MVC 使用MEF依赖注入的蛋疼问题

2014-03-03 11:12:30 756 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

STM32版CCD线性摄像头寻线寻迹小车_stm32接ccd 目前大多数的小车寻线寻迹都是用红外对管寻线，这是比较简单也比较成熟的技术方案，且成本也低。本文将介绍使用CCD线性摄像头寻线寻迹。TSL1401 线性传感器由一个 1x128 的光电二极管阵列、相关的电荷放大电路以及一个内部像素数据保功能组成。内部像素数据保功能可以为所有像素点提供同时积分的开始和停止时间。该阵列由 128 个像素组成，每个像素的感光面积为 3,524.3 平方微米。像素之间的间隔为 8μm。内部控制逻辑简化了操作，该模块需要串行输入（SI）信号和时钟信号（CLK）。阅读详情

最近在用MEF做IOC，遇到两个问题，网上搜不出资料，难道是这个组件都没有人用了？!

1. MVC 自定义Filter，不能注入。
2. 定义了一个父Controller，不能注入。其他controller继承于它。

有解决方案的帮帮忙，谢谢



    [Export]

	[PartCreationPolicy(CreationPolicy.NonShared)]

    public class AdminAuthorizeAttribute : System.Web.Mvc.AuthorizeAttribute



public static class MefConfig

    {

        public static void RegisterMef()

        {

            var container = ConfigureContainer();



            ControllerBuilder.Current.SetControllerFactory(new MefControllerFactory(container));

            

            var dependencyResolver = System.Web.Http.GlobalConfiguration.Configuration.DependencyResolver;

            System.Web.Http.GlobalConfiguration.Configuration.DependencyResolver = new MefDependencyResolver(container);

        }



        private static CompositionContainer ConfigureContainer()

        {

            var catalog = new AggregateCatalog(new DirectoryCatalog(AppDomain.CurrentDomain.SetupInformation.PrivateBinPath));

            var container = new CompositionContainer(catalog);

			

            HttpContext.Current.DisposeOnPipelineCompleted(container);

            return container;

        }

    }



    public class MefDependencyResolver : IDependencyResolver

    {

        private readonly CompositionContainer _container;

        

        public MefDependencyResolver(CompositionContainer container)

        {

            _container = container;

        }



        public IDependencyScope BeginScope()

        {

            return this;

        }



        public object GetService(Type serviceType)

        {

            var export = _container.GetExports(serviceType, null, null).SingleOrDefault();



            return null != export ? export.Value : null;

        }



        public IEnumerable<object> GetServices(Type serviceType)

        {

            var exports =_container.GetExports(serviceType, null, null);

            var createdObjects = new List<object>();

            if (exports.Any())

            {

                foreach (var export in exports)

                {

                    createdObjects.Add(export.Value);

                }

            }



            return createdObjects;

        }



        public void Dispose()

        {



        }

    }



    public class MefControllerFactory : DefaultControllerFactory

    {

        private readonly CompositionContainer _compositionContainer;



        public MefControllerFactory(CompositionContainer compositionContainer)

        {

            _compositionContainer = compositionContainer;

        }



        protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType)

        {

            var export = _compositionContainer.GetExports(controllerType, null, null).SingleOrDefault();



            IController result;



            if (null != export)

            {

                result = export.Value as IController;

            }

            else

            {

                result = base.GetControllerInstance(requestContext, controllerType);

                _compositionContainer.ComposeParts(result);

            }

          

            return result;

        }

    }