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。