学了三个月C#,这是我第一个真正动过脑子的程序。目的是设置只允许儿子在星期六或星期天的下午用电脑2小时，而且每小时之间还要休息一段时间。我使用了Win7设置一个普通权限的用户名给儿子。并兴冲冲的设计了一个控制台程序，本以为一个EXE文件可以很绿色很环保，可是问题来了，不管怎么搞，程序都是执行后即退出DOS窗口，Timer也就不会继续计时，那怕1000毫秒都不计。以下为程序：

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Timers;
using System.Runtime.InteropServices;
using System.Threading;



namespace ShutDownComputer
{
    class Program
    {
 
        static void Main(string[] args)
        {
            string userName = Environment.UserName;
            //识别用户名，进入星期判断
            if (userName == "binhan")
                Times.ShutdownOfWeek();
            
        }
    }
    class Times
    {
        private static System.Timers.Timer aTimer;
        //Timer事件
        private static void OnTimedEvent(object source, ElapsedEventArgs e)  
        {
            //一小时一到，即运行注销
            Shutdown.DoExitWin(Shutdown.EWX_FORCE | Shutdown.EWX_LOGOFF);
        }
        //判断是否星期六、星期日，若是即进入时间区间判断
        public static void ShutdownOfWeek()
        {

            int dayOfWeek = (int)DateTime.Now.DayOfWeek;
            if (dayOfWeek == 6 || dayOfWeek == 0)

                ShutdownOfTime();

            else

                Shutdown.DoExitWin(Shutdown.EWX_FORCE | Shutdown.EWX_LOGOFF);
        }
        //时间区间判断
        public  static void ShutdownOfTime()
        {
            //读取系统当前时间
            DateTime NowTime = new DateTime();
            NowTime = DateTime.Now;
            //设置允许使用的时间区间
            DateTime EachTime1 = new DateTime(NowTime.Year, NowTime.Month, NowTime.Day, 12, 30, 00);
            DateTime EachTime2 = new DateTime(NowTime.Year, NowTime.Month, NowTime.Day, 13, 30, 00);
            DateTime EachTime3 = new DateTime(NowTime.Year, NowTime.Month, NowTime.Day, 15, 30, 00);
            DateTime EachTime4 = new DateTime(NowTime.Year, NowTime.Month, NowTime.Day, 16, 30, 00);

            aTimer = new System.Timers.Timer();
            aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
            aTimer.AutoReset = false;
            aTimer.Interval = 3600000;
            
            if (NowTime >= EachTime1 && NowTime <= EachTime2)
            {
                  aTimer.Enabled = true;
                 
            }
            else
            {
                if (NowTime >= EachTime3 && NowTime <= EachTime4)
                {
                    aTimer.Enabled = true;  
                 
                }   
                
                else
                    Shutdown.DoExitWin(Shutdown.EWX_FORCE | Shutdown.EWX_LOGOFF);
            }

        }
    }
        
    //这是网上搜来的利用P/Invoke 调用窗口API的关机、重启、注销程序
    class Shutdown
    {
        [StructLayout(LayoutKind.Sequential, Pack = 1)]
        internal struct TokPriv1Luid
        {
            public int Count;
            public long Luid;
            public int Attr;
        }

        [DllImport("kernel32.dll", ExactSpelling = true)]
        internal static extern IntPtr GetCurrentProcess();

        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
        internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);

        [DllImport("advapi32.dll", SetLastError = true)]
        internal static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);

        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
        internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall,
        ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);

        [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
        internal static extern bool ExitWindowsEx(int flg, int rea);

        internal const int SE_PRIVILEGE_ENABLED = 0x00000002;
        internal const int TOKEN_QUERY = 0x00000008;
        internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
        internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";
        internal const int EWX_LOGOFF = 0x00000000;
        internal const int EWX_SHUTDOWN = 0x00000001;
        internal const int EWX_REBOOT = 0x00000002;
        internal const int EWX_FORCE = 0x00000004;
        internal const int EWX_POWEROFF = 0x00000008;
        internal const int EWX_FORCEIFHUNG = 0x00000010;

        public static void DoExitWin(int flg)
        {
            bool ok;
            TokPriv1Luid tp;
            IntPtr hproc = GetCurrentProcess();
            IntPtr htok = IntPtr.Zero;
            ok = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);
            tp.Count = 1;
            tp.Luid = 0;
            tp.Attr = SE_PRIVILEGE_ENABLED;
            ok = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);
            ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);
            ok = ExitWindowsEx(flg, 0);
        } 
    }
}