ASP.NET Core in Action, Second Edition

20 Building custom MVC and Razor Pages components

This chapter covers

• Creating custom Razor Tag Helpers
• Using view components to create complex Razor views
• Creating a custom DataAnnotations validation attribute
• Replacing the DataAnnotations validation framework with an alternative

In the previous chapter, you learned how to customize and extend some of the core systems in ASP.NET Core: configuration, dependency injection, and your middleware pipeline. These components form the basis of all ASP.NET Core apps. In this chapter we’re focusing on Razor Pages and MVC/API controllers. You’ll learn how to build custom components that work with Razor views. You’ll also learn how to build components that work with the validation framework used by both ...