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NInject - DI Container
This document provides an overview of using the NInject dependency injection container in an ASP.NET MVC application. It demonstrates creating classes and interfaces, binding interfaces to concrete classes in NInject, and resolving dependencies through the container. The container handles instantiating classes and injecting their dependencies without the client code directly instantiating objects. This allows for loose coupling and makes code easier to test. The document includes examples of setting up NInject, configuring bindings, resolving dependencies, and examining what happens behind the scenes.
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NInject - DI Container
- 1. NInject DI Container Bhushan Mulmule| bhushan.mulmule@gmail.com | http://dotnetvideotutorial.com
- 2. If you arenew to DI Click here to view Dependency Injection for Beginners And then come back! If link will not work you can copy and paste following url: http://www.slideshare.net/bhushanmulmule/dependency-injection-for-beginners-31272832
- 3. Let us createsample ASP.NET MVC application to see DI in action We will be using ASP.NET MVC Application To Demonstrate NInject Follow the Walkthrough to create one
- 4. Create New ASP.NETMVC Project: DIContainerDemo
- 5. Select Empty Templateand Razor View Engine
- 6. Add Three Classesand One Interface
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- 11. Add New Controller:HomeController
- 12. To create Objectof Booking class in HomeController Inject object of EmailNotification to constructor of Booking
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- 14. Right Click onIndex Method of HomeController Add View
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- 17. And the Outputwill be…
- 18. To create Objectof Booking class we can also Inject object of SMSNotification to constructor of Booking
- 19. Modified HomeController touse SMSNotification
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- 28. DI container isabout removing need of this object instantiation from client code.
- 29. Few of theDI Containers are Unity, Ninject, Autofac, StructureMap, Spring.NET
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- 31. Installing NInject Or youcan also download dll and add the reference
- 32. Steps to Setit up
- 33. Creating NInject kernelobject IKernel kernel = new StandardKernel(); Binding interface with concrete class kernel.Bind<INotification>().To<EmailNotification>(); Getting object of bounded concrete class INotification notification = kernel.Get<INotification>();
- 34. Modified HomeController touse NInject
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- 37. Note: It willact as centralized location for all Ninject configuration.
- 38. Create Folder DIResolver Add class NInjectDependencyResover.cs
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- 41. Register our DependencyResolver in Gloabal.aspx
- 42. Modify HomeController touse DependencyResolver
- 43. Time to enjoyfruits of labor
- 46. Lets try tounderstand What's happening behind the scene
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- 52. Note that GetService()receives type parameter in this case it will be HomeController.
- 53. Client Request for index methodof HomeController type HomeController MVC Ninject Dependecy Resolver
- 55. Client Request for index methodof HomeController type HomeController MVC Ninject Dependecy Resolver type HomeController Ninject
- 57. Client Request for index methodof HomeController type HomeController MVC Ninject Dependecy Resolver type HomeController Ninject Inspects constructor of HomeController for dependencies
- 58. Note: Here Ninjectwill create object of EmailNotification as we have bounded it to INotification in AddBinding() method. Same way it can be bounded to SMSNotification.
- 62. Client Request for index methodof HomeController type HomeController MVC Object HomeController with Object EmailNotification Ninject Dependecy Resolver type HomeController Ninject Object HomeController With Object EmailNotification Inspects constructor of HomeController for dependencies
- 63. “Test Driven Developmentusing Unit Testing”.
- 64. Find it out kernel.Bind<INotification>().To<SMSNotification>() .WithConstructorArgument("Param","value"); kernel.Bind<INotification>().To<SMSNotification>() .WithPropertyValue("PropertyName", "Value"); kernel.Bind<INotification>().To<SMSNotification>() .When(//"lamda expression returning bool"); kernel.Bind<INotification>().To<SMSNotification>() .WhenClassHas</*attribute type*/>();
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- 69. Thank You Bhushan Mulmule| bhushan.mulmule@gmail.com | http://dotnetvideotutorial.com