Question : C# design question

Hi,

I have an application I have designed using the MVP pattern.

I have an application presenter which is fed into higher level presenters that are used for each view.  There are some methods in the application presenter that I want to be able to expose to the views without exposing all of the application presenter.  These methods also need to be called directly on the application presenter instance.

The way I have done this is to create an interface with the methods I want to expose.  This interface is inherited and implemented by the application presenter.

I then created an abstract class whose constructor requires an instance of the interface.  This abstract class is then inherited by each of the top-level presenters which in turn exposes them to the views.

Here is the code:

public interface ISwitchView
    {
        void SwitchToChartView(bool displayInModalDialogBox);
        void SwitchToSaveModelResultsView(bool displayInModalDialogBox);
        void SwitchToLoginView();
        void SwitchToResultsView();
        void SwitchToSaveLoadNetworkView();
        void SwitchToLaneClosureView();
        void SwitchToLaneClosureView(LaneClosure lc);
        void SwitchToTrafficVolumeView();
        void SwitchToTrafficVolumeView(VehicleInput vi);
        void CloseDialog();
        void RenderNetwork();
    }

public abstract class SwitchView
    {
        private readonly ISwitchView _controller;      
        public SwitchView(ISwitchView appPresenter)
        {
            _controller = appPresenter;                      
        }

        public ISwitchView View
        {
            get { return _controller; }
        }      

then, in the top level presenters I inherit SwitchView as follows

 public class ResultsPresenter : SwitchView
    {
        private readonly ApplicationPresenter _controller;

        public Presenter(ApplicationPresenter controller) : base(controller)
        {    
             _controller = controller      
        }

Does all of this seem reasonable or is there a better way of doing it?

Thank you.

Answer : C# design question

OK, then, given what you've told me, I see nothing wrong with your approach, and I think you've made appropriate choices for your design.  Do you have any other questions?