重定向输出时 ResGen.exe 卡住

发布于 2024-10-24 09:41:27 字数 468 浏览 1 评论 0原文

我尝试从 ResGen.exe 重定向标准输出。我使用以下代码

ProcessStartInfo psi = new ProcessStartInfo( "resxGen.exe" );
psi.CreateNoWindow = true;
psi.Arguments = sb.ToString();
psi.UseShellExecute = false;
psi.RedirectStandardOutput = true;
Process p = Process.Start( psi );
p.WaitForExit();
StreamReader sr = p.StandardOutput;
string message = p.StandardOutput.ReadToEnd();

它卡在 p.WaitForExit 上。当我关闭输出流重定向并且不读取 StandardOutput 时，它可以正常工作。

我做错了什么？

原文

I try to redirect standard output from ResGen.exe. I use following code

ProcessStartInfo psi = new ProcessStartInfo( "resxGen.exe" );
psi.CreateNoWindow = true;
psi.Arguments = sb.ToString();
psi.UseShellExecute = false;
psi.RedirectStandardOutput = true;
Process p = Process.Start( psi );
p.WaitForExit();
StreamReader sr = p.StandardOutput;
string message = p.StandardOutput.ReadToEnd();

It stuck on p.WaitForExit. When I turn off output stream redirection and do not read StandardOutput it works correctly.

What do I do wrong ?

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零時差 2024-10-31 09:41:27

读取流后，您需要等待进程结束，否则代码中会出现死锁。
问题是您的父进程正在阻塞等待子进程完成，而子进程正在等待父进程读取输出，因此出现死锁。

这里是关于问题。

像这样更改代码应该可以避免死锁：

StreamReader sr = p.StandardOutput;
string message = p.StandardOutput.ReadToEnd();
p.WaitForExit();

You would need to wait for the process to end after reading the stream, otherwise you have a deadlock in your code.
The problem is that your parent process is blocking waiting for the child process to finish, and the child process is waiting for the parent process to read the output, hence you have a deadlock.

Here is a good and detailed description of the problem.

Changing your code like this should avoid the deadlock:

StreamReader sr = p.StandardOutput;
string message = p.StandardOutput.ReadToEnd();
p.WaitForExit();

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分开我的手 2024-10-31 09:41:27

底线似乎是 p.WaitForExit 的位置不正确；仅应在从流中读取所需内容后才进行此方法调用。

来自 MSDN：

 // Start the child process.
 Process p = new Process();
 // Redirect the output stream of the child process.
 p.StartInfo.UseShellExecute = false;
 p.StartInfo.RedirectStandardOutput = true;
 p.StartInfo.FileName = "Write500Lines.exe";
 p.Start();
 // Do not wait for the child process to exit before
 // reading to the end of its redirected stream.
 // p.WaitForExit();
 // Read the output stream first and then wait.
 string output = p.StandardOutput.ReadToEnd();
 p.WaitForExit();

另请注意，您使用StreamReader sr = p.StandardOutput 在这里是多余的，因为当设置 message 的值时，您可以使用 p.StandardOutput.ReadToEnd(); 访问流> - 请注意 p.StandardOutput，而不是 sr.ReadToEnd()。

The bottom line would seem to be that the placement of p.WaitForExitis incorrect; this method call should be made only after reading what you want from the stream.

From MSDN:

 // Start the child process.
 Process p = new Process();
 // Redirect the output stream of the child process.
 p.StartInfo.UseShellExecute = false;
 p.StartInfo.RedirectStandardOutput = true;
 p.StartInfo.FileName = "Write500Lines.exe";
 p.Start();
 // Do not wait for the child process to exit before
 // reading to the end of its redirected stream.
 // p.WaitForExit();
 // Read the output stream first and then wait.
 string output = p.StandardOutput.ReadToEnd();
 p.WaitForExit();

Also note that your use of StreamReader sr = p.StandardOutput is redundant here since when the value ofmessage is set you access the stream using p.StandardOutput.ReadToEnd(); - note the p.StandardOutput as opposed to sr.ReadToEnd().

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