FTP上载文件使用HTTP代理时不支持请求的FTP命令

有人可以看看下面的代码并告诉我我做错了什么。 我只是在圈子里，任何指针都非常感激

public class FtpWebRequestUtil { private static string RemoteHost; private static string RemoteFtpPath; public static NetworkCredential Credential = new NetworkCredential(); public FtpWebRequestUtil() { } public FtpWebRequestUtil(string RemoteAddress, string RemotePath, string RemoteUser, string RemotePwd) { Credential.UserName = RemoteUser; Credential.Password = RemotePwd; RemoteHost = RemoteAddress; RemoteFtpPath = RemotePath; } public string UploadFile(string localFilePath) { int startTime = Environment.TickCount; // Console.WriteLine("Uploading File " + localFilePath); try { FileInfo localFile = new FileInfo(localFilePath); //eg: c:\Test.txt byte[] buf = new byte[2048]; int iWork; string remoteFile = "ftp://" + RemoteHost + "/" + RemoteFtpPath + "/" + localFile.Name; FtpWebRequest req = (FtpWebRequest) FtpWebRequest.Create(remoteFile); // req.Proxy = req.Credentials = Credential; // FtpWebRequest req = (FtpWe req.UseBinary = true; req.KeepAlive = true; req.Method = WebRequestMethods.Ftp.UploadFile; StreamWriter myStreamWriter = new StreamWriter(req.GetRequestStream()); myStreamWriter.Write(new StreamReader("TestFiles\" + localFile.Name).ReadToEnd()); myStreamWriter.Close(); FtpWebResponse myFtpWebResponse = (FtpWebResponse) req.GetResponse(); Console.WriteLine("Upload File Complete, status: " + myFtpWebResponse.StatusDescription); myFtpWebResponse.Close(); return "SUCCESS"; } catch (Exception ex) { Console.WriteLine("There was an error connecting to the FTP Server."); Console.WriteLine(ex.Message); throw ex; } Console.WriteLine("Time taken for downloading file is " + (Environment.TickCount - startTime).ToString()); return "FAILURE"; } ************************ ********************************* FtpWebRequestUtil ftpClient = new FtpWebRequestUtil(FtpUrl, InputFolder, FtpUser, FtpPassword); try { Thread.Sleep(5000); ftpClient.UploadFile(UploadingFileName); } catch (Exception exception) { Assert.Fail(exception.Message); } finally { ftpClient = null; } } } 

 req.Proxy = new WebProxy(); // initialize this FtpWebRequest property 

 request.Proxy = null;