protected override void OnNavigatedTo(NavigationEventArgs e)
{
// Set our initial UI state based on whether the background task is registered.
IBackgroundTaskRegistration taskRegistration = MainPage.FindBackgroundTaskRegistration();
UpdateBackgroundTaskUIState(taskRegistration != null);
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (MainPage.FindBackgroundTaskRegistration() == null)
{
rootPage.NotifyUser(TaskNotRegisteredMessage.Text, NotifyType.ErrorMessage);
OpenSettingsButton.IsEnabled = false;
}
}
// Handle request to unregister the background task
private void UnregisterTask()
{
IBackgroundTaskRegistration taskRegistration = MainPage.FindBackgroundTaskRegistration();
if (taskRegistration != null)
{
taskRegistration.Unregister(true);
rootPage.NotifyUser("Unregistered Caller ID background task.", NotifyType.StatusMessage);
}
UpdateBackgroundTaskUIState(false);
}