Dependency Injection at (Action)Method level, the easy way!

If, for whatever reason (I’m not going into this discussion), you’d like to inject your dependencies at the method level instead of using your constructor, like so:

public ActionResult Post(Whatever whatever, IMyDependency dependency)
{
	// use dependency here
}

Just create these two classes:

public class DependencyModelBinderProvider : IModelBinderProvider
{
	public IModelBinder GetBinder(Type modelType)
	{
		return modelType.IsAbstract ? new DependencyModelBinder() : null;
	}
}

public class DependencyModelBinder : IModelBinder
{
	object IModelBinder.BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
	{
		return DependencyResolver.Current.GetService(bindingContext.ModelType);
	}
}

And, of course, at bootstrap/app start time:

ModelBinderProviders.BinderProviders.Add(new DependencyModelBinderProvider());

Voilà, DI at method level in 2 minutes!