服务注册

Question

在App_Start期间，我遇到了请求服务实例的问题。以下错误表明该服务未注册。在下面的例子中，它是＆＃34; AService＆＃34;被涂黑了。

Bellow是抛出的异常：

以下代码将所有服务注册到容器中。

public override void Bind(ref IContainer container)
{
    base.Bind(ref container);

    container.Register<IAService, AService>(DependencyScope.PerInstance);
    container.Register<IBService, BService>(DependencyScope.PerInstance);
    container.Register<ICService, CService>(DependencyScope.PerInstance);
    container.Register<IDService, DService>(DependencyScope.PerInstance);            
    container.Register<IHelperService, HelperService>(DependencyScope.PerInstance);         
}

以下代码是手动创建服务及其所有依赖项的测试。

DbContext context = new DbContext("myConnectionString");
DataManager manager = new DataManager(context);
AService service = new AService(manager, new HelperService());

堆栈跟踪

   at SimpleInjector.InstanceProducer.VerifyExpressionBuilding()
   at SimpleInjector.Container.VerifyThatAllExpressionsCanBeBuilt(InstanceProducer[] producersToVerify)
   at SimpleInjector.Container.VerifyThatAllExpressionsCanBeBuilt()
   at SimpleInjector.Container.VerifyInternal(Boolean suppressLifestyleMismatchVerification)
   at SimpleInjector.Container.Verify()