Shutdown WPF application after n seconds of inactivity

Question

How do I shutdown a WPF application after 'n' seconds of inactivity?

Answer 1

You'll need to define "activity", but basically you want to start a timer. Then every time there is some "activity" (whether it's mouse clicks or mouse moves etc.) the timer is reset.

Then in the timer when it reaches your limit just post an event to call the application close method.

Answer 2

Hi!

There was a discussion in msdn social about this matter. Check it and please post what did work for you....

I paste you the code from the discussion (the one I think it will do what you need):

public partial class Window1 : Window
{
    private EventHandler handler;
    public Window1()
    {
        InitializeComponent();

        handler = delegate
        {
            DispatcherTimer timer = new DispatcherTimer();
            timer.Interval = TimeSpan.FromSeconds(4);
            timer.Tick += delegate
            {
                if (timer != null)
                {
                    timer.Stop();
                    timer = null;
                    System.Windows.Interop.ComponentDispatcher.ThreadIdle -= handler;
                    MessageBox.Show("You get caught!");
                    System.Windows.Interop.ComponentDispatcher.ThreadIdle += handler;
                }

            };

            timer.Start();

            //System.Windows.Interop.ComponentDispatcher.ThreadIdle -= handler;
            Dispatcher.CurrentDispatcher.Hooks.OperationPosted += delegate
            {
                if (timer != null)
                {
                    timer.Stop();
                    timer = null;
                }
            };
        };

        ComponentDispatcher.ThreadIdle += handler;
    }
}

Answer 3

A bit late, but I came up with this code, it restarts a timer on any input event:

  public partial class Window1 : Window {
    DispatcherTimer mIdle;
    private const long cIdleSeconds = 3;
    public Window1() {
      InitializeComponent();
      InputManager.Current.PreProcessInput += Idle_PreProcessInput;
      mIdle = new DispatcherTimer();
      mIdle.Interval = new TimeSpan(cIdleSeconds * 1000 * 10000);
      mIdle.IsEnabled = true;
      mIdle.Tick += Idle_Tick;
    }

    void Idle_Tick(object sender, EventArgs e) {
      this.Close();
    }

    void Idle_PreProcessInput(object sender, PreProcessInputEventArgs e) {
      mIdle.IsEnabled = false;
      mIdle.IsEnabled = true;
    }
  }