How I can have a session id in wcf Service

Question

I\'m coding an authentication service that have multiple methods.one of this method is ChangePassword. I want when any body wants to change the password, logon to system bef

Answer 1

In order to have SessionId, you have to have Session-enabled binding. For example, wsHttpBinding. In your config file, you should have something like:

  <services>
  <service name="MyService">
    <endpoint address="" binding="wsHttpBinding"
    bindingConfiguration="WSHttpBinding_MyServiceConfig"
    contract="IMyService">
      <identity>
        <dns value="localhost" />
      </identity>
    </endpoint>
  </service>
  </services>

In the IMyService interface, you have to have SessionMode attribute set to Required, like so:

[ServiceContract(SessionMode = SessionMode.Required)]
public interface IMyService
{
    [OperationContract]
    AuthenticationData Authenticate(string username, string password);
}

When all of this is setup, you can get to the SessionId like this:

var sessionId = OperationContext.Current.SessionId;

Another way would be to enable AspNetCompatibilityRequirements but it's a bit of an overkill just to get the SessionId.

Answer 2

When use wsHttpBinding in WCF you will find the value of OperationContext.Current.SessionId is null. The Solution is as follows(need two steps):

1. Enable reliableSession to true in the configuration file

   <bindings>
     <wsHttpBinding>
       <binding name ="WSHttpBinding_MyService" sendTimeout="00:05:00" >
         <security mode="None"></security>
         <reliableSession enabled="true"/>
       </binding>
     </wsHttpBinding>
   </bindings>
   

2. In the contract interface, have SessionMode attribute set to Required

   [ServiceContract(SessionMode = SessionMode.Required)]
   public interface IMyService{...}
   

Follow the steps above, the problem will be solved

Answer 3

You can activate the ASP.NET compatibility mode in your WCF service, and have all the benefits of ASP.NET sessions and context.

Add this attribute to your WCF class definition:

[AspNetCompatibilityRequirements(RequirementsMode =
    AspNetCompatibilityRequirementsMode.Required)]

and in your web.config:

<configuration>
  <system.serviceModel>
      <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
  </system.serviceModel>
</configuration>