WPF 窗体中获取键盘和鼠标无操作时的超时提示

原文:WPF 窗体中获取键盘和鼠标无操作时的超时提示

通过调用Windows API中的GetLastInputInfo来获取最后一次输入的时间

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.Shapes;using System.Runtime.InteropServices;namespace WpfApplication1{    /// <summary>    /// Window1.xaml 的交互逻辑    /// </summary>    public partial class Window1 : Window    {        System.Windows.Threading.DispatcherTimer timer;        public Window1()        {            InitializeComponent();            timer = new System.Windows.Threading.DispatcherTimer();            timer.Interval = new TimeSpan(0, 0, 1);            timer.Tick += new EventHandler(timer_Tick);            timer.Start();        }        void timer_Tick(object sender, EventArgs e)        {            if (GetIdleTick() / 1000 > 10)               {                MessageBox.Show("键盘或鼠标没有操作超过10秒");            }        }        [DllImport("user32.dll")]        static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);        public static long GetIdleTick()        {            LASTINPUTINFO lastInputInfo = new LASTINPUTINFO();            lastInputInfo.cbSize = Marshal.SizeOf(lastInputInfo);            if (!GetLastInputInfo(ref　lastInputInfo)) return 0;            return Environment.TickCount - (long)lastInputInfo.dwTime;        }        [StructLayout(LayoutKind.Sequential)]        private struct LASTINPUTINFO        {            [MarshalAs(UnmanagedType.U4)]            public int cbSize;            [MarshalAs(UnmanagedType.U4)]            public uint dwTime;        }    }}