通过OutputDataReceived事件捕获过程输出 [英] Capturing process output via OutputDataReceived event

问题描述

我试图捕捉过程输出实时（而它的运行）。我使用的代码是相当简单的（见下文）。出于某种奇怪的原因OutputDataReceived事件永远不会被调用。为什么呢？

 私人无效button2_Click（对象发件人，EventArgs五）
 {
 //安装过程启动信息
变种的ProcessStartInfo =新的ProcessStartInfo（ping.exe的，-t -n 3 192.168.100.1）
 {
 UseShellExecute =假，
 RedirectStandardOutput = TRUE 
}; 
 
 //安装的过程
 mProcess =新的Process {StartInfo的=的ProcessStartInfo，EnableRaisingEvents = TRUE}; 
 
 //注册事件
 mProcess.OutputDataReceived + = OnOutputDataReceived; 
 
 //启动过程
 mProcess.Start（）; 
 mProcess.WaitForExit（）; 
} 
 
无效OnOutputDataReceived（对象发件人，DataReceivedEventArgs E）
 {
 //不会被调用... 
} 
  

解决方案

您需要调用

  mProcess.BeginOutputReadLine（）; 
  

的 BeginOutputReadLine - 起始于应用程序的重定向StandardOutput流异步读取操作

I'm trying to capture process output in "realtime" (while it's running). The code I use is rather simple (see below). For some strange reason the OutputDataReceived event is never called. Why?

private void button2_Click(object sender, EventArgs e)
    {
      // Setup the process start info
      var processStartInfo = new ProcessStartInfo("ping.exe", "-t -n 3 192.168.100.1")
      {
        UseShellExecute = false,
        RedirectStandardOutput = true
      };

      // Setup the process
      mProcess = new Process { StartInfo = processStartInfo, EnableRaisingEvents = true };

      // Register event
      mProcess.OutputDataReceived += OnOutputDataReceived;

      // Start process
      mProcess.Start();
      mProcess.WaitForExit();
    }

    void OnOutputDataReceived(object sender, DataReceivedEventArgs e)
    {
       //Never gets called...
    }

解决方案

You need to call

mProcess.BeginOutputReadLine();

BeginOutputReadLine - "Begins asynchronous read operations on the redirected StandardOutput stream of the application."

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