How to push the offline chat messages to server when internet is available

Question

I am building chat application in windows phone 8.1 When internet is not available in the device i am storing all chat messages in sqlite database. I want push those messages to server when internet is available later even thought app is not open/active.
please help me to solve this problem. thank you 
vinay

Answer 1

The best approach likely would be to use triggered background tasks. There is a specifc trigger for "InternetAvailable" which looks like a perfect match for your requirement. This article describes that feature in more detail:
https://msdn.microsoft.com/en-us/library/windows/apps/xaml/hh977058.aspx
If I remember correctly however usage of SQLite in background tasks can be somewhat problematic (my information on that may be old however). My suggestion in that case would be to serialize the messages into an XML file when your App is suspended/closed
which is likely to be a lot easier to handle in the background task (regular storage can remain in the SQLite database).