C# 检测操作系统是否空闲，实现系统空闲后做一些操作

     public class CheckComputerFreeState
     {

         /// <summary>

         /// 创建结构体用于返回捕获时间

        /// </summary>

         [StructLayout(LayoutKind.Sequential)]

         struct LASTINPUTINFO

         {

             /// <summary>

             /// 设置结构体块容量

            /// </summary>

             [MarshalAs(UnmanagedType.U4)]

             public int cbSize;

            /// <summary>

             /// 抓获的时间

            /// </summary>

             [MarshalAs(UnmanagedType.U4)]

             public uint dwTime;

         }

        [DllImport("user32.dll")]

         private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);

         /// <summary>

         /// 获取键盘和鼠标没有操作的时间

        /// </summary>

         /// <returns>用户上次使用系统到现在的时间间隔，单位为秒</returns>

         public static long GetLastInputTime()

         {

             LASTINPUTINFO vLastInputInfo = new LASTINPUTINFO();

             vLastInputInfo.cbSize = Marshal.SizeOf(vLastInputInfo);

             if (!GetLastInputInfo(ref vLastInputInfo))

             {

                 return ;

             }

             else

             {

                 var count = Environment.TickCount - (long)vLastInputInfo.dwTime;

                 var icount = count / ;

                 return icount;

             }

         }

    }

调用：

       static void Main(string[] args)

        {

            Timer t = null;

            t = new Timer((o) =>

           {

               var result = GetLastInputTime();

               Console.WriteLine(result);

               if (result < *) return;

               if (t == null) return;

               t.Dispose();

               Console.WriteLine("电脑1分钟未操作！");

           }, null, , );

            Console.ReadLine();

        }