class proxy (apicontroller) and constructor args

[grofit]

I have read in historical articles/tickets/posts that if you want to do proxying on classes you need to provide a parameterless constructor. I was just wondering is this still applicable, and if so is it a problem within the ninject layer or castle dynamic proxy layer?

As if I have a class like:

public class SomeClassToProxy
{
   public SomeClasstoProxy(ISomething something) { ... }

   [SomeInterceptAttribute]
   public virtual DoSomething() { ... }
   
}

And lets assume somewhere I have Bind<ISomething>().To<Something>();, so the DI framework knows about the ISomething and how to resolve it, so when it says it needs a parameterless constructor I am unsure why it causes a problem when I am binding against the class opposed to the interface, as even if I proxy against an interface (i.e. public class SomeClassToProxy : ISomeInterfaceToProxy) and have the binding at the interface layer it still needs to resolve the SomeClassToProxy at some point.

Anyway some info around this issue would be great as atm the moment we try to put any intercept attributes on an ApiController DynamicProxy blows up because it cannot find a parameterless constructor.

[spam1923]

For this I used the Ninject.Web.WebApi or if you do MVC its in the Ninject.Web.MVC package. There is a syntax I have used to put ActionFilters on Controllers when an Attribute exists. To do this I put these lines in with my Bindings that execute on start.

using Ninject.Web.WebApi.FilterBindingSyntax;
using Ninject.Web.Mvc.FilterBindingSyntax;

//MVC Example
            this.Kernel.BindFilter<YourActionFilterClass>(System.Web.Mvc.FilterScope.Action, 3).WhenActionMethodHas<YourAttributeUsedOnControllerToTriggerFilter>();
            this.Kernel.BindFilter<YourActionFilterClass>(System.Web.Mvc.FilterScope.Controller, 4).WhenControllerHas<YourAttributeUsedOnControllerToTriggerFilter>();

//WebApi Example
            this.Kernel.BindHttpFilter<YourActionFilterClass>(System.Web.Http.Filters.FilterScope.Action).WhenActionMethodHas<YourAttributeUsedOnControllerToTriggerFilter>();
            this.Kernel.BindHttpFilter<YourActionFilterClass>(System.Web.Http.Filters.FilterScope.Controller).WhenControllerHas<YourAttributeUsedOnControllerToTriggerFilter>();

In my case my Filters Inherited from one of these System.Web.Mvc.IAuthorizationFilter, System.Web.Http.Filters.IAuthorizationFilter depending on whether the filter is for WebAPI or MVC