使用Castle Windsor在ASP.NET MVC中设置控制反转(IoC)

Question

我正在讨论Sanderson的Pro ASP.NET MVC框架,在第4章他讨论了创建一个自定义控制器工厂,似乎现在不推荐使用原始方法,AddComponentLifeStyle或AddComponentWithLifeStyle用于注册控制器:

public class WindsorControllerFactory : DefaultControllerFactory
{
    IWindsorContainer container;

    public WindsorControllerFactory()
    {
        container = new WindsorContainer(new XmlInterpreter(new ConfigResource("castle")));

        // register all the controller types as transient
        var controllerTypes = from t in Assembly.GetExecutingAssembly().GetTypes()
                              where typeof(IController).IsAssignableFrom(t)
                              select t;

        //[Obsolete("Use Register(Component.For<I>().ImplementedBy<T>().Named(key).Lifestyle.Is(lifestyle)) instead.")]
        //IWindsorContainer AddComponentLifeStyle<I, T>(string key, LifestyleType lifestyle) where T : class;
        foreach (Type t in controllerTypes)
        {
            container.Register(Component.For<IController>().ImplementedBy<???>().Named(t.FullName).LifeStyle.Is(LifestyleType.Transient));
        }
    }

    // Constructs the controller instance needed to service each request
    protected override IController GetControllerInstance(Type controllerType)
    {
        return (IController)container.Resolve(controllerType);
    }
}

新的建议是使用Register(Component.For<I>().ImplementedBy<T>().Named(key).Lifestyle.Is(lifestyle)),但我无法弄清楚如何在ImplementedBy<???>()方法中呈现实现控制器类型.我试过ImplementedBy<t>()和ImplementedBy<typeof(t)>(),但我不能找到合适的方式,在实现类型通过.有任何想法吗？

Answer 1

我正在使用ControllerBuilder.SetControllerFactory您可以在开源项目MvcContrib中找到的代码执行此操作:

的Global.asax.cs

protected void Application_Start()
{
    ...

    IWindsorContainer windsorContainer = new WindsorContainer();
    windsorContainer.RegisterControllers(Assembly.GetExecutingAssembly());
    ControllerBuilder.Current.SetControllerFactory(new WindsorControllerFactory(windsorContainer));

    ...
}

WindsorControllerFactory

public class WindsorControllerFactory : DefaultControllerFactory
{
    private readonly IWindsorContainer _container;

    public WindsorControllerFactory(IWindsorContainer container)
    {
        if (container == null)
        {
            throw new ArgumentNullException();
        }

        _container = container;
    }

    protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
    {
        if (controllerType == null)
        {
            throw new HttpException();
        }

        if (!typeof(IController).IsAssignableFrom(controllerType))
        {
            throw new ArgumentException();
        }

        try
        {
            return (IController)_container.Resolve(controllerType);
        }
        catch (Exception ex)
        {
            throw new InvalidOperationException();
        }
    }

    public override void ReleaseController(IController controller)
    {
        IDisposable disposable = controller as IDisposable;

        if (disposable != null)
        {
            disposable.Dispose();
        }

        _container.Release(controller);
    }
}

WindsorExtensions(见MvcContrib)

public static class WindsorExtensions
{
    public static IWindsorContainer RegisterController<T>(this IWindsorContainer container) where T : IController
    {
        container.RegisterControllers(typeof(T));

        return container;
    }

    public static IWindsorContainer RegisterControllers(this IWindsorContainer container, params Type[] controllerTypes)
    {
        foreach (Type type in controllerTypes)
        {
            if (ControllerExtensions.IsController(type))
            {
                container.Register(Component.For(type).Named(type.FullName).LifeStyle.Is(LifestyleType.Transient));
            }
        }

        return container;
    }

    public static IWindsorContainer RegisterControllers(this IWindsorContainer container, params Assembly[] assemblies)
    {
        foreach (Assembly assembly in assemblies)
        {
            container.RegisterControllers(assembly.GetExportedTypes());
        }

        return container;
    }
}

ControllerExtensions(参见MvcContrib)

public static class ControllerExtensions
{
    public static bool IsController(Type type)
    {
        return type != null
               && type.Name.EndsWith("Controller", StringComparison.OrdinalIgnoreCase)
               && !type.IsAbstract
               && typeof(IController).IsAssignableFrom(type);
    }
}