process.OutputDataReceived不是從CMD</p> <pre><code>C:\Users\XXXXX>adb start-server * daemon not running. starting it now * * daemon started successfully * C:\Users\XXXXX> </code></pre> <p>我的C＃代碼讀取所有行

Question

結果。

public string devicesPlus() 
{ 
    psi.Arguments = "start-server"; 
    call = Process.Start(psi); 
    call.OutputDataReceived += new DataReceivedEventHandler(call_OutputDataReceived); 
    call.ErrorDataReceived += new DataReceivedEventHandler(call_OutputDataReceived); 
    call.EnableRaisingEvents = true; 
    call.Exited += new EventHandler(call_Exited); 
    call.Start(); 
    call.BeginOutputReadLine(); 
    call.BeginErrorReadLine(); 
    call.StandardInput.Close(); 
    call.WaitForExit(); 
    return outData.ToString(); 
} 

private void call_OutputDataReceived(object sender, DataReceivedEventArgs e) 
{ 
    if (e.Data != null) 
    { 
     outData.Append(e.Data); 
    } 
} 

現在，當我打電話給devicesPlus時，有一段時間我只有*守護進程沒有運行。現在開始它* 有一段時間，它只是在後臺工作，沒有結果.. 你能告訴我什麼是錯誤的代碼，爲什麼我沒有得到正確的返回像cmd .. 新的C＃對不起英語不好。 ..

更新 如果我從我的應用程序外殺死adb我突然從我的軟件得到答覆。

Answer 1

添加這些行也可以參考StandardError stream：

psi.Arguments = "start-server"; 
psi.UseShellExecute = false; 
psi.RedirectStandardError = true; 
psi.RedirectStandardOutput = true; 

call = Process.Start(psi); 
call.OutputDataReceived += new DataReceivedEventHandler(call_OutputDataReceived); 
call.ErrorDataReceived += new DataReceivedEventHandler(call_OutputDataReceived); 
call.Exited += new EventHandler(call_Exited); 

call.EnableRaisingEvents = true; 

call.BeginOutputReadLine(); 
call.BeginErrorReadLine(); 
call.StandardInput.Close(); 

call.WaitForExit(); 

return outData.ToString(); 

Answer 2

WaitForExit()只等待進程退出。它不會等待您的流程接收所有輸出，因此您在那裏遇到競爭情況。

call_OutputDataReceived將被調用e.Data == null來表示輸出結束。在使用outData.ToString()之前，您需要等待該呼叫。

例如，你可以使用一個new CountdownEvent(2)等待兩個流的末尾：

CountdownEvent countdownEvent; 

    public string devicesPlus() 
    { 
     psi.Arguments = "start-server"; 
     countdownEvent = new CountdownEvent(2); 
     call = Process.Start(psi); 
     call.OutputDataReceived += new DataReceivedEventHandler(call_OutputDataReceived); 
     call.ErrorDataReceived += new DataReceivedEventHandler(call_OutputDataReceived); 
     call.EnableRaisingEvents = true; 
     call.Exited += new EventHandler(call_Exited); 
     call.Start(); 
     call.BeginOutputReadLine(); 
     call.BeginErrorReadLine(); 
     call.StandardInput.Close(); 
     call.WaitForExit(); 
     countdownEvent.Wait(); 
     return outData.ToString(); 
    } 

    private void call_OutputDataReceived(object sender, DataReceivedEventArgs e) 
    { 
     if (e.Data != null) 
     { 
      // prevent race condition when data is received form stdout and stderr at the same time 
      lock (outData) 
      { 
       outData.Append(e.Data); 
      } 
     } 
     else 
     { 
      // end of stream 
      countdownEvent.AddCount(); 
     } 
    }