Code instance that handles 2 shutdown events in a C # console program

Application Scenarios

We develop a console application that is likely to be terminated by the user Ctrl + C at run time or closed directly by the user. If we do not want users to terminate our program via CTRL + C, we need to handle CTRL + C or shutdown events.

Processing methods

There is a cancelkeypress event in the console class under the. NET platform that handles CTRL + C, but there is nothing to do with directly shutting down the console application.

However, there is a SetConsoleCtrlHandler function in the Windows API that can handle both of these shutdown events.

C # handles the code as follows:

The code is as follows:

Static Class Program

{

Public delegate bool Controlctrldelegate (int ctrltype);

[DllImport ("kernel32.dll")]

private static extern bool SetConsoleCtrlHandler (controlctrldelegate handlerroutine, bool Add);

private static Controlctrldelegate Cancelhandler = new Controlctrldelegate (handlerroutine);

public static bool Handlerroutine (int ctrltype)

{

Switch (ctrltype)

{

Case 0:

Console.WriteLine ("0 tool is forced to close"); CTRL + C Close

Break

Case 2:

Console.WriteLine ("2 tool is forced to close");//Press the console Close button to close

Break

}

Console.ReadLine ();

return false;

}

<summary>

The main entry point for the application.

</summary>

[STAThread]

static void Main (string[] args)

{

SetConsoleCtrlHandler (Cancelhandler, true);

Console.ReadLine ();

}

}

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Code instance that handles 2 shutdown events in a C # console program

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Code instance that handles 2 shutdown events in a C # console program