我有这个设置:
public static void Initialize(ISessionFactory factory)
{
var container = new Container();
InitializeContainer(container, factory);
container.RegisterMvcControllers(
Assembly.GetExecutingAssembly());
container.RegisterMvcAttributeFilterProvider();
container.Verify();
DependencyResolver.SetResolver(
new SimpleInjectorDependencyResolver(container));
}
private static void InitializeContainer(
Container container, ISessionFactory factory)
{
container.RegisterPerWebRequest<ISession>(
() => factory.OpenSession(), true);
}
在 Application_Start
中调用Initialize方法:
public class WebApiApplication : HttpApplication
{
protected void Application_Start()
{
SimpleInjectorInitializer.Initialize(
new NHibernateHelper(
Assembly.GetCallingAssembly(),
this.Server.MapPath("/"))
.SessionFactory);
AreaRegistration.RegisterAllAreas();
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
}
}
但是当我尝试调用控制器动作时,我得到一个 ArgumentException
:
类型'PositionReportApi.Controllers.PositionsController'没有默认构造函数
堆栈跟踪:
System.Web.Http.Dttpatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage请求,System.Web.Http.Internal.TypeActivator.Create [TBase](Type instanceType)中的System.Linq.Expressions.Expression.New(Type type) HttpControllerDescriptor controllerDescriptor,Type controllerType)
我无法注册 ISession
.
如何注册工厂创建的ISession?
1 回答
从堆栈跟踪中我可以看到您使用的是新的.NET 4.5 ASP.NET Web API,并且Simple Injector不在显示的调用图中 . 这可能意味着您没有向Web API的
GlobalConfiguration.Configuration.DependencyResolver
注册Simple Injector特定的System.Web.Http.Dependencies.IDependencyResolver
实现,您将获得默认行为,该行为仅适用于默认构造函数 .看一下Stackoverflow的回答Does Simple Injector supports MVC 4 ASP.NET Web API?,了解如何使用新的ASP.NET Web API配置Simple Injector .
UPDATE
请注意,即使您正确配置了
DependencyResolver
,也可以获得此异常,但是当您没有注册时,请明确注册Web API控制器 . 这是由Web API的设计方式引起的 .Always register your Controllers explicitly.