How WHATSAPP push notification works in windows phone?

Question

I am a Windows lover and a windows phone developer.

I am developing apps targeting windows phone. Since My latest app needs push notification, I implemented it using WNS [Windows Push Notification Service]. It works well in all devices.

But I am facing a drawback on this because we don't have any extra api service for getting the notification list. So a user can see his notification only by tapping on it in the notification bar. If a user swipe it over means , user can't access it any more.

• Noticed same in Whatsapp windows application,
• Whatsapp is not running foreground/background, Number of notifications are shown in the action center.
• Internet connection makes turned off, And tap on any notification.
• WhatApp application opens, and we can see that all messages are updated in the queue of each user/group.

How this is handled? What technique used in it ? Can we store toast list in background ? Please find the related link How to handle WNS push notifications in Windows Phone 8.1 -silverlight

Thanks

Answer 1

After a wide search I found a solution for handling to store notification data when application is not running by adding Background Service (Windows Runtime Component) Lib. Then we can user Raw notification for providing data from the server. Raw notification will work on background task.

reference Windows Phone 8.1 Background task: crashes when debugging