Ninject.Web.Mvc add-on not working with ASP.NET MVC 2

Question

I'm using the Ninject.Web.Mvc (the MVC 2 version) add-on with ASP.NET MVC 2. This is an excerpt of my Global.asax.cs:

protected override void OnApplicationStarted()
{
    AreaRegistration.RegisterAllAreas();
    RegisterRoutes(RouteTable.Routes;
    // RegisterAllControllersIn() is not available in the MVC 2 version of Ninject
}

protected override IKernel CreateKernel()
{
    var kernel = new StandardKernel();
    kernel.Bind<IRepository>().To<NHibernateRepository>();

    return kernel;
}

I also have a base RepositoryController:

public class RepositoryController : Controller
{
    protected IRepository Repository { get; set; }

    public RepositoryController()
    {

    }

    public RepositoryController(IRepository repository)
    {
        Repository = repository;
    }
}

So as you can see, it's a very simple setup where RepositoryController expects to be injected with an instance of an IRepository, and Ninject is configured to use a concrete instance of NHibernateRepository. However, this doesn't work and the Repository property is null whenever I try to access it in a controller. However, if I change the code to this instead:

[Inject]
public IRepository Repository { get; set; }

Then it works fine. Does anyone know why constructor injection isn't working, but property injection is?

Answer 1

Try removing the parameterless constructor.

Ninject might be picking the wrong constructor to resolve.

To test it out, you could put a breakpoint in both constructors and see which one fires, but I have a feeling it's the parameterless one.