FTP上传的代码

FileInfo fileInf = new FileInfo(System.Environment.UserName + ".txt");
            string Url = ftp的URL+文件名
            FtpWebRequest reqFtp;

            reqFtp = (FtpWebRequest)FtpWebRequest.Create(new Uri(Url));

            reqFtp.Credentials = new NetworkCredential(ftp的用户名,ftp密码);

            reqFtp.KeepAlive = false;

            reqFtp.Method=WebRequestMethods.Ftp.UploadFile;

            reqFtp.UseBinary = true;

            reqFtp.UsePassive = false;
            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();
                //fileInf.Delete();
            }