Process.OutputDataReceived 是在哪个线程上引发和处理的？
我有一个多线程 winforms 应用程序。一个线程用于 GUI，一个线程用于后台处理。在后台处理中，我通过 Process 类与外部进程通信以发送接收数据。
我对我注册的 Process.OutputDataReceived 处理程序在哪个线程上运行感到困惑。根据 MS 文档：“OutputDataReceived 事件表明关联的进程已写入其重定向的 StandardOutput 流。”但尚不清楚是谁发起了这一事件。
请参见下面的示例代码：
myProc= new Process();
myProc.StartInfo.UseShellExecute = false;
myProc.StartInfo.RedirectStandardOutput = true;
myProc.StartInfo.RedirectStandardError = true;
myProc.StartInfo.RedirectStandardInput = true;
myProc.StartInfo.FileName = "myapp.exe";
myProc.StartInfo.Arguments = arguments;
myProc.StartInfo.CreateNoWindow = true;
myProc.OutputDataReceived += new DataReceivedEventHandler(DataReceivedFromProc);
myProc.ErrorDataReceived += new DataReceivedEventHandler(ErrorReceivedFromProc);
myProc.Start();
myOutputStream = myProc.StandardInput;
myProc.BeginOutputReadLine();
myProc.BeginErrorReadLine();
那么在这种情况下，DataReceivedFromProc 在哪个线程上运行？如果上面的代码在我的 GUI 线程和工作线程上执行，会有什么不同吗？
I have a multi-threaded winforms application. One thread for the GUI, and one thread for background processing. In the background processing, I communicate with an external process via the Process class to send an receive data.
I am confused about what thread the handler that I registered Process.OutputDataReceived is run on. According to MS documentation: "The OutputDataReceived event indicates that the associated Process has written to its redirected StandardOutput stream." But it isn't clear who is raising the event.
See example code below:
myProc= new Process();
myProc.StartInfo.UseShellExecute = false;
myProc.StartInfo.RedirectStandardOutput = true;
myProc.StartInfo.RedirectStandardError = true;
myProc.StartInfo.RedirectStandardInput = true;
myProc.StartInfo.FileName = "myapp.exe";
myProc.StartInfo.Arguments = arguments;
myProc.StartInfo.CreateNoWindow = true;
myProc.OutputDataReceived += new DataReceivedEventHandler(DataReceivedFromProc);
myProc.ErrorDataReceived += new DataReceivedEventHandler(ErrorReceivedFromProc);
myProc.Start();
myOutputStream = myProc.StandardInput;
myProc.BeginOutputReadLine();
myProc.BeginErrorReadLine();
So in this case, what thread is DataReceivedFromProc run on? Does it make a difference if the above is executed on my GUI thread vs worker thread?
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您应该设置
myProc.SynchronizingObject属性 添加到您的窗体或控件。否则，我相信该事件将在 IO 完成线程（来自线程池）上引发。
You should set the
myProc.SynchronizingObjectproperty to your form or control.Otherwise, I believe the event will be raised on an IO completion thread (from the ThreadPool).
另请参阅 此页面：
Also see the user comment at the very bottom of this page: