关闭ftp流会删除c#中已上传的文件

Question

我在使用流将多个文件逐一上传到ftp时遇到问题。当我在写入流后尝试关闭流（ftpstream.close（））时，上传的文件会被删除。如果我不使用.close（），上传的文件很少，但对getstreamrequest（）的第三次调用（每次上传文件都会调用）会给出"This operation is timeout error"

 using (Stream stream = new MemoryStream(File.ReadAllBytes(fullPath)))
                        {
                            stream.Position = 0;
                            stream.Seek(0, SeekOrigin.Begin);
                            string uri = String.Format("{0}/{1}", _FTPURL, fileName);

                            FtpWebRequest request = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                            request.Credentials = new NetworkCredential(_FTPUSRNAME, _FTPPSWD);
                            request.Method = WebRequestMethods.Ftp.UploadFile;
                            request.KeepAlive = false;
                            request.UseBinary = true;
                            request.UsePassive = true;
                            request.ContentLength = stream.Length;
                            request.EnableSsl = false;
                            int bufferLength = 2048*20;
                            byte[] buffer = new byte[bufferLength];
                            int contentLength;
                            ftpStream = request.GetRequestStream();

                            contentLength = stream.Read(buffer, 0, bufferLength);
                            while (contentLength != 0)
                            {
                                ftpStream.Write(buffer, 0, contentLength);
                                contentLength = stream.Read(buffer, 0, bufferLength);
                            }                                
                        }
                     pageNo++;
                    }
                }
                ftpStream.Close();
            }
            while (!hasPaginationCompleted);    

Answer 1

我认为代码中的错误在于调用ftpStream = request.GetRequestStream();和使用ftpStream.Close(); 关闭流的地方

大量的}介于两者之间，这意味着您将在没有正确关闭它们的情况下获得多个请求流。

您可能需要在与请求相同的代码级别中关闭流。