Question

I want to create a push web application.

The service layer is built on WCF.

The presentation layer is built on Asp.net 4

The service listens to events and updates its static property (a shared collection list) from the data layer.
I am polling in my presentation layer and calling a method of WCF every second and getting the updated collection.

If a collection is unmodified, I return empty list to save network bandwidth.

To save the round trips, I want the WCF service to publish an event if and when the collection is modified. Is that possible? How do I achieve this?

Thank you

Answer 1

WCF services allows duplex communication, so it can send messages to client.