使用FtpWebRequest上传文件时获取“无效的URL”
我们有一个OpenVMS（VMS）Alpha服务器，我需要访问它才能通过FTP传输文件。 问题是它在启动连接时不支持FtpWebRequest使用的命令（ ftp：//192.168.xx.xx ），除了FtpWebRequest之外还有其他任何我可以使用的FTPfunction吗？
之前我一直在Windows和Unix环境中使用我的代码，但这是我第一次在VMS操作系统上执行此操作，我也可以使用命令提示符通过FTP访问服务器。
以下是我的代码：
//Initializing ftp request ftp ftpClient = new ftp(@"ftp://192.168.xx.xx/", "username", "password"); MessageBox.Show((ftpClient.upload("FILE.TAB", @"C:\FILE.TAB")).ToString()); public ftp(string hostIP, string userName, string password) { host = hostIP; user = userName; pass = password; } public string upload(string remoteFile, string localFile) { try { /* Create an FTP Request */ ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + remoteFile); /* Log in to the FTP Server with the User Name and Password Provided */ ftpRequest.Credentials = new NetworkCredential(user, pass); ///* When in doubt, use these options */ ftpRequest.UseBinary = false; ftpRequest.UsePassive = true; ftpRequest.KeepAlive = true; /* Specify the Type of FTP Request */ ftpRequest.Method = WebRequestMethods.Ftp.UploadFile; /* Establish Return Communication with the FTP Server */ ftpResponse = (FtpWebResponse)ftpRequest.GetResponse(); ftpStream = ftpRequest.GetRequestStream(); /* Open a File Stream to Read the File for Upload */ FileStream localFileStream = new FileStream(localFile, FileMode.Open); /* Buffer for the Downloaded Data */ byte[] byteBuffer = new byte[bufferSize]; int bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize); /* Upload the File by Sending the Buffered Data Until the Transfer is Complete */ while (bytesSent != 0) { ftpStream.Write(byteBuffer, 0, bytesSent); bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize); } /* Resource Cleanup */ localFileStream.Close(); ftpStream.Close(); ftpRequest = null; return "0"; } catch (Exception ex) { return ex.ToString(); } //return 1; }
我在上面的代码上得到的错误是“无效的URL ….”。
当我尝试在浏览器上运行它时出现的错误： 
但我可以使用Windows中常用的cmd命令进行连接： 
有什么建议？？
该URL没有表单
ftp://192.168.xx.xx:FILE.TAB
但
ftp://192.168.xx.xx/FILE.TAB
请参阅https://en.wikipedia.org/wiki/URL