Unity DI与控制器中的MVC 5

Question

我在尝试在MVC控制器中进行依赖注入时遇到了问题.

目前的例外情况如下:

当前类型myproject.Core.ToolbarLogic是一个接口,无法构造.你错过了类型映射吗？

调试我意识到这个异常是从这句话中提出的(包含在Razor视图中):

@{ Html.RenderAction("Toolbar", "Toolbar");  }

在UnityConfig文件中,所有类型都是方便注册的,我在控制器中有一个空的构造函数,异常是从我无法访问调试的地方引发的......此外,我在StackOverflow和Google中阅读了很多答案,我不知道我知道现在要尝试什么(我几乎尝试过所有事情).

任何人都知道DI有什么问题？

码:

ToolbarController.cs

public class ToolbarController : BaseController
{

    [Dependency]
    public IToolbarLogic ToolbarLogic { get; set; }

    public ToolbarController()
    {
    }


    // GET: Common/Toolbar
    public ActionResult Toolbar()
    {
        bool ShowConfidential = ToolbarLogic.ShowConfidential();
        string linkHome = ToolbarLogic.BindHome(base.User.Identity.Name);
        return PartialView(new ToolbarModel() {
            ShowConfidential = ShowConfidential,
            lnkHome = linkHome
        });
        return PartialView();
    }

}

UnityWebActivator.cs

/// <summary>Provides the bootstrapping for integrating Unity with ASP.NET MVC.</summary>
public static class UnityWebActivator
{
    /// <summary>Integrates Unity when the application starts.</summary>
    public static void Start() 
    {
        var container = UnityConfig.GetConfiguredContainer();

        FilterProviders.Providers.Remove(FilterProviders.Providers.OfType<FilterAttributeFilterProvider>().First());
        FilterProviders.Providers.Add(new UnityFilterAttributeFilterProvider(container));

        DependencyResolver.SetResolver(new UnityDependencyResolver(container));

        // TODO: Uncomment if you want to use PerRequestLifetimeManager
        // Microsoft.Web.Infrastructure.DynamicModuleHelper.DynamicModuleUtility.RegisterModule(typeof(UnityPerRequestHttpModule));
    }

    /// <summary>Disposes the Unity container when the application is shut down.</summary>
    public static void Shutdown()
    {
        var container = UnityConfig.GetConfiguredContainer();
        container.Dispose();
    }
}

UnityConfig.cs

    /// <summary>
/// Specifies the Unity configuration for the main container.
/// </summary>
public class UnityConfig
{
    #region Unity Container
    private static Lazy<IUnityContainer> container = new Lazy<IUnityContainer>(() =>
    {
        var container = new UnityContainer();
        RegisterTypes(container);
        return container;
    });

    /// <summary>
    /// Gets the configured Unity container.
    /// </summary>
    public static IUnityContainer GetConfiguredContainer()
    {
        return container.Value;
    }
    #endregion

    /// <summary>Registers the type mappings with the Unity container.</summary>
    /// <param name="container">The unity container to configure.</param>
    /// <remarks>There is no need to register concrete types such as controllers or API controllers (unless you want to 
    /// change the defaults), as Unity allows resolving a concrete type even if it was not previously registered.</remarks>
    public static void RegisterTypes(IUnityContainer container)
    {
        container.RegisterType<IToolbarLogic, ToolbarLogic>();

        // There is an Unity.config file
        container.LoadConfiguration();
    }
}

Unity.config

<?xml version="1.0"?>
<!-- Configuración de Unity -->
<unity xmlns="http://schemas.microsoft.com/practices/2010/unity">
  <container>


  </container>
</unity>

编辑1:

我已经对LoadConfiguration@Nkosi所说的行进行了评论,因为我的Unity.config中没有任何相关信息,因为它是有道理的(见上文,它是空的).

错误stils相同:

Resolution of the dependency failed, type = "MVCControls.Controllers.ToolbarController", name = "(none)".
Exception occurred while: while resolving.

Exception is: InvalidOperationException - The current type, interfaces_logic.Interfaces.IToolbarLogic, is an interface and cannot be constructed. Are you missing a type mapping?
-----------------------------------------------
At the time of the exception, the container was:

  Resolving MVCControls.Controllers.ToolbarController,(none)
  Resolving value for property ToolbarController.ToolbarLogic
  Resolving interfaces_logic.Interfaces.IToolbarLogic,(none)

Answer 1

尝试用以下内容替换控制器的构造函数：

public ToolbarController(IToolbarLogic toolbarLogic)
{
    this.ToolbarLogic = toolbarLogic;
}