C# Win32控制台应用程序忽略 Ctrl + C,阻止程序…

2018-06-18 04:57:58来源:未知 阅读 ()

新老客户大回馈,云服务器低至5折

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:

 

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
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
        }
    }
}

标签:

版权申明:本站文章部分自网络,如有侵权,请联系:west999com@outlook.com
特别注意:本站所有转载文章言论不代表本站观点,本站所提供的摄影照片,插画,设计作品,如需使用,请与原作者联系,版权归原作者所有

上一篇:关于EventHandler的使用

下一篇:HTTP 错误 403.14 - Forbidden Web 服务器被配置为不列出此目录