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copied!<p>Locating the different building blocks is done in the request life cycle. One of the first steps in the ASP.NET MVC request life cycle is mapping the requested URL to the correct controller action method. This process is referred to as routing. A default route is initialized in the Global.asax file and describes to the ASP.NET MVC framework how to handle a request. Double-clicking on the Global.asax file in the MvcApplication1 project will display the following code:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using System.Web.Routing; namespace MvcApplication1 { public class GlobalApplication : System.Web.HttpApplication { public static void RegisterRoutes(RouteCollection routes) { routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Home", action = "Index", id = "" } // Parameter defaults ); } protected void Application_Start() { RegisterRoutes(RouteTable.Routes); } } } </code></pre> <p>In the Application_Start() event handler, which is fired whenever the application is compiled or the web server is restarted, a route table is registered. The default route is named Default, and responds to a URL in the form of <a href="http://www.example.com/" rel="nofollow noreferrer">http://www.example.com/</a>{controller}/{action}/{id}. The variables between { and } are populated with actual values from the request URL or with the default values if no override is present in the URL. This default route will map to the Home controller and to the Index action method, according to the default routing parameters. We won't have any other action with this routing map.</p> <p>By default, all the possible URLs can be mapped through this default route. It is also possible to create our own routes. For example, let's map the URL <a href="http://www.example.com/Employee/Maarten" rel="nofollow noreferrer">http://www.example.com/Employee/Maarten</a> to the Employee controller, the Show action, and the firstname parameter. The following code snippet can be inserted in the Global.asax file we've just opened. Because the ASP.NET MVC framework uses the first matching route, this code snippet should be inserted above the default route; otherwise the route will never be used.</p> <pre><code>routes.MapRoute( "EmployeeShow", // Route name "Employee/{firstname}", // URL with parameters new { // Parameter defaults controller = "Employee", action = "Show", firstname = "" } ); </code></pre> <p>Now, let's add the necessary components for this route. First of all, create a class named EmployeeController in the Controllers folder. You can do this by adding a new item to the project and selecting the MVC Controller Class template located under the Web | MVC category. Remove the Index action method, and replace it with a method or action named Show. This method accepts a firstname parameter and passes the data into the ViewData dictionary. This dictionary will be used by the view to display data.</p> <p>The EmployeeController class will pass an Employee object to the view. This Employee class should be added in the Models folder (right-click on this folder and then select Add | Class from the context menu). Here's the code for the Employee class:</p> <pre><code>namespace MvcApplication1.Models { public class Employee { public string FirstName { get; set; } public string LastName { get; set; } public string Email { get; set; } } } </code></pre>

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