Book Image

ASP.NET Core 2 Fundamentals

By : Onur Gumus, Mugilan T. S. Ragupathi
Book Image

ASP.NET Core 2 Fundamentals

By: Onur Gumus, Mugilan T. S. Ragupathi

Overview of this book

The book sets the stage with an introduction to web applications and helps you build an understanding of the tried-and-true MVC architecture. You learn all about views, from what is the Razor view engine to tagging helpers. You gain insight into what models are, how to bind them, and how to migrate database using the correct model. As you get comfortable with the world of ASP.NET, you learn about validation and routing. You also learn the advanced concepts, such as designing Rest Buy (a RESTful shopping cart application), creating entities for it, and creating EF context and migrations. By the time you are done reading the book, you will be able to optimally use ASP.NET to develop, unit test, and deploy applications like a pro.
Table of Contents (14 chapters)

Role of the Controller in ASP.NET MVC Applications

A controller does the job of receiving the request and producing the output based on the input data in ASP.NET MVC. You can imagine controllers as the entrance point to your business flow that organizes the application flow.


If you are intending to write a complex application, it is best to avoid business logic in your controllers. Instead, your controllers should call your business logic. In this way, you can keep the core part of your business technology-agnostic.

At the high level, the controller orchestrates between the model and the view, and sends the output back to the user. This is also the place where authentication is usually done through action filters. Action filters are basically interceptors and will be discussed in detail in the Filters section of this chapter. The following diagram illustrates the high-level flow of a request (with the steps) in ASP.NET MVC and shows us how the controller fits into the big picture:

The following...