C# Win32控制台应用程序忽略 Ctrl + C，阻止程序退出

C# Win32控制台应用程序忽略 Ctrl + C，阻止程序退出，这里使用到了Windows API SetConsoleCtrlHandler函数

注意：在VS中调试执行时，在处理程序例程中设置断点，不会中断；会提示：无可用源，如下图：

完整示例代码：

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using System; using System.Collections.Generic; using System.Text; using System.Diagnostics; using System.Runtime.InteropServices; using System.Threading;   /************************************************************************/ /* CSharp_Win32控制台应用程序忽略 Ctrl + C  * Powered by:testcs_dn  * Blog:http://blog.csdn.net/testcs_dn  */ /************************************************************************/ namespace CSharp_Win32控制台应用程序忽略CtrlC {     //定义处理程序委托     public delegate bool ConsoleCtrlDelegate(int ctrlType);       class Program     {         //导入SetCtrlHandlerHandler API         [DllImport("kernel32.dll")]         private static extern bool SetConsoleCtrlHandler(ConsoleCtrlDelegate HandlerRoutine, bool Add);         //当用户关闭Console时，系统会发送次消息         private const int CTRL_CLOSE_EVENT = 2;         //Ctrl+C，系统会发送次消息         private const int CTRL_C_EVENT = 0;         //Ctrl+break，系统会发送次消息         private const int CTRL_BREAK_EVENT = 1;         //用户退出（注销），系统会发送次消息         private const int CTRL_LOGOFF_EVENT = 5;         //系统关闭，系统会发送次消息         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) //安装事件处理失败             {                 Console.WriteLine("error");                 while (true)                 {                     Console.WriteLine("...");                     Thread.Sleep(1000);                 }             }             else             {                 Console.WriteLine("ok");                 while (true)                 {                     Console.WriteLine("...");                     Thread.Sleep(1000);                 }             }           }           /// <summary>         /// 处理程序例程，在这里编写对指定事件的处理程序代码         /// 注意：在VS中调试执行时，在这里设置断点，但不会中断；会提示：无可用源；         /// </summary>         ///<param name="CtrlType">         /// <returns></returns>         private static bool HandlerRoutine(int ctrlType)         {             switch(ctrlType)             {                 case CTRL_C_EVENT:                     Console.WriteLine("C");                     return true; //这里返回true，表示阻止响应系统对该程序的操作                     //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;//表示阻止响应系统对该程序的操作             return false;//忽略处理，让系统进行默认操作         }     } }