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 0;
}
else
{
var count = Environment.TickCount - (long)vLastInputInfo.dwTime;
var icount = count / 1000;
return icount;
}
}

}

static void Main(string[] args)
{
Timer t = null;
t = new Timer((o) =>
{
var result = GetLastInputTime();
Console.WriteLine(result);
if (result < 1*60) return;
if (t == null) return;
t.Dispose();
Console.WriteLine("电脑1分钟未操作！");
}, null, 1000, 1000);

Console.ReadLine();
}