WCF - Callback and/or Event

Question

How can I receive a message from one client and Callback to all Clients connected to the Host to send that message?

Answer 1

This is called a "publish-and-subscribe" service - there's a number of ways you can achieve this in WCF - see those blog posts and articles for more information:

• Building your own ESB - Publish / Subscribe
• Using Callback Contracts in WCF for Asynchronous Publish/Subscribe Event-Style Communication
• Design Patterns: List-Based Publish-Subscribe
• Windows Azure – Service Bus Publish/Subscribe Example

Marc