当使用Castle Windsor通过(DI / IoC)模式相应地注册控制器及其依赖关系时,我在控制器上获得了“为此对象定义的无参数构造函数”.有人可以看看下面的内容,看看我的错误,因为我看不到它.
@H_403_4@public class MyApplication : System.Web.HttpApplication
{
public MvcApplication()
{
this.container = new WindsorContainer().Install(new DependencyInstaller());
}
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
WebApiConfig.Register(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
GlobalConfiguration.Configuration.Services.Replace(typeof(IHttpControllerActivator),new WindsorActivator(this.container));
}
}
我的DI
@H_403_4@public class DependencyInstaller : IWindsorInstaller { public void Install(IWindsorContainer container,IConfigurationStore store) { container.Register( Component.For<IDatabaseFactory>().ImplementedBy<DatabaseFactory>().LifeStyle.PerWebRequest,Component.For<IUnitOfWork>().ImplementedBy<UnitOfWork>().LifeStyle.PerWebRequest,Component.For<IMappingEngine>().ImplementedBy<MappingEngine>().UsingFactoryMethod(() => Mapper.Engine).LifeStyle.Singleton,Component.For<IFirmTasks>().ImplementedBy<FirmTasks>().LifeStyle.PerWebRequest,Classes.FromAssemblyContaining<PersonController>().BasedOn<IController>().LifestyleTransient(),Classes.FromThisAssembly().BasedOn<IHttpController>().LifestyleTransient(),Classes.FromAssemblyNamed("Core.Firm.Tasks").Where(type => type.Name.EndsWith("Tasks")).WithServiceAllInterfaces().LifestylePerWebRequest(),Classes.FromAssemblyNamed("Core.Firm.Repository") .Where(type => type.Name.EndsWith("Repository")).WithServiceAllInterfaces().LifestylePerWebRequest() ); } }我的控制器
@H_403_4@public class PersonController : Controller { private IFirmTasks tasks; public PersonController(IFirmTasks tasks) { this.tasks = tasks; }当我加载应用程序时,容器加载正常,所有依赖项按照调试时的屏幕截图解析.
那里的任何人都知道我的失败所在.提前致谢.
解决方法
When I load the application the container loads fine with all dependencies resolved as per screen shot on debug.
是的,您的所有类型都已注册.
如果你写var controller = container.Resolve< PersonController>();在Global.asax中,您应该获得控制器的实例.
您的实现对Asp.Net WebApi有效,它仅适用于System.Web.Http.ApiControllers.
您的代码无法正常工作,因为您的PersonController继承了System.Web.Mvc.Controller并使用了System.Web.Mvc.DefaultControllerFactory.你可以在第一张图片中看到它.
您应该在Global.asax中编写和注入自定义ControllerFactory,以便创建Asp.Net MVC控制器.
@H_403_4@//Set the controller builder to use our custom controller factory var controllerFactory = new WindsorControllerFactory(container); ControllerBuilder.Current.SetControllerFactory(controllerFactory);你可以阅读more in this answer on another SO question.
这是WindsorControllerFactory的默认实现：
@H_403_4@/// <summary> /// Controller factory the class is to be used to eliminate hard-coded dependencies /// between controllers and other components /// </summary> public class ControllerFactory : DefaultControllerFactory { private readonly IWindsorContainer container; public WindsorControllerFactory(IWindsorContainer container) { this.container = container; } public override void ReleaseController(IController controller) { container.Release(controller.GetType()); } protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext,Type controllerType) { return (IController)container.Resolve(controllerType); } }