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.
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
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
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.
//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：
/// <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);
}
}
