FTP上傳0字節

Question

形勢

我有一些代碼，在這種情況下上傳一個文件，通常的.csv到遠程FTP站點

代碼

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 = false; 
     ftpRequest.KeepAlive = true; 
     /* Specify the Type of FTP Request */ 
     ftpRequest.Method = WebRequestMethods.Ftp.UploadFile; 
     /* Establish Return Communication with the FTP Server */ 
     ftpStream = ftpRequest.GetRequestStream(); 
     /* Open a File Stream to Read the File for Upload */ 
     FileStream localFileStream = new FileStream(localFile, FileMode.Create); 
     /* 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 */ 
     try 
     { 
      while (bytesSent != 0) 
      { 
       ftpStream.Write(byteBuffer, 0, bytesSent); 
       bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize); 
      } 
     } 
     catch (Exception ex) { Console.WriteLine(ex.ToString()); } 
     /* Resource Cleanup */ 
     localFileStream.Close(); 
     ftpStream.Close(); 
     ftpRequest = null; 
    } 
    catch (Exception ex) { Console.WriteLine(ex.ToString()); } 
    return; 
} 

問題

該程序使連接成功並且似乎上傳我的文件，但.csv爲空，文件大小爲0字節。我的代碼中是否有可能導致此問題的任何內容？

Answer 1

您是否發現本地文件被截斷爲0字節？我認爲這個問題是在這裏：

FileStream localFileStream = new FileStream(localFile, FileMode.Create); 

你應該FileMode.Open或FileMode.OpenOrCreate來打開該文件。 documentation for FileMode.Create指出「如果文件已經存在，它將被覆蓋。」和「FileMode.Create相當於請求如果文件不存在，請使用CreateNew;否則，使用截斷」。