Our desktop application require to be updated directly when a mobile employee sends any message from his/her windows phone 7 mobile.
Currently our requirement is that send a message from our desktop application to a Windows Phone 7.5 which we are able to achive easily using PUSH Notifications, Now when the user takes some action against the sent message the windows phone app calls the WCF service and pass the message to that WCF which receives the message and puts into the database and application reads it later and this is where problem lies. Because our WCF is putting that message into database our application is polling it every 5 second and if any replies received from any of our drivers then it is updating the UI.
What we want to achieve is when we receive any reply our desktop applicaton should be notified automatically and udpates the UI and then put it into the database.
So please share your experience on this issue.
Thanks
Why not update the WCF service to notify any registered “listeners” (i.e. running instances of your client app) that the database has been updated with new information?
You could do this by having your service expose a service that can be called by clients wanting to register for some/all event types. The client app(s) host a service implementing a callback contract that the service can call when the registered events are raised.
There’s a good MSDN article one-way, callback and pub-sub messaging with WCF: http://msdn.microsoft.com/en-us/magazine/cc163537.aspx.
Be sure to keep track of and throttle how many events your client app is receiving per second – the last thing you want to have happen is for 100 client apps to all hit the server 50 times each if 50 events are raised sumultaneously!