Question

I have a base class that has a repository injected into the constructor, now any class that I derive off of it now also needs those parameters, but the repository is only used by the base class, is there a way to bind Ninject to just the base class and not go through the constructor? And most importantly, is it a good idea?

public class HtmlPageModel
{

        private readonly IHtmlPageRepository _repository;

        public HtmlPageModel (IHtmlPageRepository repository)
        {
            _repository = repository;

        }
}


public class VideoPageViewModel : HtmlPageModel 
{

        public VideoPageViewModel(IHtmlPageRepository repository) : base(repository)
        {

        }
    }

Answer 1

View models shouldn’t have dependencies at all. Inject the repository into the controller and assign the values from there.

Also if many pages are using the same base view model this indicates that some part of the page is shown in many situations or even all the time. In this case it is better to have a custom controller and view for this area and use Html.RenderAction to render this part.