SSIS 学习之旅 FTP访问类

        #region 连接FTP服务器
        /// <summary>  
        /// 连接FTP服务器
        /// </summary>  
        /// <param name="FtpServerIP">FTP连接地址</param>  
        /// <param name="FtpRemotePath">指定FTP连接成功后的当前目录, 如果不指定即默认为根目录</param>  
        public string FTPHelper(string FtpServerIP, string FtpRemotePath)
        {
            string ftpURI = "ftp://" + FtpServerIP + "/" + FtpRemotePath + "/";
            return ftpURI;
        }

        #endregion

        #region 文件上传FTP服务器
        /// <summary>
        /// 上传
        /// </summary>
        /// <param name="FilePathPendingAndName">文件详细路径</param>
        /// <param name="FTPUrl">FTPUrl</param>
        /// <param name="FTP_UserName">用户名</param>
        /// <param name="FTP_PWD">密码</param>
        public void Upload(string FilePathPendingAndName, string FTPUrl, string FTP_UserName, string FTP_PWD)
        {
            FileInfo fileInf = new FileInfo(FilePathPendingAndName);
            FtpWebRequest reqFTP;
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(FTPUrl + fileInf.Name));
            reqFTP.Credentials = new NetworkCredential(FTP_UserName, FTP_PWD);
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            reqFTP.KeepAlive = false;
            reqFTP.UseBinary = true;
            reqFTP.ContentLength = fileInf.Length;
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            FileStream fs = fileInf.OpenRead();
            try
            {
                Stream strm = reqFTP.GetRequestStream();
                contentLen = fs.Read(buff, 0, buffLength);
                while (contentLen != 0)
                {
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                strm.Close();
                fs.Close();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

      #endregion


        

        #region 下载文件
        /// <summary>
        /// 下载文件
        /// </summary>
        /// <param name="filePath">本地路径</param>
        /// <param name="fileName">文件名</param>
        /// <param name="ftpUrl">FTP链接路径</param>
        /// <param name="FTP_UserName">用户名</param>
        /// <param name="FTP_PWD">密码</param>
        public void Download(string filePath, string fileName, string ftpUrl, string FTP_UserName, string FTP_PWD)
        {
            try
            {
                FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);
                FtpWebRequest reqFTP;

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpUrl + fileName));
                reqFTP.Credentials = new NetworkCredential(FTP_UserName, FTP_PWD);
                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                reqFTP.UseBinary = true;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
        #endregion


     #region 删除文件
        /// <summary> 
        /// 删除文件 
        /// </summary> 
        public void Delete(string fileName)
        {
            try
            {
                FtpWebRequest reqFTP;
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileName));
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                reqFTP.KeepAlive = false;
                string result = String.Empty;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                long size = response.ContentLength;
                Stream datastream = response.GetResponseStream();
                StreamReader sr = new StreamReader(datastream);
                result = sr.ReadToEnd();
                sr.Close();
                datastream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
     #endregion

    #region 获取当前目录下文件列表(不包括文件夹)
        /// <summary>
        /// 获取当前目录下文件列表(不包括文件夹)
        /// </summary>
        /// <param name="url">连接FTP服务器地址</param>
        /// <param name="ftpUserName">用户名</param>
        /// <param name="ftpPassword">密码</param>
        /// <returns></returns>
        public string[] GetFileList(string url, string ftpUserName, string ftpPassword)
        {
            StringBuilder result = new StringBuilder();
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserName, ftpPassword);

                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

                WebResponse response = reqFTP.GetResponse();

                StreamReader reader = new StreamReader(response.GetResponseStream());

                string line = reader.ReadLine();

                string FileName = "";
                while (line != null)
                {

                    if (line.IndexOf("<DIR>") == -1)
                    {
                        FileName = "";
                        FileName =  Regex.Match(line, @"(?<=IN)([.\S\s]*)(?=csv)", RegexOptions.IgnoreCase).Value.ToString() ;
                        if (FileName.Trim() != "")
                        {
                            FileName = "IN" + FileName + "csv";
                            result.Append(FileName + "|");
                        }
                    }
                    line = reader.ReadLine();
                }
                //result.Remove(result.ToString().LastIndexOf(‘\n‘), 1);
                reader.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                throw (ex);
            }
            return result.ToString().Split(‘|‘);
        }

        #endregion

        #region 判断当前目录下指定的文件是否存在
        /// <summary>  
        /// 判断当前目录下指定的文件是否存在  
        /// </summary>  
        /// <param name="RemoteFileName">远程文件名</param> 
        public bool FileExist(string FTPUrl, string RemoteFileName, string FTP_UserName, string FTP_PWD)
        {

            string FileName = "IN_NORMAL_" + Regex.Match(RemoteFileName, @"(?<=IN_NORMAL_)([.\S\s]*)(?=csv)", RegexOptions.IgnoreCase).Value.ToString() + "csv"; 

            string[] fileList = GetFileList(FTPUrl, FTP_UserName, FTP_PWD);
            foreach (string str in fileList)
            {
                if (str.Trim()==FileName.Trim())
                {
                    return true;
                }
            }
            return false;
        }
        #endregion


        #region 更改文件名
        /// <summary>  
        /// 更改文件名  
        /// </summary> 
        /// <param name="currentFilename">现有文件名称</param>
        /// <param name="newDirectory">新的文件名称</param>
        /// <param name="FTPUrl">FTPUrl</param>
        /// <param name="FTP_UserName">用户名</param>
        /// <param name="FTP_PWD">密码</param>
        public void ReName(string currentFilename, string newFilename, string FTPUrl, string FTP_UserName, string FTP_PWD)
        {
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(FTPUrl + currentFilename));
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                reqFTP.UseBinary = true;
                
                reqFTP.Credentials = new NetworkCredential(FTP_UserName, FTP_PWD);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                //File.Move()
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            { }
        }

        #endregion

        #region 移动文件夹
        /// <summary>
        /// 移动文件夹
        /// </summary>
        /// <param name="currentFilename">现有文件名称</param>
        /// <param name="newDirectory">新的文件名称</param>
        /// <param name="FTPUrl">FTPUrl</param>
        /// <param name="FTP_UserName">用户名</param>
        /// <param name="FTP_PWD">密码</param>
        public void MovieFile(string currentFilename, string newDirectory,string FTPUrl, string FTP_UserName, string FTP_PWD)
        {
            ReName(currentFilename, newDirectory, FTPUrl, FTP_UserName, FTP_PWD);
        }
        #endregion


    #region 创建文件夹 
        /// <summary> 
        /// 创建文件夹 
        /// </summary>  
        public void MakeDir(string dirName)
        {
            FtpWebRequest reqFTP;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + dirName));
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            { }
        }
     #endregion

    #region 获取指定文件大小 
        /// <summary> 
        /// 获取指定文件大小 
        /// </summary> 
        public long GetFileSize(string filename)
        {
            FtpWebRequest reqFTP;
            long fileSize = 0;
            try
            {
                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + filename));
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
                reqFTP.UseBinary = true;
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                fileSize = response.ContentLength;
                ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            { }
            return fileSize;
        }
    #endregion