An error is returned if any of the registration parameters are invalid. String ^ taskName = "Example hourly background task" īackgroundTaskRegistration ^ task = RegisterBackgroundTask(entryPoint, taskName, hourlyTrigger, userCondition) īackground task registration parameters are validated at the time of registration. String ^ entryPoint = "Tasks.ExampleBackgroundTaskClass" Windows::ApplicationModel::Background::TimeTrigger hourlyTrigger TimeTrigger hourlyTrigger = new TimeTrigger(60, false) If FreshnessTime is set to less than 15 minutes, an exception is thrown when attempting to register the background task.įor example, this trigger will cause a background task to run once an hour. If it is set to n minutes and OneShot is false, the task will be scheduled to run every n minutes starting between n and n + 15 minutes after it is registered. If FreshnessTime is set to 15 minutes and OneShot is false, the task will be scheduled to run every 15 minutes starting between 15 and 30 minutes from the time it is registered. If it is set to 25 minutes and OneShot is true, the task will be scheduled to run once starting between 25 and 40 minutes from the time it is registered. If FreshnessTime is set to 15 minutes and OneShot is true, the task will be scheduled to run once starting between 15 and 30 minutes from the time it is registered. (The timer runs in 15-minute intervals so that the system only needs to wake once every 15 minutes to wake up the apps that have requested TimerTriggers-which saves power.) The built-in timer for Universal Windows Platform (UWP) apps that target the desktop or mobile device family runs background tasks in 15-minute intervals. If OneShot is set to false, FreshnessTime specifies the frequency at which the background task will run. If OneShot is set to true, the first parameter ( FreshnessTime) specifies the number of minutes to wait before scheduling the background task. The second parameter, OneShot, specifies whether the background task will run only once or keep running periodically. Create a time triggerĬreate a new TimeTrigger. Or, follow the steps in Create and register an in-process background task or Create and register an out-of-process background task to create one. If you don't already have a background task, there is a sample background task at BackgroundActivity.cs. This topic assumes that you have a background task that needs to run periodically, or at a specific time.
#MOVIE RUNNING TIME COMMANDO HOW TO#
See Scenario4 in the Background activation sample to see an example of how to implement the time triggered background task described in this topic.
Learn how to use the TimeTrigger to schedule a one-time background task, or run a periodic background task.
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