State Management in WCF

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Hi All,
I am working on a migration project in which I am rewriiting a web service (.asmx) to a WCF service.

My old service has some code like this.

Application[strSession] = LstUserSessionTrack;

The above code is using the Application object of ASP.NET to maintain state. Application object is not available in WCF.

I am looking for some object in WCF which is equivalent to the Application object.I want to implement state management in WCF.

Kindly suggest.

Thanks.

"Happy Coding"

Posted 25-Jun-13 22:57pm

TapasU

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Michael Parshin · Answer 1 · 2013-06-26T00:05:00

Hi,

You don't have direct equivalent in WCF for an Application.

But you can maintain state per session with InstanceContextMode.PerSession in ServiceBehavior like this:

C#

[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)]
public class Service : IService
{
}

WCF will create instance for each session initiated by your clients. You can control on a service contract which operation is initiating

[OperationContract(IsInitiating = true)]

and wich is terminating

C#

[OperationContract(IsTerminating = true)]

You can also make your service implementation class disposable, so WCF will call Dispose method whenever session is ended.

Last thing - you have to choose binding that supports sessions, like NetHttpBinding for instance.

Good luck,

Michael Parshin