Book Image

ASP.NET Core 5 and Angular - Fourth Edition

By : Valerio De Sanctis
Book Image

ASP.NET Core 5 and Angular - Fourth Edition

By: Valerio De Sanctis

Overview of this book

Learning full-stack development calls for knowledge of both front-end and back-end web development. ASP.NET Core 5 and Angular, Fourth Edition will enhance your ability to create, debug, and deploy efficient web applications using ASP.NET Core and Angular. This revised edition includes coverage of the Angular routing module, expanded discussion on the Angular CLI, and detailed instructions for deploying apps on Azure, as well as both Windows and Linux. Taking care to explain and challenge design choices made throughout the text, Valerio teaches you how to build 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 xUnit.net (.NET 5) and Jasmine, as well as Karma for Angular. After adding authentication and authorization to your apps, you will explore progressive web applications (PWAs), learning about their technical requirements, testing, and converting SWAs to PWAs. By the end of this 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 (15 chapters)
13
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14
Index

Data services

The two web applications that we have created so far – HealthCheck in Chapters 1 to 3, and WorldCities in Chapters 4 to 7 – both feature front-end to back-end communication over the HTTP(S) protocol, and in order to establish such communication, we made good use of the HttpClient class, a built-in Angular HTTP API client shipped with the @angular/common/http package that rests on the XMLHttpRequest interface.

Angular's HttpClient class has a lot of benefits, including testability features, request and response typed objects, request and response interception, Observable APIs, and streamlined error handling. It can even be used without a data server thanks to the in-memory web API package, which emulates CRUD operations over a RESTful API: we briefly talked about that at the beginning of Chapter 4, Data Model with Entity Framework Core, when we were asking ourselves if we really needed a data server or not (the answer was no, therefore we didn&apos...