fileStream, obj);
                    fileStream.Close();
                }

            }
            catch(Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }


        /// <summary>
        /// 反序列对象
        /// </summary>
        /// <param name="objname"></param>
        public static object SoapDeserialize(string objname)
        {
            object obj;
            System.Runtime.Serialization.IFormatter formatter = new SoapFormatter();
            string filename=objname+".Soap";
            if (!System.IO.File.Exists(filename))
                throw new Exception("对反序列化之前,请先序列化");
            //Soap格式反序列化
            using (Stream stream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                obj = formatter.Deserialize(stream);
                stream.Close();
            }
            return obj;
        }

        public static void XmlSerialize(string objname,object obj)
        {
             
            try
            {
                string filename=objname+".xml";
                if(System.IO.File.Exists(filename))
                    System.IO.File.Delete(filename);
                using (FileStream fileStream = new FileStream(filename, FileMode.Create))
                {
                    // 序列化为xml
                    XmlSerializer formatter = new XmlSerializer(typeof(Car));
                    formatter.Serialize(fileStream, obj);
                    fileStream.Close();
                }
            }
            catch(Exception ex)
            {
                throw new Exception(ex.Message);
            }

        }


        /// <summary>
        /// 从xml序列中反序列化
        /// </summary>
        /// <param name="objname"></param>
        /// <returns></returns>
        public static object XmlDeserailize(string objname)
        {
           // System.Runtime.Serialization.IFormatter formatter = new XmlSerializer(typeof(Car));
            string filename=objname+".xml";
            object obj;
            if (!System.IO.File.Exists(filename))
                throw new Exception("对反序列化之前,请先序列化");
            //Xml格式反序列化
            using (Stream stream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
            {
                XmlSerializer formatter = new XmlSerializer(typeof(Car));
                obj = (Car)formatter.Deserialize(stream);
                stream.Close();
            }
            return obj; 
        }
    }
    #endregion

    #region 要序列化的类
    [Serializable]
    public class Car
    {
        private string _Price;
        private string _Owner;
        private string m_filename;

        [XmlElement(ElementName = "Price")]
        public string Price
        {
            get { return this._Price; }
            set { this._Price = value; }
        }

        [XmlElement(ElementName = "Owner")]
        public string Owner
        {
            get { return this._Owner; }
            set { this._Owner = value; }
        }

        public string Filename
        {
            get
            {
                return m_filename;
            }
            set
            {
                m_filename = value;
            }
        }

        public Car(string o, string p)
        {
            this.Price = p;
            this.Owner = o;
        }

        public Car()
        {

        }
    }
    #endregion

    #region 调用示例
    public class Demo
    {
        public void DemoFunction()
        {
            //序列化
            Car car = new Car("chenlin", "120万");
            Serialize.BinarySerialize("Binary序列化", car);
            Serialize.SoapSerialize("Soap序列化", car);
            Serialize.XmlSerialize("XML序列化", car);
            //反序列化
            Car car2 = (Car)Serialize.BinaryDeserialize("Binary序列化");
            car2 = (Car)Serialize.SoapDeserialize("Soap序列化");
            car2 = (Car)Serialize.XmlDeserailize("XML序列化");
        }
    }
    #endregion

/// <summary>
    /// 验证码类
    /// </summary>
    public class Rand
    {
        #region 生成随机数字
        /// <summary>
        /// 生成随机数字
        /// </summary>
        /// <param name="length">生成长度</param>
        public static string Number(int Length)
        {
            return Number(Length, false);
        }

        /// <summary>
        /// 生成随机数字
        /// </summary>
        /// <param name="Length">生成长度</param>
        /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
        public static string Number(int Length, bool Sleep)
        {
            if (Sleep) System.Threading.Thread.Sleep(3);
            string result = "";
            System.Random random = new Random();
            for (int i = 0; i < Length; i++)
            {
                result += random.Next(10).ToString();
            }
            return result;
        }
        #endregion

        #region 生成随机字母与数字
        /// <summary>
        /// 生成随机字母与数字
        /// </summary>
        /// <param name="IntStr">生成长度</param>
        public static string Str(int Length)
        {
            return Str(Length, false);
        }

