如果我要實現對ASP.NET MVC控制器依賴注入,我可以用IControllerFactory
界面來創建一個工廠類,然後在Global.asax.cs中進行註冊,如:是否有任何ASP.NET Web API的HttpControllerBuilder?
ControllerBuilder.Current.SetControllerFactory(controllerFactory)
(參考:現在http://www.dotnetcurry.com/ShowArticle.aspx?ID=786)
我的問題是:
我怎麼能設置一個工廠的IHttpControllerActivator
派生類?
我們有東西在ASP.NET MVC 4.0,如:
HttpControllerBuilder.Current.SetApiControllerActivator(httpControllerActivator)
?
更新:
我想補充我當前的代碼,它可能有助於瞭解的情況:
我定製HttpControllerActivator:
public class MyCustomApiActivator : DefaultHttpControllerActivator
//or IHttpControllerActivator ?
{
private readonly Dictionary<string, Func<HttpRequestMessage, IHttpController>> _apiMap;
public MyCustomApiActivator(IMyRepository repository)
{
if (repository == null)
{
throw new ArgumentException("repository");
}
_apiMap = new Dictionary<string, Func<HttpRequestMessage, IHttpController>>();
controllerMap["Home"] = context => new HomeController();
_apiMap["MyCustomApi"] = context => new MyCustomApiController(repository);
}
public IHttpController Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
{
if(_apiMap.ContainsKey(controllerType.Name))
return _apiMap[controllerType.Name](request);
return null;
}
}
我的作文根:
public class CompositionRoot
{
private readonly IHttpControllerActivator _apiControllerActivator;
public CompositionRoot()
{
_apiControllerActivator = CompositionRoot.CreateHttpControllerActivator();
}
public IHttpControllerActivator ApiControllerActivator
{
get { return _apiControllerActivator; }
}
private static IHttpControllerActivator CreateHttpControllerActivator()
{
string defaultRepositoryTypeName = ConfigurationManager.AppSettings["DefaultRepositoryTypeName"];
var defaultRepositoryType = Type.GetType(defaultRepositoryTypeName, true);
var defaultRepository = (IMyRepository)Activator.CreateInstance(defaultRepositoryType);
var apiController = new MyCustomApiActivator(defaultRepository);
return apiController;
}
}
最後,這是我的Global.asax.cs
,我需要一招內:
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
WebApiConfig.Register(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
var root = new CompositionRoot();
//The following line raise this compile-time error:
// cannot convert from 'System.Web.Http.Dispatcher.IHttpControllerActivator'
// to 'System.Web.Mvc.IControllerFactory'
ControllerBuilder.Current.SetControllerFactory(root.ApiControllerActivator);
}
爲什麼'Create'方法不會觸發?我回一個通用控制器'公共IHttpController創建( HttpRequestMessage要求, HttpControllerDescriptor controllerDescriptor, 類型_controllerType) {回報(IHttpController)新GenericApiController(); }' –
Bellash