You need to be a premium member to use this feature. To access it, you'll have to upgrade your membership.
Become a sharper developer and jumpstart your career.
$0
$
. 00
monthly
For Basic members:
$10
For Premium members:
In this article you will learn about dependency with example using NInject Container.
Dependency Injection If you want to describe these two words, you can simply say they “Inject the Dependency”. So what’s the dependency? If we talk about the object oriented world, class is dependent on any other class. In MVC, it is more clear as the model fetches the data from DAL layer and presents that data to the view. So we can say that model is dependent on the DAL. So here Dependency should be simply like constructor of class A. Public A (B b) // Constructor of A Dependency injection allows us to loosely couple classes in layered architecture, so implementing the DI the code is more and more maintainable. So here we try to understand DI in the MVC way. The very basic flow of MVC request is like this, So here is where the problem begins. Let's there is a controller and it consumes the Service from a class. In this way we can’t change the controller to consume different services easily and we need to provide “Mock” for unit testing, We always know that decoupling the two layers is always an interface. So here also Interface plays a vital part. So we are aware of our controller to IServices Interface rather than Services class. So implementing in this way you can change the implementation of services class at any point of time. There are basically 3 ways of Implementing Dependency Injection,
Here we will mainly talk about a more common way of dependency Injection – Constructor Injection,
Here I will show with an example. Create a sample mvc project here. Create 2 classes and both classes implement an interface.
FileInfo in C#