Hands-On RESTful Web Services with ASP.NET Core 3

Identifying controllers

Controllers and actions are usually decorated with attributes and filters in a sort of meta-programming style, which allows developers to understand the purpose of the implemented code. ASP.NET Core follows a set of criteria to find the controllers in our project, usually by using a filesystem convention. Controllers are generally stored in the Controllers folder.

In order to be identified by the routing system, a controller class needs to be compliant with one of the following rules:

• The class is suffixed with Controller, or it inherits from a class that has the Controller suffix
• The class is decorated with the [Controller] or the [ApiController] attribute, which identifies it as a controller class

As we mentioned ...