asp.net团结依赖注入不能很好地工作 [英] asp.net unity dependency injection doesn't work well

问题描述

我使用asp.net的MVC框架3，我创建了实现IControllerFactory接口的UnityControllerFactory：

I am using the mvc 3 framework of asp.net, I have created a UnityControllerFactory that implements the IControllerFactory interface:

...
public class UnityControllerFactory : IControllerFactory
{
    private IUnityContainer _container;
    private IControllerFactory _innerFactory;

    public UnityControllerFactory(IUnityContainer container)
        : this(container, new DefaultControllerFactory())
    {
    }

    protected UnityControllerFactory(IUnityContainer container,
                                     IControllerFactory innerFactory)
    {
        _container = container;
        _innerFactory = innerFactory;
    }
public IController CreateController(RequestContext requestContext,
                                        string controllerName)
    {
        try
        {
            IController controller = _container.Resolve<IController>(controllerName.ToLowerInvariant);

            return controller;
        }
        catch (Exception ex)
        {
            var msg = ex.Message;
            return _innerFactory.CreateController(requestContext, controllerName);
        }

    }
...

和在Application_Start（），我有：

and in the Application_Start(), I have:

protected void Application_Start() {
        AreaRegistration.RegisterAllAreas();
        RegisterGlobalFilters(GlobalFilters.Filters);
        RegisterRoutes(RouteTable.Routes);


        IUnityContainer container = GetUnityContainer();
        container.RegisterType<IRepository<User>, LiveRepository<User>>();
        DependencyResolver.SetResolver(new UnityDependencyResolver(container));
        ControllerBuilder.Current.SetControllerFactory(new UnityControllerFactory(container));
        ...

    }

我测试这与家庭控制器

I test this with a home controller

public class HomeController : Controller{
    IRepository<User> userRepo;
    public HomeController(IRepository<User> userRepo)
    {
         this.userRepo = userRepo;
    }
    ...
}

当我运行应用程序时，我就无法构建家用控制器都没有。
在该行：

When I run the app, I can not build the home controller at all. in the line:

IController controller = _container.Resolve<IController>(controllerName.ToLowerInvariant);

我得到一个异常说：

I get an exception says:

**的依赖解析失败，TYPE =System.Web.Mvc.IController，名字=
HomeController的。在解析

**"Resolution of the dependency failed, type = "System.Web.Mvc.IController", name = "homecontroller". Exception occurred while: while resolving.

目前的异常时，该容器是：解决System.Web.Mvc.IController，HomeController的**

At the time of the exception, the container was: Resolving System.Web.Mvc.IController,homecontroller"**

但即使使用该行默认的控制器工厂：

but even with the default controller factory using the line:

_innerFactory.CreateController(requestContext, controllerName);

我还不能建立控制器所有，请帮助

I still cannot build the controller at all, please help

推荐答案

我建议你采取看的以下博客帖子这说明了如何使用统一定制DependencyResolver在ASP.NET MVC 3应用程序。

I would recommend you taking a look at the following blog post which illustrates how to use a custom DependencyResolver with Unity in an ASP.NET MVC 3 application.

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