By using the ‘route’ attribute, URL structure can be defined. If we decorate the ‘GotoAbout’ action with the route attribute, the route attribute says that ‘GotoAbout’ can be invoked using the ‘Users/about’ URL structure. This function is required when we call render() manually before the end of a given action. This function is called before the view is rendered and after controller action logic. Add custom functionality and customize the user interface to fit specific use cases. Build exceptional websites using the MVC development model.

The handler can be a physical file, such as a .aspx file in a Web Forms application. A handler can also be a class that processes the request, such as a controller in an MVC application. To define a route, you create an instance of the Route class by specifying the URL pattern, the handler, and optionally a name for the route.

What is the function of beforeRender() in the controller?

Razor provides a new view engine with a streamlined code for focused templating. Razor’s syntax is very compact and improves the readability of the markup and code. By default, MVC supports ASPX (web forms) and Razor View Engine.

After that I create a controller action in User Controller (UserController.cs under Controllers folder). That action method has logic for the required validation for Name and Email validation on the Email field. I add an error message on ModelState with a key and that message will be shown on the view whenever the data is not to be validated in the model. The problem is that if the exceptions are not handled, then the default MVC behavior shows the dreaded yellow screen of death. This filter can be stored inside the Filters folder in the web project of the solution.

Building MVC modules

It indicates whether more than one instance of the error filter attribute can be specified. Name of the view page for displaying the exception information. If this property is not specified then the HandleError filter handles all exceptions. The HandleError Error attribute has a couple for properties that are very useful in handling the exception.

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