Ioc Autofac心得

对于这个容器注入，个人也不是很熟悉，很多还不懂，只会基本的操作，几天把它记录下来，说不定以后帮助就大了呢，这方面跟安卓差距还是挺大的

下面记录下应用的流程

步骤：

1.添加应用

2.重写工厂（这里讲的是常用的构造方法注入方式）

public class CreateAutofacFactory : DefaultControllerFactory
    {
        public override IController CreateController(RequestContext requestContext, string controllerName)
        {
            //获取容器
            IContainer ic = CreateControllers.CreateController().Icontainer;
            //获取控制器类型
            Type t = this.GetControllerType(requestContext, controllerName);
            //从容器中解析出对象
            return ic.Resolve(t) as IController;
        }
    }

public class CreateControllers
    {
        private CreateControllers() { }
        private static CreateControllers createController;
        public static CreateControllers CreateController()
        {
            if (createController == null)
                createController = new CreateControllers();
            return createController;
        }
        private IContainer iContainer { get; set; }
        public IContainer Icontainer
        {
            get 
            {
                if (iContainer == null)
                {
                    ContainerBuilder cb = new ContainerBuilder();
                    //用代码注册类型
                    //cb.RegisterType<StudentDao>().As<IStudentDao>();
                    //cb.RegisterType<StudentManager>().As<IStudentManager>();
                    //cb.RegisterType<HomeController>();

                    //从配置文件注册类型
                    cb.RegisterModule(new ConfigurationSettingsReader("autofac"));
                    iContainer = cb.Build();//创建容器
                }
                return iContainer;
            }
        }
    }

3.启动（更换）工厂

public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();

            WebApiConfig.Register(GlobalConfiguration.Configuration);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);

            //换ControllerFactory(服务器一启动就更换工厂)
            ControllerBuilder.Current.SetControllerFactory(new CreateAutofacFactory());
        }
    }

4.添加配置文件

<configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  
    <!--在配置文件中添加配置节点 name是配置节点的标签名 
        type是读取配置节点内容的类 格式：命名空间名.类名，程序集名-->
    <section name="autofac" type="Autofac.Configuration.SectionHandler, Autofac.Configuration"/>
  
  </configSections>

<autofac>
    <components>
        <component type="Winning.Tjgi.Backstage3G.UI.Controllers.HomeController,Winning.Tjgi.Backstage3G.UI"
               />
<component
             type="test.Dal.UserDao,test.Dal"
             service="test.IDal.IUserDao,test.IDal"/>
<component
              type="test.Bll.UserManager,test.Bll"
              service="test.IBll.IUserManager,test.IBll" />
</components>
  </autofac>

5.构造函数

        IUserManager uMan = null;
        public HomeController(IUserManager uMan)
        {
            this.uMan = uMan;
        }    

五步走起，如果过程出错的话基本上都是配置文件配置出错，还有就是经常忘记更新dll类库，在这里要建议下把类库的输出路径改成到UI项目里，经常动手才会记忆深刻，一直在努力中，希望能走出自己的道路，虽然脆弱，却不退缩。