.net - 阻止 .net 控制台应用程序被关闭

Question

有没有办法阻止 .NET 控制台应用程序被关闭？我有一个遵循这种模式的应用程序:

while (true)
{
    string x = Console.ReadLine();
    StartLongRunningTaskOnSeparateThread(x);
}

问题是可以关闭控制台窗口(从而切断长时间运行的任务)。控制台应用程序是否有等效的 Forms.OnClosing 事件？

编辑 - 我不是想创造一些不可能杀死的东西，只是可能给出一个警告信息，例如“嘿，我还没有完成。你确定要关闭我吗？”

EDIT2 - 防止通过“x”按钮过早退出比阻止 Ctrl-C 更重要(我使用了 Console.TreatControlCAsInput = true; )。为此，假设任何启动任务管理器的人都想杀死该程序，以至于他们理应如此。并且最终用户宁愿看到警告也不愿意外取消他们长时间运行的任务。

Answer 1

这是我解决这个问题的尝试。任务管理器仍然可以关闭应用程序。但是，我的想法是尝试检测它何时关闭，然后重新启动它。但是，我没有实现那部分。

以下程序将检测 CTRL-C && CTRL-BREAK 并继续运行。

编辑:删除了“X”按钮

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Diagnostics;

namespace DoNotCloseMe
{
    class Program
    {

        const string _title = "DO NOT CLOSE - Important Program";

        static void Main(string[] args)
        {

            Console.Title = _title;

            IntPtr hMenu = Process.GetCurrentProcess().MainWindowHandle;
            IntPtr hSystemMenu = GetSystemMenu(hMenu, false);

            EnableMenuItem(hSystemMenu, SC_CLOSE, MF_GRAYED);
            RemoveMenu(hSystemMenu, SC_CLOSE, MF_BYCOMMAND);

            WriteConsoleHeader();

            //This function only seems to be called once.
            //After calling MainLoop() below, CTRL-C && CTRL-BREAK cause Console.ReadLine() to return NULL 
            Console.CancelKeyPress += (sender, e) =>
            {
                Console.WriteLine("Clean-up code invoked in CancelKeyPress handler.");
                Console.WriteLine("Key Pressed: {0}", e.SpecialKey.ToString());
                System.Threading.Thread.Sleep(1000);
                MainLoop();
                // The application terminates directly after executing this delegate.
            };

            MainLoop();

        }

        private static void MainLoop()
        {
            while (true)
            {
                WriteConsoleHeader();
                string x = Console.ReadLine();
                if (!String.IsNullOrEmpty(x))
                {
                    switch (x.ToUpperInvariant())
                    {
                        case "EXIT":
                        case "QUIT":
                            System.Environment.Exit(0);
                            break;
                        default:
                            StartLongRunningTaskOnSeparateThread(x);
                            break;
                    }

                }
            }
        }

        private static void StartLongRunningTaskOnSeparateThread(string command)
        {
            var bg = new System.ComponentModel.BackgroundWorker();
            bg.WorkerReportsProgress = false;
            bg.WorkerSupportsCancellation = false;

            bg.DoWork += (sender, args) =>
            {
                var sleepTime = (new Random()).Next(5000);
                System.Threading.Thread.Sleep(sleepTime);
            };


            bg.RunWorkerCompleted += (sender, args) =>
            {
                Console.WriteLine("Commmand Complete: {0}", command);
            };

            bg.RunWorkerAsync();

        }

        private static void WriteConsoleHeader()
        {
            Console.Clear();
            Console.WriteLine(new string('*', Console.WindowWidth - 1));
            Console.WriteLine(_title);
            Console.WriteLine(new string('*', Console.WindowWidth - 1));
            Console.WriteLine("Please do not close this program.");
            Console.WriteLine("It is maintaining the space/time continuum.");
            Console.WriteLine("If you close it, Q will not be happy and you will be assimilated.");
            Console.WriteLine(new string('*', Console.WindowWidth - 1));
            Console.WriteLine("Development Mode: Use \"EXIT\" or \"QUIT\" to exit application.");
            Console.WriteLine(new string('*', Console.WindowWidth - 1));
        }

        #region "Unmanaged"

        [DllImport("user32.dll")]
        static extern bool EnableMenuItem(IntPtr hMenu, uint uIDEnableItem, uint uEnable);

        [DllImport("user32.dll")]
        static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);

        [DllImport("user32.dll")]
        static extern IntPtr RemoveMenu(IntPtr hMenu, uint nPosition, uint wFlags);

        internal const uint SC_CLOSE = 0xF060;
        internal const uint MF_GRAYED = 0x00000001;
        internal const uint MF_BYCOMMAND = 0x00000000;

        #endregion
    }
}