4

我安装了 Umbraco 8.1.3，我正在尝试在这篇文章之后配置依赖注入，但不起作用。我的代码是：

控制器：

public class ContactController : UmbracoApiController
{
    private readonly IContactService contactService;

    public ContactController(IContactService contactService)
    {
        this.contactService = contactService;
    }

    [HttpPost]
    public void Post([FromBody]ContactDto request)
    {
        this.contactService.Register(request);
    }
}

服务：

public interface IContactService
{
    void Register(ContactDto contact);
}



public class ContactService : IContactService
{
    public ContactService()
    {
    }

    public void Register(ContactDto contact)
    {
      //Implement
    }
}

DI配置：

public class ApplicationComposer : IUserComposer
{
    public void Compose(Composition composition)
    {
        composition.RegisterFor<IContactService, ContactService>();
    }
}

错误是：

“Message”：“发生错误。”，“ExceptionMessage”：“尝试创建'ContactController'类型的控制器时发生错误。确保控制器具有无参数的公共构造函数。”，“ExceptionType”：“ System.InvalidOperationException", "StackTrace": " 在 System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage 请求，HttpControllerDescriptor controllerDescriptor，类型 controllerType)\r\n 在 System.Web.Http.Dispatcher.HttpControllerDispatcher.d__15.MoveNext ()", "InnerException": { "Message": "发生错误。", "ExceptionMessage": "无法解析类型：MySite.Controllers.ContactController，服务名称：", "ExceptionType": "System.InvalidOperationException", "StackTrace": " at LightInject.ServiceContainer.CreateDelegate(Type serviceType, String serviceName, Boolean throwError) in C:\projects\lightinject\src\LightInject\LightInject.cs:line 4748\r \n 在 LightInject.ServiceContainer.CreateDefaultDelegate(Type serviceType, Boolean throwError) 在 C:\projects\lightinject\src\LightInject\LightInject.cs:line 4705\r\n 在 LightInject.ServiceContainer.TryGetInstance(Type serviceType) 在 C: \projects\lightinject\src\LightInject\LightInject.cs:line 3493\r\n 在 System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator（HttpRequestMessage 请求，类型 controllerType，FuncCreateDelegate(Type serviceType, String serviceName, Boolean throwError) in C:\projects\lightinject\src\LightInject\LightInject.cs:line 4748\r\n at LightInject.ServiceContainer.CreateDefaultDelegate(Type serviceType, Boolean throwError) in C:\ projects\lightinject\src\LightInject\LightInject.cs:line 4705\r\n at LightInject.ServiceContainer.TryGetInstance(Type serviceType) in C:\projects\lightinject\src\LightInject\LightInject.cs:line 3493\r\n在 System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator（HttpRequestMessage 请求，类型 controllerType，FuncCreateDelegate(Type serviceType, String serviceName, Boolean throwError) in C:\projects\lightinject\src\LightInject\LightInject.cs:line 4748\r\n at LightInject.ServiceContainer.CreateDefaultDelegate(Type serviceType, Boolean throwError) in C:\ projects\lightinject\src\LightInject\LightInject.cs:line 4705\r\n at LightInject.ServiceContainer.TryGetInstance(Type serviceType) in C:\projects\lightinject\src\LightInject\LightInject.cs:line 3493\r\n在 System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator（HttpRequestMessage 请求，类型 controllerType，Func\projects\lightinject\src\LightInject\LightInject.cs:line 4705\r\n at LightInject.ServiceContainer.TryGetInstance(Type serviceType) in C:\projects\lightinject\src\LightInject\LightInject.cs:line 3493\r\ n 在 System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator（HttpRequestMessage 请求，类型 controllerType，Func\projects\lightinject\src\LightInject\LightInject.cs:line 4705\r\n at LightInject.ServiceContainer.TryGetInstance(Type serviceType) in C:\projects\lightinject\src\LightInject\LightInject.cs:line 3493\r\ n 在 System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator（HttpRequestMessage 请求，类型 controllerType，Func1& activator)\r\n at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)", "InnerException": { "Message": "An error has occurred.", "ExceptionMessage": "Unresolved dependency [Target Type: MySite.Controllers.ContactController], [Parameter: contactService(IServices.Contacts.IContactService)], [Requested dependency: ServiceType:IServices.Contacts.IContactService, ServiceName:]", "ExceptionType": "System.InvalidOperationException", "StackTrace": " at LightInject.ServiceContainer.EmitConstructorDependency(IEmitter emitter, Dependency dependency) in C:\\projects\\lightinject\\src\\LightInject\\LightInject.cs:line 4163\r\n at LightInject.ServiceContainer.EmitConstructorDependencies(ConstructionInfo constructionInfo, IEmitter emitter, Action1 decoratorTargetEmitter) 在 C:\projects\lightinject\src\LightInject\LightInject.cs:line 4120\r\n 在 LightInject.ServiceContainer.EmitNewInstanceUsingImplementingType(IEmitter 发射器, ConstructionInfo constructionInfo, Action 1 decoratorTargetEmitMethod) in C:\\projects\\lightinject\\src\\LightInject\\LightInject.cs:line 4081\r\n at LightInject.ServiceContainer.EmitNewInstance(ServiceRegistration serviceRegistration, IEmitter emitter) in C:\\projects\\lightinject\\src\\LightInject\\LightInject.cs:line 4038\r\n at LightInject.ServiceContainer.CreateDynamicMethodDelegate(Action1 serviceEmitter) 在 C:\projects\lightinject\ src\LightInject\LightInject.cs：C:\projects\lightinject\src\LightInject\LightInject 中 LightInject.ServiceContainer.CreateInstanceDelegateIndex(Action 1 emitMethod) in C:\\projects\\lightinject\\src\\LightInject\\LightInject.cs:line 4693\r\n at System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func 2 valueFactory)\r\n at LightInject.ServiceContainer.EmitLifetime(ServiceRegistration serviceRegistration, Action1 emitMethod, IEmitter 发射器) 的第 3777 行\r\n。 c:\projects\lightinject\src\LightInject\LightInject.cs：LightInject.ServiceContainer.<>c__DisplayClass153_0.b__0(IEmitter ms) 中的第 4664 行\r\n：LightInject.ServiceContainer.CreateDynamicMethodDelegate 中的第 3856 行\r\n （行动1 serviceEmitter) in C:\\projects\\lightinject\\src\\LightInject\\LightInject.cs:line 3777\r\n at LightInject.ServiceContainer.CreateDelegate(Type serviceType, String serviceName, Boolean throwError) in C:\\projects\\lightinject\\src\\LightInject\\LightInject.cs:line 4743", "InnerException": { "Message": "An error has occurred.", "ExceptionMessage": "Missing public constructor for Type: IServices.Contacts.IContactService", "ExceptionType": "System.InvalidOperationException", "StackTrace": " at LightInject.MostResolvableConstructorSelector.Execute(Type implementingType) in C:\\projects\\lightinject\\src\\LightInject\\LightInject.cs:line 5558\r\n at LightInject.TypeConstructionInfoBuilder.Execute(Registration registration) in C:\\projects\\lightinject\\src\\LightInject\\LightInject.cs:line 5719\r\n at System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func`2 valueFactory)\r\n 在 C:\projects\lightinject\src\LightInject\LightInject.cs:line 4028 中的 LightInject.ServiceContainer.EmitNewInstance(ServiceRegistration serviceRegistration, IEmitter 发射器)\r\ n 在 LightInject.ServiceContainer.<>c__DisplayClass153_0.b__0(IEmitter ms) 在 C:\projects\lightinject\src\LightInject\LightInject.cs:line 3856\r\n 在 LightInject.ServiceContainer.<>c__DisplayClass153_0.b__0(IEmitter ms ) 在 C:\projects\lightinject\src\LightInject\LightInject.cs:line 3856\r\n 在 C:\projects\lightinject\src\LightInject\LightInject 中的 LightInject.ServiceContainer.EmitConstructorDependency(IEmitter 发射器，依赖依赖项)。 cs:第 4158 行" } }

有谁能够帮我？

4

1 回答 1

5

After of inspect UmbracoCore code, more exactly LightInjectContainer.cs i found issue at RegisterFor(Lifetime lifetime = Lifetime.Transient) method:

 public void RegisterFor<TService, TTarget>(Lifetime lifetime = Lifetime.Transient)
        where TService : class
        => RegisterFor<TService, TTarget>(typeof(TService), lifetime);

TTarget type never is used, then implementation class never will be required.

To fix that, i implemented a extension method of Umbraco Composition class

public static class CompositionExtension
{
    public static void Register<TService, TTarget>(this Composition composition, Lifetime lifetime = Lifetime.Transient) where TTarget : class
    {
        composition.Register(typeof(TService), typeof(TTarget), lifetime);
    }

}

Then my DI Config is:

public class ApplicationComposer : IUserComposer
{
    public void Compose(Composition composition)
    {
        composition.Register<IContactService, ContactService>();
    }
}
于 2019-09-02T20:29:08.390 回答