如何从控制器层调用View层上的方法？

Question

Sorry if this is a supid question. I have acquainted with c # for 2 months. I have created a winform app, which is designed follow by MVC pattern. Now, I get a problem: I want to call a method on View, from Controller layer.

On View layer, I wanto show Login form when ShowLoginForm() is called.

On controller layer, I have a timer control. I set schedule time to import my data to DB automatically. because my data is downloaded from my server, I need declare username\\password via Login form on View.

private void ImportToDB()
    {            
        if (myControllerObject.GetServerConnection() == null)
        {
            //call ShowLoginForm() on View
        }
        //my code which i want to do
    }

How do I do to solve this problem? Could you suggest me some technical (I thought delegate, callback)?

Answer 1

As per the MVC pattern:

• The controller builds a model
• The view is rendered based on the aforementioned model

The easiest solution I can think of is adding a dedicated bool ShowLoginForm property in the model.