Timer in UWP App which isn't linked to the UI

Question

I\'m working on an UWP MVVM project and would like to implement an automatic logout system if the user interaction stops for a specific time.
Until now I\'m using a

Answer 1

You may be right at your code but I have used threadpool timer instead of dispacher timer, after referring above blog.

If I talk about initial level I was using dispatcher timer for my app, what happens actually, it goes hang after every 2days of continuous standby. So I thought of threadpool timer as you are referring in this blog, but in threadpool it went hung in just 5-6 hours.

So as per my experience I think dispatcher timer is more preferable than threadpool timer.

It's just my experience of using it.

Answer 2

I resolved this issue recently using a ThreadPoolTimer class.

ThreadPoolTimer timer = ThreadPoolTimer.CreatePeriodicTimer((t) =>
        {
            //do some work \ dispatch to UI thread as needed
        }, TimeSpan.FromMinutes(1));

At present I am not aware of any advantage of this over the Timer solution already posted, but it has functioned well.

Answer 3

Yes - you can for example use Timer class - though you must remember that it run on separate thread. Example:

private Timer timer;
public MainPage()
{        
    this.InitializeComponent();
    timer = new Timer(timerCallback, null, (int)TimeSpan.FromMinutes(1).TotalMilliseconds, Timeout.Infinite);
}

private async void timerCallback(object state)
{
    // do some work not connected with UI

    await Window.Current.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
        () => {
            // do some work on UI here;
        });
}

Note that the work dispatched on UI dispatcher may not be processed right away - it depend on dispatcher's workload.

Also remember that this timer runs along with your app and won't work when app is suspended.