ASP.NET Core controllers

Now that MVC knows the names of the controller and action, it will look for a class that implements an interface named IController. To simplify the requirements, Microsoft supplies a class named Controller that your classes can inherit from.

The responsibilities of a controller are as follows:

• To extract parameters from the HTTP request
• To use the parameters to fetch the correct model and pass it to the correct view
• To return the results from the view to the client as an HTTP response

Defining the Home controller's actions

In the Solution Explorer window, expand the Controllers folder and double-click on the file named HomeController.cs:

public class HomeController : Controller
{
    public IActionResult Index()
    {
        return View();
    }
    public IActionResult About()
    {
        ViewData["Message"] = "Your application description page.";
        return View();
    }
    public IActionResult Contact()
    {
        ViewData[&quot...