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 */ /************************************************************************/ 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 } } } |