C# - 如何在进程退出时关闭标准输入和输出流？

发布于 2024-09-14 05:55:52 字数 1018 浏览 4 评论 0原文

我有一个进程需要启动子进程并通过标准输入和输出与其进行通信。子进程应该能够自动终止；但是，我无法正确关闭流。

这是子进程/“客户端”进程的相关代码：

// This is started in a separate thread
private void watchStandardInput() {
    string line = null;
    do {
        try {
            line = Console.ReadLine();
        } catch (IOException) {
            return;
        }
        lock (inputWatcher) {
            switch (line) {
                // process command
            }
        }
    } while (line != null);
}

// This is called from the main thread
private void updateStatus(string statusMessage) {
    lock (inputWatcher) {
        Console.WriteLine(statusMessage);
    }
}

这是“服务器”代码：

// This is in the main thread
using (StreamReader sr = process.StandardOutput) {
    while (!process.HasExited) {
        processOutput(sr.ReadLine());
    }
}

// Finally, commands are sent in a separate thread.

现在解决我遇到的问题：当子进程应该退出时，服务器停留在 sr.ReadLine () 并且客户端停留在 Console.ReadLine() 处。我做错了什么？

原文

I have a process that needs to launch a child process and communicate with it through standard input and output. The child process should be able to automatically terminate itself; however, I am having trouble closing the streams properly.

Here is the relevant code from the child / "client" process:

// This is started in a separate thread
private void watchStandardInput() {
    string line = null;
    do {
        try {
            line = Console.ReadLine();
        } catch (IOException) {
            return;
        }
        lock (inputWatcher) {
            switch (line) {
                // process command
            }
        }
    } while (line != null);
}

// This is called from the main thread
private void updateStatus(string statusMessage) {
    lock (inputWatcher) {
        Console.WriteLine(statusMessage);
    }
}

And here's the "server" code:

// This is in the main thread
using (StreamReader sr = process.StandardOutput) {
    while (!process.HasExited) {
        processOutput(sr.ReadLine());
    }
}

// Finally, commands are sent in a separate thread.

Now for the problem I am having: When the child process is supposed to be exiting, the server stays at sr.ReadLine() and the client stays at Console.ReadLine(). What am I doing wrong?

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半透明的墙 2024-09-21 05:55:52

确保执行 ReadLine() 的客户端线程将 IsBackground 设置为 true。不要在此线程上执行 Abort() / Join()。只需关闭所有非后台线程即可。我发现即使 IsBackground 设置为 true，在后台线程上执行 Abort() / Join() 也会导致我的测试应用程序等待输入，但是，删除 Abort() / Join() 并定期退出效果很好。

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