MVC 中的 IoC Castle Windsor 路由问题

Question

我已经在我的 mvc 应用程序中设置了温莎城堡。一切都很好，除了它还捕获链接或图像类型的路由。问题是，在退出控制器并生成视图之前，“GetControllerInstance”是以“null”类型执行的。只要页面上存在以下链接，就会发生这种情况：

<link rel="stylesheet" type="text/css" href="non-existing.css"/>

或者指向不存在的图像的链接。为什么会发生这种情况？

我的窗户课程：

    public class WindsorControllerFactory : DefaultControllerFactory
{
    #region Constants and Fields

    /// <summary>
    /// The container.
    /// </summary>
    private readonly WindsorContainer container;

    #endregion

    // The constructor:
    // 1. Sets up a new IoC container
    // 2. Registers all components specified in web.config
    // 3. Registers all controller types as components
    #region Constructors and Destructors

    /// <summary>
    /// Initializes a new instance of the <see cref="WindsorControllerFactory"/> class.
    /// </summary>
    public WindsorControllerFactory()
    {
        // Instantiate a container, taking configuration from web.config
        this.container = InversionOfControl.Container;

        // Also register all the controller types as transient
        IEnumerable<Type> controllerTypes = from t in Assembly.GetExecutingAssembly().GetTypes()
                                            where typeof(IController).IsAssignableFrom(t)
                                            select t;
        foreach (Type t in controllerTypes)
        {
            this.container.AddComponentLifeStyle(t.FullName, t, LifestyleType.Transient);
        }
    }

    #endregion

    #region Methods

    /// <summary>
    /// The get controller instance.
    /// </summary>
    /// <param name="requestContext">
    /// The request context.
    /// </param>
    /// <param name="controllerType">
    /// The controller type.
    /// </param>
    /// <returns>
    /// Resolved controller instance.
    /// </returns>
    protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
    {
        if (controllerType == null)
        {
            controllerType = typeof(HomeController);
        }

        return (IController)this.container.Resolve(controllerType);
    }

    #endregion
}

Answer 1

这是很自然的。不存在的图像或CSS无法找到控制器，但您将其默认为HomeController，而该控制器无法处理静态内容。

我认为你不需要在这里重写。让默认控制器处理它所做的事情，如果找不到资源，则会收到 404 错误，而不是强制它由该控制器提供服务。

---

正如我所说，如果找不到该类型，那么该类型很自然地为 null。
改成这样：

   if (controllerType == null)
    {
        return base.GetControllerInstance(requestContext, controllerType);

    }

Answer 2

我发现当controllerType为null时我必须返回null。将其交给基类会导致异常。下面是我正在使用的工作代码。

public class DependencyControllerFactory : DefaultControllerFactory, IDisposable
{
    protected readonly WindsorContainer _container;

    public DependencyControllerFactory()
    {
        _container = new WindsorContainer();

        _container.Kernel.Resolver.AddSubResolver(new CollectionResolver(_container.Kernel));
        _container.Install(FromAssembly.This());
    }

    protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
    {
        if (controllerType == null)
        {
            return null;
        }
        else
        {
            return (IController)_container.Resolve(controllerType);
        }
    }

    public override void ReleaseController(IController controller)
    {
        _container.Release(controller);
    }

    public void Dispose()
    {
        _container.Dispose();
    }
}