MVC

What is MVC Pattern?

Model View Controller. MVC pattern seperates the GUI from the Data.
It is commonly used in ADO.NET programming in ASP.NET(example)

MVC in context with ADO.NET/ASP.NET

MVC pattern separates objects in to three important sections:-

Model: - This section is specially for maintaining data. It is actually where we write
code for database connectivity, methods of DataReader, DataAdapter, properties
for passing data and writing validations
eg: Business Access Layer class, Data Access Layer class.

View: - Design of the .aspx page (The markup or the presentation layer)

Controller: - They are event handling section which affects either the model or the view. (eg: .aspx.cs)

Difference between a Layer and Tier?

Layer:
It refers to the separation of the logic (i.e the code and design) that is developed for an application in different files.

Tier:
It refers to the physical location of the Layer files. 

Advantages of an MVC-Based Web Application

The ASP.NET MVC framework offers the following advantages:

·         It makes it easier to manage complexity by dividing an application into the model, the view, and the controller.

·         It does not use view state or server-based forms. This makes the MVC framework ideal for developers who want full control over the behavior of an application.

·         It uses a Front Controller pattern that processes Web application requests through a single controller. This enables you to design an application that supports a rich routing infrastructure. For more information

·         It provides better support for test-driven development (TDD).

·         It works well for Web applications that are supported by large teams of developers and for Web designers who need a high degree of control over the application behavior.