Book Image

Mastering Ninject for Dependency Injection

By : Daniel Baharestani
Book Image

Mastering Ninject for Dependency Injection

By: Daniel Baharestani

Overview of this book

Dependency injection is an approach to creating loosely coupled applications. Maintainability, testability, and extensibility are just a few advantages of loose coupling. Ninject is a software library which automates almost everything that we need in order to implement a dependency injection pattern. Mastering Ninject for Dependency Injection will teach you everything you need to know in order to implement dependency injection using Ninject in a real-life project. Not only does it teach you about Ninject core framework features that are essential for implementing dependency injection, but it also explores the power of Ninject's most useful extensions and demonstrates how to apply them. Mastering Ninject for Dependency Injection starts by introducing you to dependency injection and what it's meant for with the help of sufficient examples. Eventually, you'll learn how to integrate Ninject into your practical project and how to use its basic features. Also, you will go through scenarios wherein advanced features of Ninject, such as Multi-binding, Contextual binding, providers, factories and so on, come into play. As you progress, Mastering Ninject for Dependency Injection will show you how to create a multilayer application that demonstrates the use of Ninject on different application types such as MVC, WPF, WCF, and so on. Finally, you will learn the benefits of using the powerful extensions of Ninject.
Table of Contents (12 chapters)

DI patterns and antipatterns

Dependencies can be injected in a consumer class using different patterns and injecting them into a constructor is just one of them. While there are some patterns that can be followed for injecting dependencies, there are also some patterns that are recommended to be avoided, as they usually lead to undesirable results. In this section, we will examine only those patterns and antipatterns that are somehow relevant to Ninject features. However, a comprehensive study of them can be found in Mark Seemann's book, Dependency Injection in .NET.

Constructor Injection

Constructor Injection is the most common and recommended pattern for injecting dependencies in a class. Generally this pattern should always be used as the primary injection pattern unless we have to use other ones. In this pattern, a list of all class dependencies should be introduced in the constructor.

The question is what if the class has more than one constructor. Although Ninject's strategy for selecting...