Castle.Windsor 在MVC与WebApi中如何进行IOC

1.创建MVC项目，安装Castle Windsor

2.创建CastleWindsor文件夹

    在ASP.NET MVC中，每次请求，DefaultControllerFactory都会为我们创建controller实例，我们需要自定义一个派生自DefaultControllerFactory的类，让Castle Windsor帮我们生成controller实例。创建WindsorControllerFactory类，并集成子DeafaultControllerFactory

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1. namespace CastleApp.CastleWindsor  
2. {  
3.     public class WindsorControllerFactory : DefaultControllerFactory  
4.     {  
5.         private readonly IKernel _ikernel;  
6.         public WindsorControllerFactory(IKernel ikernel)  
7.         {  
8.             _ikernel = ikernel;  
9.         }  
10.         protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)  
11.         {  
12.             if (controllerType == null)  
13.             {  
14.                 throw new HttpException(404, string.Format("当前对{0}的请求不存在", requestContext.HttpContext.Request.Path));  
15.             }  
16.             return (IController)_ikernel.Resolve(controllerType);  
17.         }  
18.         public override void ReleaseController(IController controller)  
19.         {  
20.             _ikernel.ReleaseComponent(controller);  
21.             base.ReleaseController(controller);  
22.         }  
23.     }  
24. }  

3.在global.asax中：生成Castle Windsor实例，赋值给自定义ControllerFactory的构造函数，并在Application结束时销毁该Castle Windsor实例。

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1. public class MvcApplication : System.Web.HttpApplication  
2.     {  
3.         public static IWindsorContainer _container;  
4.         protected void Application_Start()  
5.         {  
6.             AreaRegistration.RegisterAllAreas();  
7.             RouteConfig.RegisterRoutes(RouteTable.Routes);  
8.   
9.             MvcApplication.BootstrapContainer();  
10.         }  
11.         private static void BootstrapContainer()  
12.         {  
13.             _container = new WindsorContainer();  
14.             _container.Install(FromAssembly.This());  
15.             ControllerBuilder.Current.SetControllerFactory(new WindsorControllerFactory(_container.Kernel));  
16.         }  
17.         protected void Application_End()  
18.         {  
19.             _container.Dispose();  
20.         }  
21.     }  

4.需要告诉Castle Windsor在何种条件下，以怎样的方式注册依赖。Castle Windsor提供了IWindsorInstaller接口。在CastleWindsor文件夹下创建实现该接口的类。

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1. namespace CastleApp.CastleWindsor  
2. {  
3.     public class ControllerInstaller : IWindsorInstaller  
4.     {  
5.         public void Install(IWindsorContainer container, IConfigurationStore store)  
6.         {  
7.             container.Register(Classes.FromThisAssembly() //在哪里找寻接口或类  
8.                 .BasedOn<IController>() //实现IController接口  
9.                 .Configure(c => c.LifestylePerWebRequest()));//每次请求创建一个Controller实例  
10.   
11.             container.Register(Component.For<IContactManager>().ImplementedBy<ContactManager>());  
12.         }  
13.     }  
14. }  

5.创建接口，创建controller

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1. public class AboutController : Controller  
2.     {  
3.         private IContactManager contactManager;  
4.         public AboutController(IContactManager contactManager)  
5.         {  
6.             this.contactManager = contactManager;  
7.         }  
8.         public ActionResult Index()  
9.         {  
10.               
11.             ViewBag.name= contactManager.ShowName("123");  
12.             return View();  
13.         }  
14.     }