web上传客户端文件到FTP

 //上传文件到FTP

 public void UpLoadFileToFTP()

        {

  FtpWebRequest reqFTP;

  // 根据uri创建FtpWebRequest对象

  reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpUrl + strFtpFileName));

  // ftp用户名和密码

  reqFTP.Credentials = new NetworkCredential(strFtpAccount, strFtpPassword);

  // 默认为true，连接不会被关闭

  // 在一个命令之后被执行

  reqFTP.KeepAlive = false;

  // 指定执行什么命令

  reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

  // 指定数据传输类型

  reqFTP.UseBinary = true;

  //reqFTP.Timeout = 36000;

  // 上传文件时通知服务器文件的大小

  reqFTP.ContentLength = fuClientFileUpload.PostedFile.ContentLength;

  // 缓冲大小设置为10kb

  int buffLength = 10240;//2048

  byte[] buff = new byte[buffLength];

  int contentLen;

  // 打开一个文件流 (System.IO.FileStream) 去读上传的文件

  //FileStream fs = fileInf.OpenRead();

  Stream fs = fuClientFileUpload.PostedFile.InputStream;

  try

  {

   // 把上传的文件写入流

   Stream strm = reqFTP.GetRequestStream();

   // 每次读文件流的2kb

   contentLen = fs.Read(buff, 0, buffLength);

   // 流内容没有结束

   while (contentLen != 0)

   {

    // 把内容从file stream 写入 upload stream

    strm.Write(buff, 0, contentLen);

    contentLen = fs.Read(buff, 0, buffLength);

   }

   // 关闭两个流

   strm.Close();

   fs.Close();

  }

  catch (Exception ex)

  {

   throw ex;

  }

        }

        //删除Ftp文件 (在更新数据的同时将Ftp上的文件删除)

        public void DeleteFtpFile(string strFileName)

        {

  Uri uri = new Uri(strFtpUrl + strFileName);

  FtpWebRequest listRequest = (FtpWebRequest)WebRequest.Create(uri);

  listRequest.Method = WebRequestMethods.Ftp.DeleteFile;

  listRequest.Credentials = new NetworkCredential(strFtpAccount, strFtpPassword);

  FtpWebResponse listResponse = (FtpWebResponse)listRequest.GetResponse();

        }

        //下载ftp文档

        public void DownLoadFtpFile(string strFtpFileName)

        {

  string strFtpURL = ParameterUtil.GetSysParameterValue("ONLINENEWSFTPURL"); //在線新聞上傳FTP地址

  string strFtpUserId = ParameterUtil.GetSysParameterValue("ONLINENEWSFTPACCOUNT"); //FTP用户id

  string strFtpUserPwd = ParameterUtil.GetSysParameterValue("ONLINENEWSFTPPWD"); //FTP用户密码

  Uri uri = new Uri("ftp://10.127.0.1 ");

  WebClient request = new WebClient();

  request.Credentials = new NetworkCredential(strFtpUserId, strFtpUserPwd);

  byte[] newFileData = request.DownloadData(uri.ToString());

  FileStream fs = new FileStream(@"d:/abc.txt", FileMode.OpenOrCreate, FileAccess.Write);

  fs.Write(newFileData, 0, newFileData.Length);

  fs.Close();

        }

 //检查文件是否存在

 public bool IsFileExist(string strFileName)

        {

  FtpWebRequest reqFTP;

  try

  {

   reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpUrl + strFileName));

   reqFTP.UseBinary = true;

   reqFTP.Credentials = new NetworkCredential(strFtpAccount, strFtpPassword);

   reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;// WebRequestMethods.Ftp.ListDirectory;

   WebResponse response = reqFTP.GetResponse();

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

                 string line = reader.ReadLine();

                 if (line.Length > 0)

                 {

                      return true;

                 }

                 else

                 {

                      return false;

                 }

             }

             catch (Exception ex)

             {

                 return false;

             }

        }

        //重命名文件

        private bool fileRename(string currentFileName, string newFileName)

        {

  bool success = false;

  FtpWebRequest ftpWebRequest = null;

  FtpWebResponse ftpWebResponse = null;

  Stream ftpResponseStream = null;

  try

  {

   string uri = strFtpUrl + currentFileName;

   ftpWebRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

   ftpWebRequest.Credentials = new NetworkCredential(strFtpAccount, strFtpPassword);

   ftpWebRequest.UseBinary = true;

   ftpWebRequest.Method = WebRequestMethods.Ftp.Rename;

   ftpWebRequest.RenameTo = newFileName;

   ftpWebResponse = (FtpWebResponse)ftpWebRequest.GetResponse();

   ftpResponseStream = ftpWebResponse.GetResponseStream();

   success = true;

             }

             catch (Exception)

             {

                 success = false;

             }

             finally

             {

                 if (ftpResponseStream != null)

                 {

                      ftpResponseStream.Close();

                 }

                 if (ftpWebResponse != null)

                 {

                      ftpWebResponse.Close();

                 }

             }

         return success;

        }

        // 文件存在检查

        public bool fileCheckExist(string ftpName)

        {

  bool success = false;

  FtpWebRequest ftpWebRequest = null;

  WebResponse webResponse = null;

  StreamReader reader = null;

  try

  {

   string url = strFtpUrl;

   ftpWebRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));

   ftpWebRequest.Credentials = new NetworkCredential(strFtpAccount, strFtpPassword);

   ftpWebRequest.Method = WebRequestMethods.Ftp.ListDirectory;

   ftpWebRequest.KeepAlive = false;

   webResponse = ftpWebRequest.GetResponse();

   reader = new StreamReader(webResponse.GetResponseStream(), System.Text.Encoding.Default);

   string line = reader.ReadLine();

   while (line != null)

   {

    if (line == ftpName)

    {

     success = true;

     break;

    }

    line = reader.ReadLine();

   }

  }

  catch (Exception)

  {

   success = false;

  }

  finally

  {

   if (reader != null)

   {

    reader.Close();

   }

   if (webResponse != null)

   {

    webResponse.Close();

   }

  }

  return success;

 }

 本文转自：http://blog.csdn.net/zhang_kevin_wei/article/details/5575650