Question

I’m modifying the code in this tutorial to build some basic subscribe push wcf client/server classes, and I’ve just hit a bit of a brick wall.

The server class in the tutorial is created using the following code:

class Program   {     static void Main(string[] args)     {       using (ServiceHost host = new ServiceHost(         typeof(StringReverser),         new Uri[]{           new Uri('net.pipe://localhost')         }))       {          host.AddServiceEndpoint(typeof(IStringReverser),           new NetNamedPipeBinding(),           'PipeReverse');          host.Open();          Console.WriteLine('Service is available. ' +           'Press <ENTER> to exit.');         Console.ReadLine();          host.Close();       }     }   } 

Which I assume publishes an instance of StringReverser my problem is I need a reference to that instance so I can call a method on it to push data back to the client.

In the tutorial the server just replies to the client using a callback method, instead I’m storing a reference to the client in a list of subscribers. When I need to push data back to the clients I need a reference to the Service object so I can actually utilize do the callback.

Is there a way to publish a Service using WCF that lets you have a reference to the service object? or can I get a reference to the service object from the host object?

Any help would be appreciated…

Answer 1

You can use the singleton pattern in your StringReverser class and pass the instance of it to the ServiceHost constructor:

ServiceHost host = new ServiceHost(   StringReverser.Instance,   new Uri[]{new Uri('net.pipe://localhost')} );