How to add OperationBehavior for all operations on IIS hosted WCF service?

Question

I have a custom OperationBehavior. I would like to apply it for all operations at once. Unfortunately, OperationBehaviors cannot be configured per entire service or in web.config.

When hosting WCF service in a test application, I can do the following:

        foreach (var ep in _serviceHost.Description.Endpoints)
        {
            foreach (OperationDescription od in ep.Contract.Operations)
            {
                od.Behaviors.Add(new MyOperationBehavior());
            }
        }

        _serviceHost.Open();

But how do I do it in a IIS hosted web application?

I tried to get OperationContext.Current.Host.Description.Endpoints in Application_Start but of course OperationContext.Current is not available before any operation has started, so my approach fails.

score 5 · Accepted Answer · answered Feb 15 '13 at 17:46

You can use a ServiceHostFactory to do that. With it, you can get access to the OM prior to the service being opened.

This is an example:

public class MyFactory : ServiceHostFactory
{
    protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses)
    {
        ServiceHost host = base.CreateServiceHost(serviceType, baseAddresses);
        foreach (var ep in host.Description.Endpoints)
        {
            foreach (OperationDescription od in ep.Contract.Operations)
            {
                od.Behaviors.Add(new MyOperationBehavior());
            }
        }

        return host;
    }
}

And you can get more information about service host factories at http://blogs.msdn.com/b/carlosfigueira/archive/2011/06/14/wcf-extensibility-servicehostfactory.aspx

score 1 · Answer 2 · answered Feb 18 '13 at 08:50

At the end I found an alternative solution: use a contract behavior which injects any other behvaior as needed. Like this:

public class InjectAllOperationsBehavior : Attribute, IContractBehavior
{
    private IOperationBehavior _operationBehavior = null;

    public InjectAllOperationsBehavior(Type operationBehaviorType)
    {
        _operationBehavior = 
            (IOperationBehavior)Activator.CreateInstance(operationBehaviorType);
    }

    public void ApplyDispatchBehavior(ContractDescription contractDescription, ServiceEndpoint endpoint, DispatchRuntime dispatchRuntime)
    {
        foreach (OperationDescription opDescription in contractDescription.Operations)
        {
            opDescription.Behaviors.Add(_operationBehavior);
        }
    }

... other IContractBehavior methods can be left empty. You might want also to use the ApplyClientBehavior method with the same code from the ApplyDispatchBehavior method.

How to add OperationBehavior for all operations on IIS hosted WCF service?

2 Answers2