C # The Win32 console application ignores Ctrl + C and stops the program from exiting,

C # The Win32 console application ignores Ctrl + C and stops the program from exiting,

C # In the Win32 console, the application ignores Ctrl + C and stops the program from exiting. The Windows API SetConsoleCtrlHandler function is used here.

Note: When debugging and executing in VS, set a breakpoint in the processing program routine without interruption. A prompt is displayed, such:

Complete sample code:

 

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using System;using System.Collections.Generic;using System.Text;using System.Diagnostics;using System.Runtime.InteropServices;using System.Threading; /************************************************************************//* The CSharp_Win32 console application ignores Ctrl + C * Powered by:testcs_dn * Blog:http://blog.csdn.net/testcs_dn *//************************************************************************/The namespace CSharp_Win32 console application ignores CtrlC{    // Define the handler delegate    public delegate bool ConsoleCtrlDelegate(int ctrlType);     class Program    {        // Import SetCtrlHandlerHandler API        [DllImport("kernel32.dll")]        private static extern bool SetConsoleCtrlHandler(ConsoleCtrlDelegate HandlerRoutine, bool Add);        // When the user closes the Console, the system sends a message.        private const int CTRL_CLOSE_EVENT = 2;        // Ctrl + C, the system will send the message        private const int CTRL_C_EVENT = 0;        // Ctrl + break, the system will send the message        private const int CTRL_BREAK_EVENT = 1;        // Log out (logout) and the system sends the message        private const int CTRL_LOGOFF_EVENT = 5;        // When the system is disabled, the system sends a message.        private const int CTRL_SHUTDOWN_EVENT = 6;         static void Main(string[] args)        {            Program cls = new Program();            //Console.ReadKey();        }        public Program()        {            ConsoleCtrlDelegate consoleDelegete = new ConsoleCtrlDelegate(HandlerRoutine);             bool bRet = SetConsoleCtrlHandler(consoleDelegete, true);            if (bRet == false) // An error occurred while handling the installation event.            {                Console.WriteLine("error");                while (true)                {                    Console.WriteLine("...");                    Thread.Sleep(1000);                }            }            else            {                Console.WriteLine("ok");                while (true)                {                    Console.WriteLine("...");                    Thread.Sleep(1000);                }            }         }         /// <summary>        /// Processing program routine, where you can compile the processing program code for the specified event        /// Note: When debugging and executing in VS, set a breakpoint here, but it will not be interrupted; a prompt will be displayed: no available source;        /// </summary>        ///<param name="CtrlType">        /// <returns></returns>        private static bool HandlerRoutine(int ctrlType)        {            switch(ctrlType)            {                case CTRL_C_EVENT:                    Console.WriteLine("C");                    return true; // Returns true, which indicates that the system is blocked from performing operations on the program.                    //break;                case CTRL_BREAK_EVENT:                    Console.WriteLine("BREAK");                    break;                case CTRL_CLOSE_EVENT:                    Console.WriteLine("CLOSE");                    break;                case CTRL_LOGOFF_EVENT:                    Console.WriteLine("LOGOFF");                    break;                case CTRL_SHUTDOWN_EVENT:                    Console.WriteLine("SHUTDOWN");                    break;            }            // Return true; // indicates that the system is blocked from performing operations on the program.            return false;// Ignore and allow the system to perform default operations        }    }}