        /// <summary>
        /// 生成随机字母与数字
        /// </summary>
        /// <param name="Length">生成长度</param>
        /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
        public static string Str(int Length, bool Sleep)
        {
            if (Sleep) System.Threading.Thread.Sleep(3);
            char[] Pattern = new char[] { ‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘, ‘A‘, ‘B‘, ‘C‘, ‘D‘, ‘E‘, ‘F‘, ‘G‘, ‘H‘, ‘I‘, ‘J‘, ‘K‘, ‘L‘, ‘M‘, ‘N‘, ‘O‘, ‘P‘, ‘Q‘, ‘R‘, ‘S‘, ‘T‘, ‘U‘, ‘V‘, ‘W‘, ‘X‘, ‘Y‘, ‘Z‘ };
            string result = "";
            int n = Pattern.Length;
            System.Random random = new Random(~unchecked((int)DateTime.Now.Ticks));
            for (int i = 0; i < Length; i++)
            {
                int rnd = random.Next(0, n);
                result += Pattern[rnd];
            }
            return result;
        }
        #endregion

        #region 生成随机纯字母随机数
        /// <summary>
        /// 生成随机纯字母随机数
        /// </summary>
        /// <param name="IntStr">生成长度</param>
        public static string Str_char(int Length)
        {
            return Str_char(Length, false);
        }

        /// <summary>
        /// 生成随机纯字母随机数
        /// </summary>
        /// <param name="Length">生成长度</param>
        /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
        public static string Str_char(int Length, bool Sleep)
        {
            if (Sleep) System.Threading.Thread.Sleep(3);
            char[] Pattern = new char[] { ‘A‘, ‘B‘, ‘C‘, ‘D‘, ‘E‘, ‘F‘, ‘G‘, ‘H‘, ‘I‘, ‘J‘, ‘K‘, ‘L‘, ‘M‘, ‘N‘, ‘O‘, ‘P‘, ‘Q‘, ‘R‘, ‘S‘, ‘T‘, ‘U‘, ‘V‘, ‘W‘, ‘X‘, ‘Y‘, ‘Z‘ };
            string result = "";
            int n = Pattern.Length;
            System.Random random = new Random(~unchecked((int)DateTime.Now.Ticks));
            for (int i = 0; i < Length; i++)
            {
                int rnd = random.Next(0, n);
                result += Pattern[rnd];
            }
            return result;
        }
        #endregion
    }

    /// <summary>
    /// 验证图片类
    /// </summary>
    public class YZMHelper
    {
        #region 私有字段
        private string text;
        private Bitmap image;
        private int letterCount = 4;   //验证码位数
        private int letterWidth = 16;  //单个字体的宽度范围
        private int letterHeight = 20; //单个字体的高度范围
        private static byte[] randb = new byte[4];
        private static RNGCryptoServiceProvider rand = new RNGCryptoServiceProvider();
        private Font[] fonts = 
    {
       new Font(new FontFamily("Times New Roman"),10 +Next(1),System.Drawing.FontStyle.Regular),
       new Font(new FontFamily("Georgia"), 10 + Next(1),System.Drawing.FontStyle.Regular),
       new Font(new FontFamily("Arial"), 10 + Next(1),System.Drawing.FontStyle.Regular),
       new Font(new FontFamily("Comic Sans MS"), 10 + Next(1),System.Drawing.FontStyle.Regular)
    };
        #endregion

        #region 公有属性
        /// <summary>
        /// 验证码
        /// </summary>
        public string Text
        {
            get { return this.text; }
        }

        /// <summary>
        /// 验证码图片
        /// </summary>
        public Bitmap Image
        {
            get { return this.image; }
        }
        #endregion

        #region 构造函数
        public YZMHelper()
        {
            HttpContext.Current.Response.Expires = 0;
            HttpContext.Current.Response.Buffer = true;
            HttpContext.Current.Response.ExpiresAbsolute = DateTime.Now.AddSeconds(-1);
            HttpContext.Current.Response.AddHeader("pragma", "no-cache");
            HttpContext.Current.Response.CacheControl = "no-cache";
            this.text = Rand.Number(4);
            CreateImage();
        }
        #endregion

        #region 私有方法
        /// <summary>
        /// 获得下一个随机数
        /// </summary>
        /// <param name="max">最大值</param>
        private static int Next(int max)
        {
            rand.GetBytes(randb);
            int value = BitConverter.ToInt32(randb, 0);
            value = value % (max + 1);
            if (value < 0) value = -value;
            return value;
        }

        /// <summary>
        /// 获得下一个随机数
        /// </summary>
        /// <param name="min">最小值</param>
        /// <param name="max">最大值</param>
        private static int Next(int min, int max)
        {
            int value = Next(max - min) + min;
            return value;
        }
        #endregion

