asp.net mvc4 简单使用Autofac依赖注入小结
1,首先使用 NuGet下载适当的Autofac版本
文件一,Autofac.3.5.2
文件二,Autofac.Mvc4.3.1.0
1,接口类
public interface IRepository { void GetListCount(); }
2,实现类
public class Repository:IRepository { public void GetListCount() { //return 1; } }
3,控制器
public class HomeController : Controller { private IRepository _iRepository; public HomeController(IRepository iRespository) { _iRepository = iRepository; } public ActionResult Center() { ViewBag.Name = _iRepository.GetType().Name; return View(); } }
4,在Global中使用autofac依赖注入
protected void Application_Start() { AreaRegistration.RegisterAllAreas(); WebApiConfig.Register(GlobalConfiguration.Configuration); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes); BundleConfig.RegisterBundles(BundleTable.Bundles); //注册方法1 //ContainerBuilder builder = new ContainerBuilder(); //var baseType = typeof(IDependency); //var assemblys = AppDomain.CurrentDomain.GetAssemblies().ToList(); //var AllServices = // assemblys.SelectMany(s => s.GetTypes()) // .Where(p => baseType.IsAssignableFrom(p) && p != baseType); //builder.RegisterAssemblyTypes(assemblys.ToArray()); //builder.RegisterAssemblyTypes(assemblys.ToArray()) // .Where(t => baseType.IsAssignableFrom(t) && t != baseType) // .AsImplementedInterfaces().InstancePerLifetimeScope(); //Autofac注册方法2 ContainerBuilder builder = new ContainerBuilder(); var service = Assembly.Load("Service"); builder.RegisterControllers(Assembly.GetExecutingAssembly()); builder.RegisterAssemblyTypes(service).AsImplementedInterfaces(); var container = builder.Build(); DependencyResolver.SetResolver(new AutofacDependencyResolver(container)); } }
注:Assembly.Load("Service") 加载的是名为Service的类库 及加载整个Service实现类
最后,其实 Autofac 的使用方式还有很多更进阶的操作,而这一篇只是拿现有项目来导入使用,现有项目并不是特别复杂,所以使用 Autofac 的注册类别设定看起来就蛮简单的,不过 Autofac 也是有比较进阶的操作处理方式,可以在注册类别的使用 Lambda 语法将注册的类别做过滤,节省系统找寻可注册类别的时间,如下:
Assembly.Load("Service").Where(t=>t.Name.EndWith("Service")).AsImplementedInterfaces();
注 where里的Service是加载Service类库中以Service结尾的实现类
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