FTP上传

 if (File.Exists(fileName))
                {
                    FileInfo fileInf = new FileInfo(fileName);
                    string uri = FtpUrl + "/" + fileInf.Name;
                    //FTP
                    FtpLink = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                    FtpLink.UseBinary = true;
                    FtpLink.Credentials = new NetworkCredential(FtpUserName, FtpUserPwd);
                    FtpLink.KeepAlive = false;
                    FtpLink.Method = WebRequestMethods.Ftp.UploadFile;
                    FtpLink.ContentLength = fileInf.Length;

                    int BuffLength = 2048;
                    byte[] buff = new byte[BuffLength];
                    int contentLen;
                    FileStream fs = fileInf.OpenRead();
                    try
                    {
                        Stream strm = FtpLink.GetRequestStream();
                        logger.Trace(DateTime.Now + ",Ftp:文件总大小：" + fileInf.Length / 1024 + "k");
                        contentLen = fs.Read(buff, 0, BuffLength);
                        int OKlen = 0;
                        while (contentLen != 0)
                        {

                            strm.Write(buff, 0, contentLen);
                            OKlen += contentLen;

                            //Logger.WriteInfo(FtpName, DateTime.Now.ToString() + ",Ftp:文件总大小：" + fileInf.Length / 1024 + "k，已经上传： " + OKlen / 1024 + "k");
                            contentLen = fs.Read(buff, 0, BuffLength);
                        }
                        strm.Close();
                        fs.Close();
                        logger.Trace(DateTime.Now + ":上传完毕");
                        File.Delete(fileName);

                    }
                    catch (Exception ex)
                    {
                        logger.Error(DateTime.Now + ":" + ex.Message);
                    }
                }