C# Win32控制台應用程序忽略 Ctrl + C,阻止程序退出


C# Win32控制台應用程序忽略 Ctrl + C,阻止程序退出,這里使用到了Windows API SetConsoleCtrlHandler函數

注意:在VS中調試執行時,在處理程序例程中設置斷點,不會中斷;會提示:無可用源,如下圖:

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完整示例代碼:

 

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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控制台應用程序忽略 Ctrl + C
  * Powered by:testcs_dn
  */
/************************************************************************/
namespace CSharp_Win32控制台應用程序忽略CtrlC
{
     //定義處理程序委托
     public delegate bool ConsoleCtrlDelegate( int ctrlType);
 
     class Program
     {
         //導入SetCtrlHandlerHandler API
         [DllImport( "kernel32.dll" )]
         private static extern bool SetConsoleCtrlHandler(ConsoleCtrlDelegate HandlerRoutine, bool Add);
         //當用戶關閉Console時,系統會發送次消息
         private const int CTRL_CLOSE_EVENT = 2 ;
         //Ctrl+C,系統會發送次消息
         private const int CTRL_C_EVENT = 0 ;
         //Ctrl+break,系統會發送次消息
         private const int CTRL_BREAK_EVENT = 1 ;
         //用戶退出(注銷),系統會發送次消息
         private const int CTRL_LOGOFF_EVENT = 5 ;
         //系統關閉,系統會發送次消息
         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 ) //安裝事件處理失敗
             {
                 Console.WriteLine( "error" );
                 while ( true )
                 {
                     Console.WriteLine( "..." );
                     Thread.Sleep( 1000 );
                 }
             }
             else
             {
                 Console.WriteLine( "ok" );
                 while ( true )
                 {
                     Console.WriteLine( "..." );
                     Thread.Sleep( 1000 );
                 }
             }
 
         }
 
         /// <summary>
         /// 處理程序例程,在這里編寫對指定事件的處理程序代碼
         /// 注意:在VS中調試執行時,在這里設置斷點,但不會中斷;會提示:無可用源;
         /// </summary>
         ///<param name="CtrlType">
         /// <returns></returns>
         private static bool HandlerRoutine( int ctrlType)
         {
             switch (ctrlType)
             {
                 case CTRL_C_EVENT:
                     Console.WriteLine( "C" );
                     return true ; //這里返回true,表示阻止響應系統對該程序的操作
                     //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;//表示阻止響應系統對該程序的操作
             return false ; //忽略處理,讓系統進行默認操作
         }
     }
}


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