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This article gives a simple tutorial on developing ASP.NET applications in MVC pattern.

One of the recent developments in ASP.NET is the MVC (Model–View–Controller) design pattern. MVC pattern isolates the application logic for the users from input and presentation (GUI).
According to Scott Guthrie, MVC pattern has the following advantages:

• One of the benefits of using a MVC methodology is that it helps enforce a clean separation of concerns between the models, views and controllers within an application. Maintaining a clean separation of concerns makes the testing of applications much easier, since the contract between different application components are more clearly defined and articulated.
• The MVC pattern can also help enable red/green test driven development (TDD) - where you implement automated unit tests, which define and verify the requirements of new code, first before you actually write the code itself.

The following picture borrowed from Wikipedia shows the MVC pattern:

MVC divides an application into three concerns:

• Model - Encapsulates core application data and functionality Domain Logic.
• View - obtains data from the model and presents it to the user.
• Controller - receives and translates input to requests on the model or the view.

Scott Guthrie gave a very good and detailed introduction on applying MVC pattern to ASP.NET projects in his blog. For obvious reasons, his introduction is very comprehensive and authoritative. It should be the first reference for application developers who want to understand ASP.NET MVC.
This article is intended to give a simpler tutorial on developing ASP.NET MVC applications in the Microsoft Visual Studio context to help application developers to get a quick start.
When working on ASP.NET MVC web sites, the first thing you may notice is that the URLs to access the web pages are no longer the familiar "http://www.codeproject.com/info/search.aspx" style. Instead the URLs will look likehttp://localhost/VirtualDirectoryName/Controller/Action.
After reading this article, hopefully you will be able to quickly develop your own ASP.NET MVC web applications in Visual Studio. The article is intended to answer the following questions:

• How are the ASP.NET MVC URLs associated to the resources on the web server?
• In ASP.NET, what are the Models, Views, and Controllers and how are they implemented?
• How is information passed among the Models, Views, and Controllers?
• How does the application code on the server access the data passed to the server by URL parameters and form submissions from the browser?
• How to access the session data in ASP.NET MVC?
• How to use code behind when implementing the Views?

This tutorial application is developed in Visual Studio 2008, and the language used is C#. If you have Visual Studio 2010, your environment may be different.
This article comes with the source code for this tutorial. It may be a good idea if you download the source code and run it in your Visual Studio before you start to read this tutorial. This should give you a better idea on the functions implemented in this simple tutorial ASP.NET MVC application. This should make your reading of this article easier. If you are unable to load the source code in your Visual Studio, you may need to first set up your development environment.
Let us begin the tutorial by first setting up our development environment.

Set up the Development Environment

In order to develop MVC ASP.NET applications, you will need to install the Visual Studio ASP.NET MVC Add-on. If you have not done so, you can go to the Microsoft web site to download the Add-on and install it on your computer.

Create an Empty MVC ASP.NET Project in Visual Studio

fter installing the ASP.NET MVC Add-on, we can start to create an ASP.NET MVC project in Visual Studio.


We can create two types of ASP.NET MVC applications. In this tutorial, we will create an "ASP.NET MVC 2 Empty Web Application". Give the project the name "ASPNetMVCTutorial" and browse a folder where you want to save the files that the Visual Studio will be generating and click the "OK" button.
After the project is created, the solution explorer will have the following contents:


In order to better focus on the MVC pattern in this ASP.NET development, I will be limiting the use of JavaScripts, and CSS style sheets. Let us delete the folders that are not MVC related and add a folder called "Utilities". The "Utilities" folder will be later used to add some utility classes to the project. After the cleaning, the solution explorer will have the following contents: