MVC5.0(三)

MVC+IOC+ORM

备注：IOC、AOP、ORM此处只是带过

概念：

MVC请求进来---路由匹配---找到控制器和Action---控制器是个普通的类，Action是个普通的实例方法，系统通过如下方式完成控制器的实例创建：

 路由匹配后得到控制器名称---MVCHandler---ControllerBuilder.GetControllerFactory()---然后创建的控制器的实例。

DefaultControllerFactory默认的控制器工厂，通过修改工厂来实现用容器(IOC)创建控制器实例

步骤：

 1 继承DefaultControllerFactory

 2 SetFactory----实例化控制器会进到这里

 3 引入第三方容器--将控制器的实例化换成容器操作

在Global.asax里 ControllerBuilder.Current.SetControllerFactory(new 第三方容器名称());

代码示例：

    public class ThirdController : Controller
    {
        private IUserService _iUserService = null;
        private ICompanyService _iCompanyService = null;
        private IUserCompanyService _iUserCompanyService = null;
        /// <summary>
        /// 构造函数注入---控制器得是由容器来实例化
        /// </summary>
        /// <param name="userService"></param>
        /// <param name="companyService"></param>
        /// <param name="userCompanyService"></param>
        public ThirdController(IUserService userService, ICompanyService companyService, IUserCompanyService userCompanyService)
        {
            this._iUserService = userService;
            this._iCompanyService = companyService;
            this._iUserCompanyService = userCompanyService;

        }
        // GET: Third
        public ActionResult Index()
        {
            IUserService service = this._iUserService;
            User user = service.Find<User>(2);
            return View();
        }
    }

  public class ElevenControllerFactory : DefaultControllerFactory
    {
        private Logger logger = new Logger(typeof(ElevenControllerFactory));

        protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
        {
            this.logger.Warn($"{controllerType.Name}被构造...");

            IUnityContainer container = DIFactory.GetContainer();
            //return base.GetControllerInstance(requestContext, controllerType);
            return (IController)container.Resolve(controllerType);
        }
    }

    public class MvcApplication : System.Web.HttpApplication
    {
        private Logger logger = new Logger(typeof(MvcApplication));
        protected void Application_Start()
        {

            AreaRegistration.RegisterAllAreas();//注册区域
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);//注册全局的Filter
            RouteConfig.RegisterRoutes(RouteTable.Routes);//注册路由
            BundleConfig.RegisterBundles(BundleTable.Bundles);//合并压缩 ，打包工具 Combres

            ControllerBuilder.Current.SetControllerFactory(new ElevenControllerFactory());

            this.logger.Info("网站启动了。。。");
        }


    }