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> <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