使用FTPWebRequest上传期间“请求的URI无效”

我尝试将文件上传到FTP服务器上的目录。 我在FtpWebRequest使用了这个方法。 我想将一个文件上传到该用户的主目录，但我总是收到以下错误消息：

请求的URI对此FTP命令无效。

有什么问题？ 我试过关闭被动模式，但它仍然是一样的。

 static void FtpUpload() { // Get the object used to communicate with the server. FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://12.22.44.45"); request.Method = WebRequestMethods.Ftp.UploadFile; request.UsePassive = false; // This example assumes the FTP site uses anonymous logon. request.Credentials = new NetworkCredential("pokus", "password"); // Copy the contents of the file to the request stream. StreamReader sourceStream = new StreamReader(path); byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd()); sourceStream.Close(); request.ContentLength = fileContents.Length; Stream requestStream = request.GetRequestStream(); requestStream.Write(fileContents, 0, fileContents.Length); requestStream.Close(); FtpWebResponse response = (FtpWebResponse)request.GetResponse(); Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription); response.Close(); } 

 FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://12.22.44.45/myNewFile.dat");