Background Task In Windows Universal Apps

Here I'm sharing some notes on the Background task.

• Background task allows us to run our code, when our app is not in the foreground.
  
  
  
  
• Starting with Windows 10, you no longer need to place an app on the lock screen in order to register the background tasks.
  
  
• Background tasks are limited to 30 seconds of wall-clock usage.
  
  
• Respect Cost: Add BackgroundWorkCostValue in run() to get an access on priority from the system.
  
  
  
  
• Querying cost can prevent the cancellations and incomplete operations.
  
• Handle System Cancellations:
  
  
  
  
• Use deferral for any Asynchronous operations.
  
  
• App can have more than one background task.
  
  
• If it gets the permission, build and register task (add triggers, add system conditions, task.register()).
  
  
  
  
• Some of the Triggers : DeviceWatcherTrigger , ActivitySensorTrigger , SensorDataThresholdTrigger , ToastNotificationHistoryChangedTrigger , ToastNotificationActionTrigger ,AppointmentStoreNotificationTrigger , ContactStoreNotificationTrigger , EmailStoreNotificationTrigger , BluetoothLEAdvertisementWatcherTrigger , BluetoothLEAdvertisementPublisherTrigger , MediaProcessingTrigger ,SocketActivityTrigger
  
  
• User Invoked Constraints: Quite Hours(No toast, No Background task,Active task are cancelled). Still allowed are VOIP toast and Alarm toast.
  
  
• Debugging : Visual Studio can trigger. Application logs = Appication & Services Logs ->Microsoft -> BackgroundTaskInfrastructure.