Windows® Phone 8 Unleashed

Subscribing to Push Notification

To subscribe to push notification within an app, we first attempt to retrieve an existing HttpNotificationChannel by name.

channel = HttpNotificationChannel.Find("<a channel name>");

The HttpNotificationChannel.Find method does not raise an Exception and returns null if the channel with the specified name is not found. If so, a new instance must be created.

The Push Notification sample in the downloadable code contains a class called PushNotificationSubscriber, which manages subscription to the MPNS by wrapping a notification channel. The main benefit of using a wrapper for the notification channel is that if the PushNotificationSubscriber instance is unable to perform the subscription to the MPNS, due to the ...