NInject - DI Container
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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.
NInject - DI Container
- 1. NInject DI Container Bhushan Mulmule | bhushan.mulmule@gmail.com | http://dotnetvideotutorial.com
- 2. If you are new 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 create sample 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.NET MVC Project: DIContainerDemo
- 5. Select Empty Template and Razor View Engine
- 6. Add Three Classes and One Interface
- 10. Booking
- 11. Add New Controller: HomeController
- 12. To create Object of Booking class in HomeController Inject object of EmailNotification to constructor of Booking
- 13. HomeController
- 14. Right Click on Index Method of HomeController Add View
- 16. Final Structure
- 17. And the Output will be…
- 18. To create Object of Booking class we can also Inject object of SMSNotification to constructor of Booking
- 19. Modified HomeController to use SMSNotification
- 20. Output will be…
- 23. Problems…
- 27. DI Container
- 28. DI container is about removing need of this object instantiation from client code.
- 29. Few of the DI Containers are Unity, Ninject, Autofac, StructureMap, Spring.NET
- 30. NInject
- 31. Installing NInject Or you can also download dll and add the reference
- 32. Steps to Set it up
- 33. Creating NInject kernel object 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 to use NInject
- 37. Note: It will act as centralized location for all Ninject configuration.
- 38. Create Folder DIResolver Add class NInjectDependencyResover.cs
- 41. Register our Dependency Resolver in Gloabal.aspx
- 42. Modify HomeController to use DependencyResolver
- 43. Time to enjoy fruits of labor
- 46. Lets try to understand What's happening behind the scene
- 50. Steps break up…
- 52. Note that GetService() receives type parameter in this case it will be HomeController.
- 53. Client Request for index method of HomeController type HomeController MVC Ninject Dependecy Resolver
- 55. Client Request for index method of HomeController type HomeController MVC Ninject Dependecy Resolver type HomeController Ninject
- 57. Client Request for index method of HomeController type HomeController MVC Ninject Dependecy Resolver type HomeController Ninject Inspects constructor of HomeController for dependencies
- 58. Note: Here Ninject will 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 method of 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 Development using 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*/>();
- 69. Thank You Bhushan Mulmule | bhushan.mulmule@gmail.com | http://dotnetvideotutorial.com