ASP.NET MVC 5 使用autofac實現DI

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• 使用Nuget添加Autofac.MVC的引用
• 啟動項設定
• 註冊Controller
• 註冊ModelBinder
• 註冊相關的web abstraction
• 為View層啟用屬性注入
• 為Action Filter啟用屬性注入

 

   使用Nuget添加Autofac.MVC的引用

       

 啟動項設定

 protected void Application_Start()        {            AreaRegistration.RegisterAllAreas();            RouteConfig.RegisterRoutes(RouteTable.Routes);            var builder = new ContainerBuilder();            builder.RegisterType<BookService>().As<IBookService>();            builder.RegisterType<Logger>().As<ILogger>();            // Register your MVC controllers. (MvcApplication is the name of            // the class in Global.asax.)            builder.RegisterControllers(typeof(MvcApplication).Assembly);            // OPTIONAL: Register model binders that require DI.            builder.RegisterModelBinders(typeof(MvcApplication).Assembly);            builder.RegisterModelBinderProvider();            // OPTIONAL: Register web abstractions like HttpContextBase.            builder.RegisterModule<AutofacWebTypesModule>();            // OPTIONAL: Enable property injection in view pages.            builder.RegisterSource(new ViewRegistrationSource());            // OPTIONAL: Enable property injection into action filters.            builder.RegisterFilterProvider();            // Set the dependency resolver to be Autofac.            var container = builder.Build();            DependencyResolver.SetResolver(new AutofacDependencyResolver(container));        }

 註冊Controller

1. 註冊當前程式集下的所有Controller
   1. builder.RegisterControllers(typeof(MvcApplication).Assembly);
2. 註冊單個Controller

   1. builder.RegisterType<HomeController>().InstancePerRequest();

  註冊ModelBinder

1. 在啟動項中註冊ModelBinder
   1. builder.RegisterModelBinders(typeof(MvcApplication).Assembly);
      builder.RegisterModelBinderProvider();
2. 自訂ModelBinder並且設定ModelBinderTypeAttribute

    [ModelBinderType(typeof(Book))]    public class BookModelBinder : IModelBinder    {       public ILogger logger;      public BookModelBinder(ILogger logger)        {            this.logger = logger;        }        public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)        {            HttpRequestBase request = controllerContext.HttpContext.Request;                      string title = request.Form.Get("Title");            string BookID = request.Form.Get("BookID");            string day = request.Form.Get("Day");            string month = request.Form.Get("Month");            string year = request.Form.Get("Year");            return new Book { BookID=BookID, Title=title+":DI Test"+this.logger.Log("dsa")+request.Form.Get("HttpRequestBaseDI"), Date=year+"-"+month+"-"+day };        }    }

 註冊相關的Web Abstract Class

1. 啟動項設定

   // OPTIONAL: Register web abstractions like HttpContextBase.
     builder.RegisterModule<AutofacWebTypesModule>();

2. 執行個體（在ModelBinder中使用HttpRequestBase）

   [ModelBinderType(typeof(Book))]    public class BookModelBinder : IModelBinder    {       ILogger logger;       HttpRequestBase request1;      public BookModelBinder(ILogger logger, HttpRequestBase request)        {            this.logger = logger;            this.request1 = request;        }        public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)        {            HttpRequestBase request = controllerContext.HttpContext.Request;            request = request1;            string title = request.Form.Get("Title");            string BookID = request.Form.Get("BookID");            string day = request.Form.Get("Day");            string month = request.Form.Get("Month");            string year = request.Form.Get("Year");            return new Book { BookID=BookID, Title=title+":DI Test"+this.logger.Log("dsa")+request.Form.Get("HttpRequestBaseDI"), Date=year+"-"+month+"-"+day };        }    }

 在View層實現屬性注入

1. 啟動項設定

   builder.RegisterSource(new ViewRegistrationSource());

2. 實現自訂的ViewPage

   這裡的例子使用的是一個強型別的View，所以實現了一個泛型ViewPage

    public abstract class CustomViewPage<T> : WebViewPage<T>
       {
           public ILogger Logger { get; set; }
       } 
3. View設定

@inherits MVC5Practices.Infrastructure.CustomViewPage<MVC5Practices.Infrastructure.Book>@{    Layout = null;}<!DOCTYPE html><html><head>    <meta name="viewport" content="width=device-width" />    <title>ShowBook</title></head><body>    <div>        <h4>Book</h4>        <h5>@Logger.Log("dsa")</h5>        <hr />        <dl class="dl-horizontal">            <dt>                @Html.DisplayNameFor(model => model.Title)            </dt>                <dd>                @Html.DisplayFor(model => model.Title)            </dd>                <dt>                @Html.DisplayNameFor(model => model.Date)            </dt>                <dd>                @Html.DisplayFor(model => model.Date)            </dd>            </dl>    </div>    <p>        @Html.ActionLink("Edit", "Edit", new { id = Model.BookID }) |        @Html.ActionLink("Back to List", "Index")    </p></body></html>

 為ActionFilter啟用屬性設定

1. 啟動項設定

   // OPTIONAL: Enable property injection into action filters.
   builder.RegisterFilterProvider();

2. 自訂Filter

 public class CustomActionFilter : ActionFilterAttribute    {        public ILogger Logger { get; set; }        public override void OnActionExecuting(ActionExecutingContext filterContext)        {            Logger.Log("OnActionExecuting");        }    }

 

ASP.NET MVC 5 使用autofac實現DI