WPF 秒表 计时器 定时关机 到计时关机
  public const uint WM_SYSCOMMAND = 0x0112;
        public const uint SC_MONITORPOWER = 0xF170;
        [DllImport("user32")]
        public static extern IntPtr SendMessage(IntPtr hWnd, uint wMsg, uint wParam, int lParam);
        /// 
        /// 关闭显示器 
        /// 
        public void CloseScreen()
        {
            
            IntPtr windowHandle =  Process.GetCurrentProcess().MainWindowHandle;
            SendMessage(windowHandle, WM_SYSCOMMAND, SC_MONITORPOWER, 2);    // 2 为关闭显示器, -1则打开显示器 
        }
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;
using IniFiles;
namespace StopWatch
{
    /// 
    /// shutdonwCtrl.xaml 的交互逻辑
    /// 
    public partial class shutdonwCtrl : UserControl
    {
        DispatcherTimer timer1;
        DispatcherTimer timer2;
        public shutdonwCtrl()
        {
            InitializeComponent();
            timer1 = new DispatcherTimer();
            timer1.Tick += new EventHandler(OnTimer1);
            timer1.Interval = new TimeSpan(0, 0, 1);
            timer2 = new DispatcherTimer();
            timer2.Tick += new EventHandler(OnTimer2);
            timer2.Interval = new TimeSpan(0, 0, 1);
            btn_cancel.IsEnabled = false;
            cancel1.IsEnabled = false;
        }
        IniFile INI = new IniFile(IniFile.AppIniName);
        public void LoadIni()
        {
            cbo_hour.Text = INI.ReadString("定时关机", "时", "0");
            cbo_Minute.Text = INI.ReadString("定时关机", "分", "0");
            cbo_Second.Text = INI.ReadString("定时关机", "秒", "0");
            cbo1.Text = INI.ReadString("到计时关机", "分", "0");
                                    
                                    
                                        
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