Book Image

ASP.NET Core 6 and Angular - Fifth Edition

By : Valerio De Sanctis
Book Image

ASP.NET Core 6 and Angular - Fifth Edition

By: Valerio De Sanctis

Overview of this book

Every full-stack ninja needs the tools to operate on front-end and back-end application development. This web app development book takes a hands-on, project-based approach to provide you with all the tools and techniques that web developers need to create, debug, and deploy efficient web applications using ASP.NET Core and Angular. The fifth edition has been updated to cover advanced topics such as Minimal APIs, Web APIs with GraphQL, real-time updates with SignalR, and new features in .NET 6 and Angular 13. You begin by building a data model with Entity Framework Core, alongside utilizing the Entity Core Fluent API and EntityTypeConfiguration class. You'll learn how to fetch and display data and handle user input with Angular reactive forms and front-end and back-end validators for maximum effect. Later, you will perform advanced debugging and explore the unit testing features provided by (.NET 6) and Jasmine, as well as Karma for Angular. After adding authentication and authorization to your apps, you will explore progressive web applications, learning about their technical requirements, testing processes, and how to convert a standard web application to a PWA. By the end of this web development book, you will understand how to tie together the front-end and back-end to build and deploy secure and robust web applications.
Table of Contents (18 chapters)
Other Books You May Enjoy

Client-initiated Events

However, we’ve only worked on a server-to-client broadcast: what if we want to send something from our client to the server? It’s true that we have a URL endpoint to test our update message, but could we send it from the hubConnection instead?

As a matter of fact, we can: and it’s actually quite simple to implement, since we already did most of the required groundwork.

More precisely, here’s what we need to do:

  • Update the HealthCheckHub at the server-side level, to give clients the chance to invoke an Update method
  • Update the HealthCheckComponent at the client-side level, to actually invoke the method
  • Test it to see if everything works as expected

Let’s do this.

Updating the HealthCheckHub

As we already know, the SignalR Hub allows a bi-directional data exchange, meaning that clients can send data through it: however, if we want to allow such behavior, we need to implement the...