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控制器本身是不带有参的构造函数的，如果我们为控制器仅仅提供有参的构造函数，就会报错。不过，可以利用DependencyResolver的SetResolver方法，让ASP.NET MVC支持有参的构造函数。
1：为系统准备两个类型，如下：
注意，这里要实现的是让控制器支持Unity注入。
UnityControllerFactory代码如下：
public class UnityControllerFactory : DefaultControllerFactory { IUnityContainer container; public UnityControllerFactory(IUnityContainer container) { this .container = container; } protected override IController GetControllerInstance(RequestContext reqContext, Type controllerType) { if (controllerType == null ) { return null ; } return container.Resolve(controllerType) as IController; } } |
UnityDependencyResolver代码如下：
public class UnityDependencyResolver : IDependencyResolver { IUnityContainer container; public UnityDependencyResolver(IUnityContainer container) { this .container = container; } public object GetService(Type serviceType) { if (! this .container.IsRegistered(serviceType)) { return null ; } return container.Resolve(serviceType); } public IEnumerable< object > GetServices(Type serviceType) { return container.ResolveAll(serviceType); } } |
2：在Application_Start中注册
代码如下：
using (IUnityContainer container = new UnityContainer()) { UnityConfigurationSection section = (UnityConfigurationSection)ConfigurationManager.GetSection( "unity" ); section.Configure(container, "containerOne" ); //tell mvc use UnityDependencyResolver to create controll instances; container.RegisterType<IControllerFactory, UnityControllerFactory>(); //_container.RegisterType<ISubjectRepository, SubjectRepository>(new TransientLifetimeManager()); DependencyResolver.SetResolver( new UnityDependencyResolver(container)); } |
3：Web.config配置如下
<configSections> <section name= "unity" type= "Microsoft.Practices.Unity.Configuration.UnityConfigurationSection,Microsoft.Practices.Unity.Configuration" /> </configSections> <unity xmlns= "" > <assembly name= "SampleProject" /> < namespace name= "SampleProject" /> <alias alias= "ISampleClass" type= "ISampleClass" /> <alias alias= "SampleClass" type= "SampleClass" /> <container name= "containerOne" > <register type= "ISampleClass" mapTo= "SampleClass" /> </container> </unity> |
至此，完成本文所述功能。
本文转自最课程陆敏技博客园博客，原文链接：http://www.cnblogs.com/luminji/archive/2011/12/22/2298262.html，如需转载请自行联系原作者