Book Image

Learning Angular for .NET Developers

By : Rajesh Gunasundaram
Book Image

Learning Angular for .NET Developers

By: Rajesh Gunasundaram

Overview of this book

Are you are looking for a better, more efficient, and more powerful way of building front-end web applications? Well, look no further, you have come to the right place! This book comprehensively integrates Angular version 4 into your tool belt, then runs you through all the new options you now have on hand for your web apps without bogging you down. The frameworks, tools, and libraries mentioned here will make your work productive and minimize the friction usually associated with building server-side web applications. Starting off with building blocks of Angular version 4, we gradually move into integrating TypeScript and ES6. You will get confident in building single page applications and using Angular for prototyping components. You will then move on to building web services and full-stack web application using ASP.NET WebAPI. Finally, you will learn the development process focused on rapid delivery and testability for all application layers.
Table of Contents (16 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback

Dependency injection

Dependency injection is a design pattern that handles dependencies and resolves them. An instance of the dependencies will be passed to the dependent in order to use it. If a client module or class is dependent on a service, it needs to create an instance of the service before using it. We can inject or pass the instance of the service to the client using a dependency injection pattern, rather than a client module building the service.

Applying dependency injection enables us to create a client that does not have any knowledge of the service to be built and of the actual service it is consuming. The client will only have knowledge about the interface of the service as it needs to know how to use the service.

Why dependency injection?

Consider that we are creating a Mobile class, and it has dependency on a camera and internet connectivity.

The code snippet of a Mobile class

In the preceding code snippet, you can see that the instances of Camera and Internet are created in...