问题
My mobile application needs to ping web service (WCF) periodically to get the latest data from server. The problem is, this is done periodically even if there isn't anything new on the server. Is there any way that Server notifies device about the change? Like Push Notification? I have read that Push Notifications can be done by SMS and Email. But, both has disadvantages.
回答1:
You can try with long lived HTTP requests...
http://msdn.microsoft.com/en-us/library/aa446486.aspx
来源：https://stackoverflow.com/questions/4966133/windows-mobile-6-0-6-5-push-notification