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
}
}
} |