        #region 公共方法
        /// <summary>
        /// 绘制验证码
        /// </summary>
        public void CreateImage()
        {
            int int_ImageWidth = this.text.Length * letterWidth;
            Bitmap image = new Bitmap(int_ImageWidth, letterHeight);
            Graphics g = Graphics.FromImage(image);
            g.Clear(Color.White);
            for (int i = 0; i < 2; i++)
            {
                int x1 = Next(image.Width - 1);
                int x2 = Next(image.Width - 1);
                int y1 = Next(image.Height - 1);
                int y2 = Next(image.Height - 1);
                g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
            }
            int _x = -12, _y = 0;
            for (int int_index = 0; int_index < this.text.Length; int_index++)
            {
                _x += Next(12, 16);
                _y = Next(-2, 2);
                string str_char = this.text.Substring(int_index, 1);
                str_char = Next(1) == 1 ? str_char.ToLower() : str_char.ToUpper();
                Brush newBrush = new SolidBrush(GetRandomColor());
                Point thePos = new Point(_x, _y);
                g.DrawString(str_char, fonts[Next(fonts.Length - 1)], newBrush, thePos);
            }
            for (int i = 0; i < 10; i++)
            {
                int x = Next(image.Width - 1);
                int y = Next(image.Height - 1);
                image.SetPixel(x, y, Color.FromArgb(Next(0, 255), Next(0, 255), Next(0, 255)));
            }
            image = TwistImage(image, true, Next(1, 3), Next(4, 6));
            g.DrawRectangle(new Pen(Color.LightGray, 1), 0, 0, int_ImageWidth - 1, (letterHeight - 1));
            this.image = image;
        }

        /// <summary>
        /// 字体随机颜色
        /// </summary>
        public Color GetRandomColor()
        {
            Random RandomNum_First = new Random((int)DateTime.Now.Ticks);
            System.Threading.Thread.Sleep(RandomNum_First.Next(50));
            Random RandomNum_Sencond = new Random((int)DateTime.Now.Ticks);
            int int_Red = RandomNum_First.Next(180);
            int int_Green = RandomNum_Sencond.Next(180);
            int int_Blue = (int_Red + int_Green > 300) ? 0 : 400 - int_Red - int_Green;
            int_Blue = (int_Blue > 255) ? 255 : int_Blue;
            return Color.FromArgb(int_Red, int_Green, int_Blue);
        }

        /// <summary>
        /// 正弦曲线Wave扭曲图片
        /// </summary>
        /// <param name="srcBmp">图片路径</param>
        /// <param name="bXDir">如果扭曲则选择为True</param>
        /// <param name="nMultValue">波形的幅度倍数，越大扭曲的程度越高,一般为3</param>
        /// <param name="dPhase">波形的起始相位,取值区间[0-2*PI)</param>
        public System.Drawing.Bitmap TwistImage(Bitmap srcBmp, bool bXDir, double dMultValue, double dPhase)
        {
            double PI = 6.283185307179586476925286766559;
            Bitmap destBmp = new Bitmap(srcBmp.Width, srcBmp.Height);
            Graphics graph = Graphics.FromImage(destBmp);
            graph.FillRectangle(new SolidBrush(Color.White), 0, 0, destBmp.Width, destBmp.Height);
            graph.Dispose();
            double dBaseAxisLen = bXDir ? (double)destBmp.Height : (double)destBmp.Width;
            for (int i = 0; i < destBmp.Width; i++)
            {
                for (int j = 0; j < destBmp.Height; j++)
                {
                    double dx = 0;
                    dx = bXDir ? (PI * (double)j) / dBaseAxisLen : (PI * (double)i) / dBaseAxisLen;
                    dx += dPhase;
                    double dy = Math.Sin(dx);
                    int nOldX = 0, nOldY = 0;
                    nOldX = bXDir ? i + (int)(dy * dMultValue) : i;
                    nOldY = bXDir ? j : j + (int)(dy * dMultValue);

                    Color color = srcBmp.GetPixel(i, j);
                    if (nOldX >= 0 && nOldX < destBmp.Width
                     && nOldY >= 0 && nOldY < destBmp.Height)
                    {
                        destBmp.SetPixel(nOldX, nOldY, color);
                    }
                }
            }
            srcBmp.Dispose();
            return destBmp;
        }
        #endregion
    }

/// <summary>
    /// 系统操作相关的公共类
    /// </summary>    
    public static class SysHelper
    {
        #region 获取文件相对路径映射的物理路径
        /// <summary>
        /// 获取文件相对路径映射的物理路径
        /// </summary>
        /// <param name="virtualPath">文件的相对路径</param>        
        public static string GetPath(string virtualPath)
        {

            return HttpContext.Current.Server.MapPath(virtualPath);

        }
        #endregion

       

