What is MVP pattern?
Ans. This pattern is similar to MVC pattern in which controller has been replaced by the presenter. This design pattern splits an application into three main aspects: Model, View and Presenter.
Model - The Model represents a set of classes that describes the business logic and data. It also defines business rules for data means how the data can be changed and manipulated.
View - The View represents the UI components like CSS, jQuery, html etc. It is only responsible for displaying the data that is received from the presenter as the result. This also transforms the model(s) into UI.
Presenter - The Presenter is responsible for handling all UI events on behalf of the view. This receive input from users via the View, then process the user's data with the help of Model and passing the results back to the View. Unlike view and controller, view and presenter are completely decoupled from each other’s and communicate to each other’s by an interface.
Also, presenter does not manage the incoming request traffic as controller.
This pattern is commonly used with ASP.NET Web Forms applications which require to create automated unit tests for their code-behind pages. This is also used with windows forms.
Key Points about MVP Pattern
1. User interacts with the View.
2. There is one-to-one relationship between View and Presenter means one View is mapped to only one Presenter.
3. View has a reference to Presenter but View has not reference to Model.
4. Provides two way communication between View and Presenter.