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WCF: Server to client notification

dparkes asked
Last Modified: 2012-05-05
A while back, I asked how I could get a button on a web page to send any kind of notification to a c# client application (without the application having to poll) using .Net.  I was given the superb advice to learn more about WCF.  

So, now I know a very little bit about WCF, and still have the same question.

I now have a service running on my hosted web server that uses basic http binding. (Due to their security I'm not sure if I can use other bindings)  My c# application and my webpage are both calling useful operations on the service.  I love the fact that I can have multiple apps call operations from a web hosted service.

I think this is great, considering how little I knew about soa a couple week ago.  

Maybe there are articles about how I can create something similar like a chat application from the ground up.  But since I already have so much in place, can anyone tell me what the next step is in my attempt to get the server to send a signal to 'wake up' the client application?  Do I need to create a 2nd service that is essentially a service for my c# application, and then have the web server refer to a callback on the application's service?  Or can the basic http service I have now communicate 'both ways'?

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Those links look great.  As long as my web host provider doesn't somehow block it.  

It would have taken me forever to figure out using one of these techniques.  Thanks.

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