54 lines
1.6 KiB
C#
54 lines
1.6 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace DM_Weight.util
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{
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public class CheckComputerFreeState
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{
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/// <summary>
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/// 创建结构体用于返回捕获时间
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/// </summary>
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[StructLayout(LayoutKind.Sequential)]
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struct LASTINPUTINFO
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{
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/// <summary>
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/// 设置结构体块容量
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/// </summary>
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[MarshalAs(UnmanagedType.U4)]
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public int cbSize;
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/// <summary>
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/// 抓获的时间
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/// </summary>
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[MarshalAs(UnmanagedType.U4)]
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public uint dwTime;
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}
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[DllImport("user32.dll")]
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private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
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/// <summary>
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/// 获取键盘和鼠标没有操作的时间
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/// </summary>
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/// <returns>用户上次使用系统到现在的时间间隔，单位为秒</returns>
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public static long GetLastInputTime()
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{
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LASTINPUTINFO vLastInputInfo = new LASTINPUTINFO();
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vLastInputInfo.cbSize = Marshal.SizeOf(vLastInputInfo);
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if (!GetLastInputInfo(ref vLastInputInfo))
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{
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return 0;
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}
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else
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{
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var count = (Environment.TickCount & Int32.MaxValue) - (long)vLastInputInfo.dwTime;
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var icount = count / 1000;
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return icount;
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}
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}
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}
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}
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