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ASP.NET Core 2 Fundamentals

You're reading from   ASP.NET Core 2 Fundamentals Build cross-platform apps and dynamic web services with this server-side web application framework

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Product type Book
Published in Aug 2018
Publisher
ISBN-13 9781789538915
Pages 298 pages
Edition 1st Edition
Languages
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Authors (2):
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Onur Gumus Onur Gumus
Author Profile Icon Onur Gumus
Onur Gumus
Mugilan T. S. Ragupathi Mugilan T. S. Ragupathi
Author Profile Icon Mugilan T. S. Ragupathi
Mugilan T. S. Ragupathi
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Toc

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.

Note

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...

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