没有连接到ftp使用c＃

我可以创建一个文件夹，我可以重命名该文件，但我无法上传和下载文件到ftp。显示的异常是System.Net.WebException：远程服务器返回错误：（500）语法错误，命令无法识别。没有连接到ftp使用c＃

任何人都有一个想法，为什么？

日志文件： System.Net Information: 0 : [6112] FtpControlStream#7746814 - Resposta recebida [500 PORT/EPRT (Active Mode/Extended Active Mode) is not supported. Use PASV/EPSV instead of this] System.Net Information: 0 : [6112] FtpWebRequest#30923613::(Liberando a conexão de FTP#7746814.) System.Net Error: 0 : [6112] Exceção em FtpWebRequest#30923613::GetRequestStream - O servidor remoto retornou um erro: (500) Erro de sintaxe, comando não reconhecido.

代码：

/* Upload File */ 
public void 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 = true; 
     ftpRequest.UsePassive = false; 
     ftpRequest.KeepAlive = true; 

     /* Specify the Type of FTP Request */ 
     ftpRequest.Method = WebRequestMethods.Ftp.UploadFile; 
     /* Establish Return Communication with the FTP Server */ 
     Stream 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; 
}

来源

2017-06-01 Thiago Schulz

的可能的复制[定影 - System.Net.WebException：远程服务器返回错误：（500）语法错误，不可识别的命令（https://stackoverflow.com/questions/21221300/fixing-system-net- webexception-the-remote-server-returned-an-error-500-syn） –

Ie使用'ftpRequest.UsePassive = true;'，除非你有一个非常好的**理由不要。 –

如果我使用ftpRequest.UsePassive = true;显示的异常是：远程服务器返回一个错误：227进入被动模式（201,23,75,26,225,86） –

我的问题是，挡住通信端口卡巴斯基杀毒。

来源

2017-06-02 14:43:59

请不要发布重复的答案：https://stackoverflow.com/a/24261401/850848 - 你应该用Google搜索答案，提问前！ –

没有连接到ftp使用c＃

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