标签：tput bsp last pre 过滤 oid oca row ++
public static bool IsNumeric(string expression)
{
if (expression != null)
{
string str = expression;
if (str.Length > 0 && str.Length <= 11 && Regex.IsMatch(str, @"^[-]?[0-9]*[.]?[0-9]*$"))
{
if ((str.Length < 10) || (str.Length == 10 && str[0] == ‘1‘) || (str.Length == 11 && str[0] == ‘-‘ && str[1] == ‘1‘))
return true;
}
}
return false;
}
// 判断对象是否为Double类型
public static bool IsDouble(object expression)
{
if (expression != null)
return Regex.IsMatch(expression.ToString(), @"^([0-9])[0-9]*(\.\w*)?$");
return false;
}
// 检测是否符合email格式
public static bool IsValidEmail(string strEmail)
{
return Regex.IsMatch(strEmail, @"^[\w\.]+([-]\w+)*@[A-Za-z0-9-_]+[\.][A-Za-z0-9-_]");
}
public static bool IsValidDoEmail(string strEmail)
{
return Regex.IsMatch(strEmail, @"^@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
}
// 检测是否是正确的Url
public static bool IsURL(string strUrl)
{
return Regex.IsMatch(strUrl, @"^(http|https)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)*((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|localhost|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{1,10}))(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\?\‘\\\+&%\$#\=~_\-]+))*$");
}
// 删除最后结尾的指定字符后的字符
public static string DelLastChar(string str, string strchar)
{
if (string.IsNullOrEmpty(str))
return "";
if (str.LastIndexOf(strchar) >= 0 && str.LastIndexOf(strchar) == str.Length - 1)
{
return str.Substring(0, str.LastIndexOf(strchar));
}
return str;
}
// 生成随机数字
/// <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;
}
// 生成随机字母字符串(数字字母混和)
/// <param name="codeCount">待生成的位数</param>
public static string GetCheckCode(int codeCount)
{
string str = string.Empty;
int rep = 0;
long num2 = DateTime.Now.Ticks + rep;
rep++;
Random random = new Random(((int)(((ulong)num2) & 0xffffffffL)) | ((int)(num2 >> rep)));
for (int i = 0; i < codeCount; i++)
{
char ch;
int num = random.Next();
if ((num % 2) == 0)
{
ch = (char)(0x30 + ((ushort)(num % 10)));
}
else
{
ch = (char)(0x41 + ((ushort)(num % 0x1a)));
}
str = str + ch.ToString();
}
return str;
}
//清除HTML标记
public static string DropHTML(string Htmlstring)
{
if (string.IsNullOrEmpty(Htmlstring)) return "";
//删除脚本
Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
//删除HTML
Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);
Htmlstring.Replace("<", "");
Htmlstring.Replace(">", "");
Htmlstring.Replace("\r\n", "");
Htmlstring.Replace(" ", "");
Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();
return Htmlstring;
}
//把TXT代码转换成HTML格式
public static String ToHtml(string Input)
{
StringBuilder sb = new StringBuilder(Input);
sb.Replace("‘", "'");
sb.Replace("&", "&");
sb.Replace("<", "<");
sb.Replace(">", ">");
sb.Replace("\r\n", "<br />");
sb.Replace("\n", "<br />");
sb.Replace("\t", " ");
//sb.Replace(" ", " ");
return sb.ToString();
}
//把HTML代码转换成TXT格式
public static String ToTxt(String Input)
{
StringBuilder sb = new StringBuilder(Input);
sb.Replace(" ", " ");
sb.Replace("<br>", "\r\n");
sb.Replace("<br>", "\n");
sb.Replace("<br />", "\n");
sb.Replace("<br />", "\r\n");
sb.Replace("<", "<");
sb.Replace(">", ">");
sb.Replace("&", "&");
return sb.ToString();
}
// 获得当前绝对路径
/// <param name="strPath">指定的路径</param>
public static string GetMapPath(string strPath)
{
if (strPath.ToLower().StartsWith("http://"))
{
return strPath;
}
if (HttpContext.Current != null)
{
return HttpContext.Current.Server.MapPath(strPath);
}
else //非web程序引用
{
strPath = strPath.Replace("/", "\\");
if (strPath.StartsWith("\\"))
{
strPath = strPath.Substring(strPath.IndexOf(‘\\‘, 1)).TrimStart(‘\\‘);
}
return System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, strPath);
}
}
// 删除上传的文件(及缩略图)
/// <param name="_filepath"></param>
public static void DeleteUpFile(string _filepath)
{
if (string.IsNullOrEmpty(_filepath))
{
return;
}
string fullpath = GetMapPath(_filepath); //原图
if (File.Exists(fullpath))
{
File.Delete(fullpath);
}
if (_filepath.LastIndexOf("/") >= 0)
{
string thumbnailpath = _filepath.Substring(0, _filepath.LastIndexOf("/")) + "mall_" + _filepath.Substring(_filepath.LastIndexOf("/") + 1);
string fullTPATH = GetMapPath(thumbnailpath); //宿略图
if (File.Exists(fullTPATH))
{
File.Delete(fullTPATH);
}
}
}
// 文件是否存在
/// <param name="_filepath">文件相对路径</param>
public static bool FileExists(string _filepath)
{
string fullpath = GetMapPath(_filepath);
if (File.Exists(fullpath))
{
return true;
}
return false;
}
// 截取字符长度,多出部分以...代替
/// <param name="inputString">字符</param>
/// <param name="len">长度</param>
public static string CutString(string inputString, int len)
{
if (string.IsNullOrEmpty(inputString))
return "";
inputString = DropHTML(inputString);
ASCIIEncoding ascii = new 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;
}
//如果截过则加上半个省略号
byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
if (mybyte.Length > len)
tempString += "…";
return tempString;
}
//过滤SQL危险字符
/// <param name="Input"></param>
public static string Filter(string sInput)
{
if (sInput == null || sInput == "")
return null;
string sInput1 = sInput.ToLower();
string output = sInput;
string pattern = @"*|and|exec|insert|select|delete|update|count|master|truncate|declare|char(|mid(|chr(|‘";
if (Regex.Match(sInput1, Regex.Escape(pattern), RegexOptions.Compiled | RegexOptions.IgnoreCase).Success)
{
throw new Exception("字符串中含有非法字符!");
}
else
{
output = output.Replace("‘", "‘‘");
}
return output;
}
// 删除单个文件
/// <param name="_filepath">文件相对路径</param>
public static bool DeleteFile(string _filepath)
{
if (string.IsNullOrEmpty(_filepath))
{
return false;
}
string fullpath = GetMapPath(_filepath);
if (File.Exists(fullpath))
{
File.Delete(fullpath);
return true;
}
return false;
}
标签：tput bsp last pre 过滤 oid oca row ++
原文地址：http://www.cnblogs.com/Alwayswantmore/p/String_1.html
