系統空閒時間 - Windows服務

Question

我正在使用Windows服務，需要知道本地計算機閒置了多長時間。我已經嘗試了標準的Qt方法，但由於該服務是以LocalSystem身份運行的，因此它不會註冊本地用戶活動。

有關如何在應用程序以LocalSystem身份運行時獲取機器空閒狀態的任何想法？

Answer 1

不知道這是否有幫助。從文章：here

由於我們使用的非託管庫，首先出現的額外using語句：？獲取用戶的空閒時間在C＃]的

using System.Runtime.InteropServices; 

// Unmanaged function from user32.dll  
[DllImport("user32.dll")]  
static extern bool GetLastInputInfo(ref LASTINPUTINFO plii); 
// Struct we'll need to pass to the function  
internal struct LASTINPUTINFO  
{  
    public uint cbSize;  
    public uint dwTime;  
} 

private void tmrIdle_Tick(object sender, EventArgs e)  
{  
    // Get the system uptime  
    int systemUptime = Environment.TickCount;  
    // The tick at which the last input was recorded  
    int LastInputTicks = 0;  
    // The number of ticks that passed since last input  
    int IdleTicks = 0;    
    // Set the struct  
    LASTINPUTINFO LastInputInfo = new LASTINPUTINFO();  
    LastInputInfo.cbSize = (uint)Marshal.SizeOf(LastInputInfo);  
    LastInputInfo.dwTime = 0;  

    // If we have a value from the function  
    if (GetLastInputInfo(ref LastInputInfo))  
    {  
     // Get the number of ticks at the point when the last activity was seen  
     LastInputTicks = (int)LastInputInfo.dwTime;  
     // Number of idle ticks = system uptime ticks - number of ticks at last input  
     IdleTicks = systemUptime - LastInputTicks;  
    }   

    // Set the labels; divide by 1000 to transform the milliseconds to seconds  
    lblSystemUptime.Text = Convert.ToString(systemUptime/1000) + " seconds";  
    lblIdleTime.Text = Convert.ToString(IdleTicks/1000) + " seconds";  
    lblLastInput.Text = "At second " + Convert.ToString(LastInputTicks/1000);  
}