signalR and CustomTypeConverter

Question

I\'m want to serialize derived type as explained here but for signalR I want to implement my custom converter derived from JsonConverter

I added it to signalR as f

Answer 1

This has been driving me nuts for hours. Thanks to halter73's comment I was able to come up with a workaround for the problem in my special situation: I need the pipeline to create interface instances for me which does not work out of the box. So the solution was the following:

class CustomResolver : Microsoft.AspNet.SignalR.Hubs.DefaultParameterResolver
{
    public override object ResolveParameter( Microsoft.AspNet.SignalR.Hubs.ParameterDescriptor descriptor, Microsoft.AspNet.SignalR.Json.IJsonValue value )
    {
        if( descriptor.ParameterType.IsInterface )
        {
            object TargetObject = <Create the object instance here>
            return value.ConvertTo( TargetObject.GetType() );
        }
        else
        {
            return value.ConvertTo( descriptor.ParameterType );
        }
    }
}

Then before you call

WebApp.Start()

Register this new parameter resolver with:

GlobalHost.DependencyResolver.Register( typeof( Microsoft.AspNet.SignalR.Hubs.IParameterResolver ), () => new CustomResolver() );