c# - Windows 商店应用程序中的 LastInputInfo()

Question

我一直在尝试使用 GetLastInputInfo() 监控活动。我正在使用 Windows 商店应用程序，我在 XamlTypeInfo.g.cs 中收到许多错误，说 LastInputInfo 在当前上下文中不存在，并且 MainPage 的类型在给定上下文中无效。

我是 Windows 商店应用程序的新手，我在 wpf 中对此没有任何问题。请你帮助我好吗？

这就是我使用#region LastInput int totaltime = 0;

    // Declare a new instance of the structure LASTINPUTINFO contained in GetLastInputInfo 
    LASTINPUTINFO lastInputInf = new LASTINPUTINFO();

    // The following code calls the library user32.dll GetLastInputInfo and function. 
    [DllImport("user32.dll")]
    public static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);

    // The DllImport attribute is very useful when reusing existing unmanaged code in a managed application. 
    // How can we find out within the term structure LASTINPUTINFO MarshalAs. 
    // Marshal is responsible to marshal data between managed and unmanaged code. 
    [StructLayout(LayoutKind.Sequential)]
    public struct LASTINPUTINFO
    {
        [MarshalAs(UnmanagedType.U4)]
        public int cbSize;
        [MarshalAs(UnmanagedType.U4)]
        public int dwTime;
    }

    public int GetLastInputTime()
    {
        int idletime = 0;

        lastInputInf.cbSize = Marshal.SizeOf(lastInputInf);
        lastInputInf.dwTime = 0;

        if (GetLastInputInfo(ref lastInputInf))
        {
            idletime = Environment.TickCount - lastInputInf.dwTime;
        }

        if (idletime != 0)
        {
            return idletime / 1000;
        }
        else
        {
            return 0;
        }
    }

    public void dispatcherTimer_Tick(object sender, object e)
    {
        totaltime = GetLastInputTime();
        if (totaltime > 10)
        {
            dt.Stop();
            TransitionScreenSaver();

        }

    }