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

Handling client requests

Every time we implement a class, we should always bear the single responsibility principle in mind. Therefore, the action methods inside our controllers should be simple handlers that call methods that act as data. The controllers in an ASP.NET Core service usually behave as follows:

• They make calls other classes in order to obtain or update data held in, for example, a repository class.
• They handle exceptions. The action methods typically wrap the calls of other objects to catch exceptions. These are then presented to the client.
• They enhance the returned data using the required HTTP conventions.

Let's proceed and build our controller class by creating a new OrderController type inside the Controllers folder. This ...