public async void Run(IBackgroundTaskInstance taskInstance)
{
var deferral = taskInstance.GetDeferral();
// The user selected this app to be the communication blocking app.
// Set the list of blocked numbers.
if (CommunicationBlockingAppManager.IsCurrentAppActiveBlockingApp)
{
// If there are no saved blocked numbers, then default to an empty list.
var blockedNumbers = ApplicationData.Current.LocalSettings.Values["blockedNumbers"] as string[];
await PhoneCallBlocking.SetCallBlockingListAsync(blockedNumbers ?? new string[] { });
}
deferral.Complete();
}
private async Task UpdateBlockListAsync()
{
await PhoneCallBlocking.SetCallBlockingListAsync(BlockedNumbers);
// Save the new blocked numbers list in our private storage.
var settings = ApplicationData.Current.LocalSettings;
if (BlockedNumbers.Count > 0)
{
settings.Values["blockedNumbers"] = BlockedNumbers.ToArray <string>();
}
else
{
settings.Values["blockedNumbers"] = null;
}
}