如何使用SetConsoleHandler（）来阻止退出调用 [英] How to use SetConsoleHandler() to block exit calls

问题描述

我知道如果我想要管理控制台关闭事件，我必须使用 setconsolehandler（）。

I know that I have to use setconsolehandler() if I want to manage console closing events.

我不知道如何阻止 CTRL_CLOSE_EVENT 。我尝试返回false / true，如果它捕获该事件，但没有成功

I do not know how to block the CTRL_CLOSE_EVENT. I've tried returning false/true if it catches that event, but no success

这是我到目前为止（谢谢Anton Gogolev！）

Here is what I have so far (thank you Anton Gogolev!)

[DllImport("Kernel32")]
public static extern bool SetConsoleCtrlHandler(HandlerRoutine Handler, bool Add);

public delegate bool HandlerRoutine(CtrlTypes CtrlType);

public enum CtrlTypes{
    CTRL_C_EVENT = 0,
    CTRL_BREAK_EVENT,
    CTRL_CLOSE_EVENT,
    CTRL_LOGOFF_EVENT = 5,
    CTRL_SHUTDOWN_EVENT
}

private static bool ConsoleCtrlCheck(CtrlTypes ctrlType)
{ 
    if(ctrlType == CtrlTypes.CTRL_CLOSE_EVENT)
        return false;// I have tried true and false and viceversa with the return   
                     // true/false but I cant seem to get it right.
    return true;
}


//and then I use this to call it
SetConsoleCtrlHandler(new HandlerRoutine(ConsoleCtrlCheck), true);

也可以运行一个新的线程来监视，如果控制台关闭并阻止关闭if主线程正在做某事？

Also is it possible to run a new thread to monitor if the console is closing and block that close if the main thread is in the middle of doing something?

推荐答案

SetConsoleCtrlHandler（） 说：

当用户关闭控制台，注销或关闭系统时，系统会生成CTRL_CLOSE_EVENT，CTRL_LOGOFF_EVENT和CTRL_SHUTDOWN_EVENT信号，

The system generates CTRL_CLOSE_EVENT, CTRL_LOGOFF_EVENT, and CTRL_SHUTDOWN_EVENT signals when the user closes the console, logs off, or shuts down the system so that the process has an opportunity to clean up before termination.

这意味着与处理CTRL + C或CTRL + BREAK事件不同，您的进程不会有机会取消关闭，注销或关闭。

This implies that unlike when handling CTRL+C or CTRL+BREAK events, your process does not get the opportunity to cancel the close, logoff, or shutdown.

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