How to Configure Sessions in WCF?

How to Configure Sessions in WCF?

To configure sessions in WCF, one should know the following three elements:

1. Binding – Because all bindings do not support sessions. Only WS-*, NetTcpBinding andNetNamedPipeBinding have session support so selection of appropriate binding is necessary.
2. SessionMode – This service contract specifies service’s possible expectation for session from incoming client request. It has three self describing values:
   • Allowed – Service can accept sessionful clients as well as sessionless.
   • Required – Service will entertain only those clients who have session, sessionless client cannot connect to service.
   • NotAllowed – Service can interact only with sessionless clients. Just opposite to Required.
3. InstanceContextMode – This is a service behavior that controls instantiation of actual service class. It has the following values:
• PerCall – Each request made to server will be served by a new instance of service class.
• PerSession – A Session will have its dedicated service instance and all requests pertaining to the session will be served by that instance only. All sessions will have their individual dedicated service instances.
• Single –All requests to the service will be served by a single unique instance of service class

4. [ServiceContract(SessionMode = SessionMode.Allowed)]
    public interface Iservice
    {
       //some code…
    }

5. [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)]
    public class serviceclass : Iservice
    {
       // some code…
    }