/// <summary>
/// This is the click handler for the 'Register' button.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
async private void RegisterBackgroundTask(object sender, RoutedEventArgs e)
{
// Get permission for a background task from the user. If the user has already answered once,
// this does nothing and the user must manually update their preference via PC Settings.
BackgroundAccessStatus backgroundAccessStatus = await BackgroundExecutionManager.RequestAccessAsync();
// Regardless of the answer, register the background task. If the user later adds this application
// to the lock screen, the background task will be ready to run.
// Create a new background task builder
BackgroundTaskBuilder visitTaskBuilder = new BackgroundTaskBuilder();
visitTaskBuilder.Name = SampleBackgroundTaskName;
visitTaskBuilder.TaskEntryPoint = SampleBackgroundTaskEntryPoint;
// Create a new visit trigger
var trigger = new GeovisitTrigger();
// Set the desired monitoring scope.
// For higher granularity such as venue/building level changes, choose venue.
// For lower granularity more or less in the range of zipcode level changes, choose city.
// Choosing Venue here as an example.
trigger.MonitoringScope = VisitMonitoringScope.Venue;
// Associate the trigger with the background task builder
visitTaskBuilder.SetTrigger(trigger);
// If it is important that there is user presence and/or
// internet connection when OnCompleted is called
// the following could be called before calling Register()
// SystemCondition condition = new SystemCondition(SystemConditionType.UserPresent | SystemConditionType.InternetAvailable);
// visitTaskBuilder.AddCondition(condition);
// Register the background task
_visitTask = visitTaskBuilder.Register();
// Associate an event handler with the new background task
_visitTask.Completed += OnCompleted;
UpdateButtonStates(registered: true);
switch (backgroundAccessStatus)
{
case BackgroundAccessStatus.AlwaysAllowed:
case BackgroundAccessStatus.AllowedSubjectToSystemPolicy:
// BackgroundTask is allowed
_rootPage.NotifyUser("Geofence background task registered.", NotifyType.StatusMessage);
// Need to request access to location
// This must be done with the background task registeration
// because the background task cannot display UI.
RequestLocationAccess();
break;
default:
_rootPage.NotifyUser("Background tasks may be disabled for this app", NotifyType.ErrorMessage);
break;
}
}
/// <summary>
/// This is the click handler for the 'Register' button.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
async private void RegisterBackgroundTask(object sender, RoutedEventArgs e)
{
// Get permission for a background task from the user. If the user has already answered once,
// this does nothing and the user must manually update their preference via Settings.
BackgroundAccessStatus backgroundAccessStatus = await BackgroundExecutionManager.RequestAccessAsync();
// Regardless of the answer, register the background task. If the user later enables background
// execution, the background task will be ready to run.
// Create a new background task builder
BackgroundTaskBuilder visitTaskBuilder = new BackgroundTaskBuilder();
visitTaskBuilder.Name = BackgroundTaskName;
visitTaskBuilder.TaskEntryPoint = BackgroundTaskEntryPoint;
// Create a new visit trigger
var trigger = new GeovisitTrigger();
// Set the desired monitoring scope.
// For higher granularity such as venue/building level changes, choose venue.
// For lower granularity more or less in the range of zipcode level changes, choose city.
// Choosing Venue here as an example.
trigger.MonitoringScope = VisitMonitoringScope.Venue;
// Associate the trigger with the background task builder
visitTaskBuilder.SetTrigger(trigger);
// If it is important that there is user presence and/or
// internet connection when OnCompleted is called
// the following could be called before calling Register()
// SystemCondition condition = new SystemCondition(SystemConditionType.UserPresent | SystemConditionType.InternetAvailable);
// visitTaskBuilder.AddCondition(condition);
// Register the background task
_visitTask = visitTaskBuilder.Register();
// Associate an event handler with the new background task
_visitTask.Completed += OnCompleted;
UpdateButtonStates();
MainPage.CheckBackgroundAndRequestLocationAccess();
}
