2、MVC+IOC容器+ORM结合

1、常规写法，难道我们每次都new一个服务，如下面的UserService和CompanyService然后调用服务的Find方法去操作，为什么我们不让UserService和CompanyService服务注入进来呢？

public ActionResult Index()

{

　　DbContext context = new DbContext();

　　IUserService userService = new UserService(context);

　　User user = userService.Find<User>(); 
   return View(user); 
}

public ActionResult Index2()

{

　　DbContext context = new DbContext();

　　ICompanyService companyService = new CompanyService(context); 　　
   Company company = companyService.Find<Company>(2);

   return View(company); 
}

2、我们想要的实际效果是MVC请求进来的时候，实例化控制器的时候，就把UserService和CompanyService服务注入进来，但是下面的带参数的控制器构造函数TestController(IUserService userService, ICompanyService companyService)MVC是实例化不了的，MVC只能实例化不带参数的构造函数TestController()

 public class TestController : Controller

 {

        private IUserService _iUserService = null;

        private ICompanyService _iCompanyService = 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>

        public TestController(IUserService userService, ICompanyService companyService)

        {

            this._iUserService = userService;

            this._iCompanyService = companyService;

        }

}

public ActionResult Index()

{

　　DbContext context = new DbContext();

　　IUserService userService = this._iUserService;

　　User user = userService.Find<User>();

   return View(user);

}

public ActionResult Index2()

{

　　DbContext context = new DbContext();

　　ICompanyService companyService = this._iCompanyService;
   Company company = companyService.Find<Company>();

   return View(company); 
}

3、在“1、看源码MVC如何实例化控制器”中提到MVC实例化控制器使用的是ControllerBuilder.GetControllerFactory()得到一个DefaultControllerFactory工厂，然后用工厂的CreateController方法利用反射去创建Controller实例，那么我们可以把工厂换成自己实现的自定义工厂不就可以了吗，ControllerBuilder还有个SetControllerFactory方法，自定义的控制器工厂CustomControllerFactory继承DefaultControllerFactory，微软的特点是virtual和abstract都是让我们来扩展的，那么我们复写GetControllerInstance方法，在GetControllerInstance方法里去构建容器

public class CustomControllerFactory : DefaultControllerFactory

{

  　　protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)

     {

            IUnityContainer container = DIFactory.GetContainer();

            //return base.GetControllerInstance(requestContext, controllerType);

            return (IController)container.Resolve(controllerType);

     }

}

4、在Application_Start中指定自定义的控制器工厂

public class MvcApplication : System.Web.HttpApplication

{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 CustomControllerFactory());//设置自定义的控制器工厂

        }

}

5、依赖注入

public class DIFactory

{

        public static IUnityContainer GetContainer()

        {

            IUnityContainer container = null;

            //container.RegisterType

            ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();

            fileMap.ExeConfigFilename = Path.Combine(AppDomain.CurrentDomain.BaseDirectory + "CfgFiles\\Unity.Config");

            Configuration configuration = ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);

            UnityConfigurationSection section = (UnityConfigurationSection)configuration.GetSection(UnityConfigurationSection.SectionName);

            container = new UnityContainer();

            section.Configure(container, "MyContainer");

            return container;

        }

}

6、进行Unity配置

<configuration>

  <configSections>

    <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Unity.Configuration"/>

  </configSections>

  <unity>

    <sectionExtension type="Microsoft.Practices.Unity.InterceptionExtension.Configuration.InterceptionConfigurationExtension, Unity.Interception.Configuration"/>

    <containers>

      <container name="MyContainer">

        <extension type="Interception"/>

        <register type="System.Data.Entity.DbContext, EntityFramework" mapTo="SchoolManager.EF.Model.SchoolDBEntities, SchoolManager.EF.Model"/>

        <register type="SchoolManager.Bussiness.Interface.ICompanyService,SchoolManager.Bussiness.Interface" mapTo="SchoolManager.Bussiness.Service.CompanyService, SchoolManager.Bussiness.Service"/>

        <register type="SchoolManager.Bussiness.Interface.IUserService,SchoolManager.Bussiness.Interface" mapTo="SchoolManager.Bussiness.Service.UserService, SchoolManager.Bussiness.Service"/>

      </container>

    </containers>

  </unity>

</configuration>

巴特西

2、MVC+IOC容器+ORM结合

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