Book Image

Customizing ASP.NET Core 6.0 - Second Edition

By : Jürgen Gutsch
Book Image

Customizing ASP.NET Core 6.0 - Second Edition

By: Jürgen Gutsch

Overview of this book

ASP.NET Core is packed full of hidden features for building sophisticated web applications – but if you don’t know how to customize it, you’re not making the most of its capabilities. Customizing ASP.NET Core 6.0 is a book that will teach you all about tweaking the knobs at various layers and take experienced programmers’ skills to a new level. This updated second edition covers the latest features and changes in the .NET 6 LTS version, along with new insights and customization techniques for important topics such as authentication and authorization. You’ll also learn how to work with caches and change the default behavior of ASP.NET Core apps. This book will show you the essential concepts relating to tweaking the framework, such as configuration, dependency injection, routing, action filters, and more. As you progress, you'll be able to create custom solutions that meet the needs of your use case with ASP.NET Core. Later chapters will cover expert techniques and best practices for using the framework for your app development needs, from UI design to hosting. Finally, you'll focus on the new endpoint routing in ASP.NET Core to build custom endpoints and add third-party endpoints to your web apps for processing requests faster. By the end of this book, you'll be able to customize ASP.NET Core to develop better, more robust apps.
Table of Contents (18 chapters)

Creating custom Tag Helpers

To use all the custom TagHelper that we will create in this chapter, you need to refer to the current assembly to tell the framework where to find the TagHelper. Open the _ViewImports.cshtml file in the View/ folder and add the following line at the end of the file:

@addTagHelper *, TagHelperSample

Here's a quick example showing how to extend an existing tag using a TagHelper:

  1. Let's assume we need to have a tag configured in bold and colored in a specific color:
    <p strong color="red">Use this area to provide 
      additional information.</p>

This looks like pretty old-fashioned HTML from the 90s, but this is just to demonstrate a simple TagHelper.

  1. The current method to do this task is to use a TagHelper to extend any tag that has an attribute called strong, as shown in the following code snippet:
    using Microsoft.AspNetCore.Razor.TagHelpers;
    namespace TagHelperSample.TagHelpers;