        #region 获取指定调用层级的方法名
        /// <summary>
        /// 获取指定调用层级的方法名
        /// </summary>
        /// <param name="level">调用的层数</param>        
        public static string GetMethodName(int level)
        {
            //创建一个堆栈跟踪
            StackTrace trace = new StackTrace();

            //获取指定调用层级的方法名
            return trace.GetFrame(level).GetMethod().Name;
        }
        #endregion

        #region 获取GUID值
        /// <summary>
        /// 获取GUID值
        /// </summary>
        public static string NewGUID
        {
            get
            {
                return Guid.NewGuid().ToString();
            }
        }
        #endregion

        #region 获取换行字符
        /// <summary>
        /// 获取换行字符
        /// </summary>
        public static string NewLine
        {
            get
            {
                return Environment.NewLine;
            }
        }
        #endregion

        #region 获取当前应用程序域
        /// <summary>
        /// 获取当前应用程序域
        /// </summary>
        public static AppDomain CurrentAppDomain
        {
            get
            {
                return Thread.GetDomain();
            }
        }
        #endregion


    }

/// <summary>
    /// 处理数据类型转换，数制转换、编码转换相关的类
    /// </summary>    
    public sealed class ConvertHelper
    {
        #region 补足位数
        /// <summary>
        /// 指定字符串的固定长度，如果字符串小于固定长度，
        /// 则在字符串的前面补足零，可设置的固定长度最大为9位
        /// </summary>
        /// <param name="text">原始字符串</param>
        /// <param name="limitedLength">字符串的固定长度</param>
        public static string RepairZero(string text, int limitedLength)
        {
            //补足0的字符串
            string temp = "";

            //补足0
            for (int i = 0; i < limitedLength - text.Length; i++)
            {
                temp += "0";
            }

            //连接text
            temp += text;

            //返回补足0的字符串
            return temp;
        }
        #endregion

        #region 各进制数间转换
        /// <summary>
        /// 实现各进制数间的转换。ConvertBase("15",10,16)表示将十进制数15转换为16进制的数。
        /// </summary>
        /// <param name="value">要转换的值,即原值</param>
        /// <param name="from">原值的进制,只能是2,8,10,16四个值。</param>
        /// <param name="to">要转换到的目标进制，只能是2,8,10,16四个值。</param>
        public static string ConvertBase(string value, int from, int to)
        {
            try
            {
                int intValue = Convert.ToInt32(value, from);  //先转成10进制
                string result = Convert.ToString(intValue, to);  //再转成目标进制
                if (to == 2)
                {
                    int resultLength = result.Length;  //获取二进制的长度
                    switch (resultLength)
                    {
                        case 7:
                            result = "0" + result;
                            break;
                        case 6:
                            result = "00" + result;
                            break;
                        case 5:
                            result = "000" + result;
                            break;
                        case 4:
                            result = "0000" + result;
                            break;
                        case 3:
                            result = "00000" + result;
                            break;
                    }
                }
                return result;
            }
            catch
            {

                //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
                return "0";
            }
        }
        #endregion

        #region 使用指定字符集将string转换成byte[]
        /// <summary>
        /// 使用指定字符集将string转换成byte[]
        /// </summary>
        /// <param name="text">要转换的字符串</param>
        /// <param name="encoding">字符编码</param>
        public static byte[] StringToBytes(string text, Encoding encoding)
        {
            return encoding.GetBytes(text);
        }
        #endregion

        #region 使用指定字符集将byte[]转换成string
        /// <summary>
        /// 使用指定字符集将byte[]转换成string
        /// </summary>
        /// <param name="bytes">要转换的字节数组</param>
        /// <param name="encoding">字符编码</param>
        public static string BytesToString(byte[] bytes, Encoding encoding)
        {
            return encoding.GetString(bytes);
        }
        #endregion

        #region 将byte[]转换成int
        /// <summary>
        /// 将byte[]转换成int
        /// </summary>
        /// <param name="data">需要转换成整数的byte数组</param>
        public static int BytesToInt32(byte[] data)
        {
            //如果传入的字节数组长度小于4,则返回0
            if (data.Length < 4)
            {
                return 0;
            }

            //定义要返回的整数
            int num = 0;

            //如果传入的字节数组长度大于4,需要进行处理
            if (data.Length >= 4)
            {
                //创建一个临时缓冲区
                byte[] tempBuffer = new byte[4];

                //将传入的字节数组的前4个字节复制到临时缓冲区
                Buffer.BlockCopy(data, 0, tempBuffer, 0, 4);

                //将临时缓冲区的值转换成整数，并赋给num
                num = BitConverter.ToInt32(tempBuffer, 0);
            }

            //返回整数
            return num;
        }
        #endregion


    }