在ftp二進制文件上載XML文件

Question

我有代碼，我將xml文件發送到ftp服務器，但是ftp服務器上的文件大小小於原始文件。 我正在嘗試啟用二進制傳輸，但結果仍然相同。

FileInfo f = new FileInfo("C:\\Users\\L\\Desktop\\data.xml");
            long original_vel = f.Length; 
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://***");
            request.UseBinary = true;
            request.Method = WebRequestMethods.Ftp.GetFileSize;
            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential("*****", "*****");

            StreamReader sourceStream = new StreamReader(@"C:\\Users\\L\\Desktop\\data.xml");
            byte[] fileContents = Encoding.Unicode.GetBytes(sourceStream.ReadToEnd());
            sourceStream.Close();
            request.ContentLength = fileContents.Length;
            long ftp_vel = request.ContentLength;      
            Stream requestStream = request.GetRequestStream();
            requestStream.Write(fileContents, 0, fileContents.Length);
            requestStream.Close();
            FtpWebResponse response = (FtpWebResponse)request.GetResponse();
            if (original_vel == ftp_vel)
            {
                response.Close();   
            }
            else
            {                
                Odesilani();
            }

原始文件的大小為294 672，但ftp The xml file on ftp is valid....But when i compare files in total comander, the original file have: FF FE 3C 00 3F 00.....and the file on ftp have 3C 00 3F 00...但是文件的內容還可以...：/您知道嗎？

Answer 1

服務器上的XML文件有效嗎？ 從代碼中，您正在使用Unicode讀取文件。 使用unicode編碼的文件通常具有一個字符，該字符位於文件的開頭，稱為字節順序標記 。 這可能是您在轉換過程中丟失2字節差異的原因。

更新通過Encoding.GetPreamble()給出任何編碼的正確字節順序標記。

  StreamReader sourceStream = new StreamReader(@"C:\\\\Users\\\\L\\\\Desktop\\\\data.xml"); //Get Preamble and File Contents byte[] bom = Encoding.Unicode.GetPreamble(); byte[] content = Encoding.Unicode.GetBytes(sourceStream.ReadToEnd()); //Create Destination array byte[] fileContents = new Byte[bom.Length + content.Length]; //Copy arrays into destination appending bom if available Array.Copy(bom, 0, fileContents, 0, bom.Length); Array.Copy(content, 0, fileContents, bom.Length, content.Length); request.ContentLength = fileContents.Length; long ftp_vel = request.ContentLength; Stream requestStream = request.GetRequestStream(); requestStream.Write(fileContents, 0, fileContents.Length); requestStream.Close(); FtpWebResponse response = (FtpWebResponse)request.GetResponse(); if (original_vel == ftp_vel) { response.Close(); } else { Odesilani(); }