Book Image

Modern Web Development with ASP.NET Core 3 - Second Edition

By : Ricardo Peres
Book Image

Modern Web Development with ASP.NET Core 3 - Second Edition

By: Ricardo Peres

Overview of this book

ASP.NET has been the preferred choice of web developers for a long time. With ASP.NET Core 3, Microsoft has made internal changes to the framework along with introducing new additions that will change the way you approach web development. This second edition has been thoroughly updated to help you make the most of the latest features in the framework, right from gRPC and conventions to Blazor, which has a new chapter dedicated to it. You’ll begin with an overview of the essential topics, exploring the Model-View-Controller (MVC) pattern, various platforms, dependencies, and frameworks. Next, you’ll learn how to set up and configure the MVC environment, before delving into advanced routing options. As you advance, you’ll get to grips with controllers and actions to process requests, and later understand how to create HTML inputs for models. Moving on, you'll discover the essential aspects of syntax and processes when working with Razor. You'll also get up to speed with client-side development and explore the testing, logging, scalability, and security aspects of ASP.NET Core. Finally, you'll learn how to deploy ASP.NET Core to several environments, such as Azure, Amazon Web Services (AWS), and Docker. By the end of the book, you’ll be well versed in development in ASP.NET Core and will have a deep understanding of how to interact with the framework and work cross-platform.
Table of Contents (26 chapters)
Section 1: The Fundamentals of ASP.NET Core 3
Section 2: Improving Productivity
Section 3: Advanced Topics
Appendix A: The dotnet Tool

Dependency injection

ASP.NET Core instantiates the controllers through its built-in DI framework. Since it fully supports constructor injection, you can have any registered services injected as parameters to your constructor:

services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

public HomeController(IHttpContextAccessor accessor) { ... }

However, you can also request a service from the DI in a service locator way by leveraging the HttpContext.RequestServices property as follows:

var accessor = this.HttpContext.RequestServices.GetService<IHttpContextAccessor>();
For the strongly typed GetService<T> extension method, you need to add a reference to the Microsoft.Extensions.DependencyInjection namespace.

In action methods, you can also inject a service by decorating its typed parameter with the [FromServices] attribute, as follows:

public IActionResult Index([FromServices...