How deeply does ASP.NET Core in Action, 3e cover ControllerBase?

Explains the base class, helper methods, inheritance choice, routing, serialization, and basic success and error responses.

ControllerBase

As explained in ASP.NET Core in Action, 3e

The Controller base class is the ASP.NET Core MVC base class that provides controller infrastructure, including access to an IUrlHelper.

ControllerBase is the usual base class for ASP.NET Core web API controllers. It supplies controller infrastructure and helper methods for generating HTTP results, without the Razor view features associated with the MVC Controller class. section 20.1

A ControllerBase-derived controller typically works with:

[ApiController], which applies common web API conventions. section 20.1
Action methods that return data directly or return ActionResult values for conditions such as not found. section 20.1
Routing attributes such as [HttpGet("fruit")] to expose actions as HTTP endpoints. section 20.1

A small web API controller

Declare `public class FruitController : ControllerBase`, add `[ApiController]`, and define an `[HttpGet("fruit")]` action returning `IEnumerable<string>`. A GET request to `/fruit` returns the list as JSON with a 200 OK response. An action returning `ActionResult<string>` can instead call `NotFound()` when an identifier is invalid.

How ASP.NET Core in Action, 3e covers it

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Also explained in

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Pro ASP.NET Core 7, Tenth EditionControllerBase is the ASP.NET Core base class that provides controller behavior and helper methods for creating action results.

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Related concepts

controllerincludes · A controller is a software component or architectural role that receives inputs or requests and coordinates their handling by other parts of an application.
result resourceproduces · An action result is an abstraction representing the outcome or response produced by an API action, including a typed value or HTTP response.
ViewBagused by · ViewBag is a dynamic ASP.NET Core MVC property bag for passing unstructured data from a controller or view component to a view.
View methodhas part · A View method is an MVC controller method that creates a result for rendering a view, typically selecting the view from the action context.
IUrlHelperproduces · IUrlHelper is an ASP.NET Core interface for generating URLs from routing information for application actions and endpoints.

This explainer was generated by Manning's knowledge graph from the text of ASP.NET Core in Action, 3e. The section links point to the parts of the book it draws on.