ExtendedExecutionSession is not working and uwp app is getting suspended.

Alumni Comp 16 LAXMI SWAMI 46 Reputation points
2021-08-04T09:47:03.547+00:00

I am using BeginExtendedExecution to avoid app suspension but it is getting revoked due to system policy.

Here is my code

 private async void BeginExtendedExecution()
        {         
                ClearExtendedExecution();

                var newSession = new ExtendedExecutionSession();
                newSession.Reason = ExtendedExecutionReason.Unspecified;
                newSession.Description = "Raising periodic toasts";
                newSession.Revoked += SessionRevoked;
                ExtendedExecutionResult result = await newSession.RequestExtensionAsync();

                switch (result)
                {
                    case ExtendedExecutionResult.Allowed:                            
                        session = newSession;
                        break;

                    default:
                    case ExtendedExecutionResult.Denied:
                            newSession.Dispose();
                        break;
                }
        }


 private async void SessionRevoked(object sender, ExtendedExecutionRevokedEventArgs args)
        {
                 await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
                {
                    switch (args.Reason)
                    {
                        case ExtendedExecutionRevokedReason.Resumed:                       
                            break;

                        case ExtendedExecutionRevokedReason.SystemPolicy:
                            break;
                    }

                    EndExtendedExecution();
                });
        }

        private void ClearExtendedExecution()
        {
            if (session != null)
            {
                session.Revoked -= SessionRevoked;
                session.Dispose();
                session = null;
            }

            if (periodicTimer != null)
            {
                periodicTimer.Dispose();
                periodicTimer = null;
            }
        }

        private void EndExtendedExecution()
        {
            ClearExtendedExecution();
        }

Onsuspending method is getting called after few mins of app getting into background

 private void OnSuspending(object sender, SuspendingEventArgs e)
 {
             var deferral = e.SuspendingOperation.GetDeferral();
                deferral.Complete();
  }
Universal Windows Platform (UWP)
{count} votes

1 answer

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  1. Roy Li - MSFT 32,486 Reputation points Microsoft Vendor
    2021-08-05T07:22:31.253+00:00

    Hello,

    Welcome to Microsoft Q&A!

    Yes, the limitation on the laptop is the reason why you get such behavior.

    So is there anything we can do to avoid this?

    Based on the document: Postpone app suspension with extended execution, it mentions that tablets and laptops could get some long-running behavior. A tablet or laptop user can get the same long running behavior--at the expense of battery life--when the Allow the app to run background tasks option is selected in Battery usage by app settings. (To find this option on a laptop, go to Settings > System > Battery > Battery usage by App (the link under the percent of battery power remaining) > select an app > turn off Managed By Windows > select Allow app to run background tasks.

    You could try the way that the document mentions. If you still have questions, please feel free to contact us.

    Thank you.


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