Professional ASP.NET MVC 4

Controller Basics

Getting started with MVC presents something of a chicken and egg problem: There are three parts (model, view, and controller) to understand, and it's difficult to really dig into one of those parts without understanding the others. To get started, you'll first learn about controllers at a very high level, ignoring models and views for a bit.

After learning the basics of how controllers work, you'll be ready to learn about views, models, and other ASP.NET MVC development topics at a deeper level. Then you'll be ready to circle back to advanced controller topics in Chapter 15.

A Simple Example: The Home Controller

Before writing any real code, we'll start by looking at what's included by default in a new project. Projects created using the Internet Application template include two controller classes:

• HomeController: Responsible for the “home page” at the root of the website, as well as an “about page” and a “contact page”
• AccountController: Responsible for account-related requests, such as login and account registration

In the Visual Studio project, expand the /Controllers folder and open HomeController.cs, as shown in Figure 2.7.

Figure 2.7

Notice that this is a pretty simple class that inherits from the Controller base class. The Index method of the HomeController class is responsible for deciding what will happen when you browse to the homepage of the website. ...