.NET MVC5+AUTOFAC实战

绝地灬酷狼 2022-10-06 05:46 150阅读 0赞

这几天研究IOC容器、DI：  
解耦，不用一个个实例化（理解到这了）面向接口编程思想  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTI4Njc0NA_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][20210611151836769.png]

于是昨天实验了一把MVC中如何使用IOC、构造函数注入  
话不多说上代码：  
小框架一拉  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTI4Njc0NA_size_16_color_FFFFFF_t_70 1]  
展开细说

Model:  
![在这里插入图片描述][20210611145605901.png]  
（懒的改名）

public class Class1
        { 
            public int Id {  get; set; }
            public string Name {  get; set; }
            public string Grade {  get; set; }
        }

仓储Resitory:  
![在这里插入图片描述][20210611145701137.png]  
定义一个接口

public  interface IStudentResitory
        { 
            string GetName(int id);
        }

实现一个接口：

public   class StudentResitory:IStudentResitory
        { 
            public string GetName(int id)
            { 
                switch (id)
                { 
                    case 3:
                        return "yhf";
                    case 4:
                        return "zjj";
                    case 5:
                        return "jwz";
                    default:
                        return "ddd";
                }
            }
        }

Service：  
![在这里插入图片描述][20210611145914757.png]  
定义一个接口  
![在这里插入图片描述][20210611145927785.png]

用构造函数注入IStudentResitory

public  class Service :IService
        { 
            private readonly IStudentResitory _studentRepository;
    
            public Service(IStudentResitory studentResitory)
            { 
                this._studentRepository = studentResitory;
            }
            public  string GetName(int id)
            { 
                return this._studentRepository.GetName(id);
            }
        }

Ioc：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTI4Njc0NA_size_16_color_FFFFFF_t_70 2]  
安装包Autofac

public static  class MvcContainer
        { 
            public static IContainer Instance;
            public static System.Web.Mvc.IDependencyResolver Init(Func<ContainerBuilder, ContainerBuilder> func = null)
            { 
                var builder = new ContainerBuilder();//新建容器用于注册组件
                MyBuild(builder);//注册组件
                func?.Invoke(builder);
                Instance = builder.Build();//利用构建器创建容器
                return new AutofacDependencyResolver(Instance);//返回针对MVC的解析器 
            }
            public static void MyBuild(ContainerBuilder builder)
            { 
                //注册仓储层
                Assembly repositoryAssembly = Assembly.Load("Repository");
                builder.RegisterAssemblyTypes(repositoryAssembly)
                    .PublicOnly()   //只要public访问权限的
                    .Where(cc => cc.IsClass)    //只要class类型的(排除值和interface类型)
                    .AsImplementedInterfaces(); //自动以其实现的接口暴露(包括Dispose接口)
    
                //注册逻辑层
                Assembly serviceAssembly = Assembly.Load("Service");
                builder.RegisterAssemblyTypes(serviceAssembly)
                    .PublicOnly()
                    .Where(cc => cc.IsClass)
                    .AsImplementedInterfaces();
    
                Assembly MvcAssembly = Assembly.Load("CESHI");
                builder.RegisterControllers(MvcAssembly);//注册MVC项目中的Controller
    
            } 
        }

回到MVC项目中 Global.asax文件在编译的时候执行我们注册组件的方法

protected void Application_Start()
            { 
                AreaRegistration.RegisterAllAreas();
                FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
                RouteConfig.RegisterRoutes(RouteTable.Routes);
                BundleConfig.RegisterBundles(BundleTable.Bundles);
                try
                { 
                    System.Web.Mvc.IDependencyResolver autofacResolver = MvcContainer.Init();
                    DependencyResolver.SetResolver(autofacResolver);
                }
                catch (Exception ee)
                { 
    
                    throw new Exception(ee.ToString());
                }
            }

最后在我们HomeController中通过构造函数的方法依赖注入  
注意也要安装AUTOFAC

private readonly IService _service; 
            public HomeController(IService service)
            { 
                this._service = service;
            }
            [HttpGet]
            public string GetNameById(int id)
            { 
                return _service.GetName(id);
            }

注意配置config：

最终效果

![在这里插入图片描述][2021061115160656.png]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTI4Njc0NA_size_16_color_FFFFFF_t_70]: /images/20221005/fef650e58c714d709b4405f5500732fe.png
[20210611151836769.png]: /images/20221005/7720eca4b6924f7a9b5b248b535ed5d9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTI4Njc0NA_size_16_color_FFFFFF_t_70 1]: /images/20221005/89ef1954b6aa4b6f80f9c9b7cae49d39.png
[20210611145605901.png]: /images/20221005/e08e26c3a9ad40d18781a55969efb6ac.png
[20210611145701137.png]: /images/20221005/999b621d921a47308840fbad34dcf389.png
[20210611145914757.png]: /images/20221005/ae320b227b644f7685cdb690a1274cd1.png
[20210611145927785.png]: /images/20221005/5a15de961ff141ba91cac34eafc11720.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTI4Njc0NA_size_16_color_FFFFFF_t_70 2]: /images/20221005/6bda927534a64b3fbdccaddaaf69f806.png
[2021061115160656.png]: /images/20221005/43cd2ea2c3e742f3b0d8a33e1f59fad6.png