仍然不知道为什么你的版本不起作用,但这确实有效(正如我所期望的):
var container = new UnityContainer();
container
.RegisterType<IRepository, Repository>()
.RegisterType<IGateway, Gateway>( "FooGateway", new InjectionConstructor( "I am foo" ) )
.RegisterType<IGateway, Gateway>( "BarGateway", new InjectionConstructor( "I am bar" ) )
//.RegisterType<IServiceFoo, Service>( new InjectionConstructor( new ResolvedParameter<IRepository>(), new ResolvedParameter<IGateway>( "FooGateway" ) ) )
//.RegisterType<IServiceBar, Service>( new InjectionConstructor( new ResolvedParameter<IRepository>(), new ResolvedParameter<IGateway>( "BarGateway" ) ) );
.RegisterType<IServiceFoo>( new InjectionFactory( c => new Service( c.Resolve<IRepository>(), c.Resolve<IGateway>( "FooGateway" ) ) ) )
.RegisterType<IServiceBar>( new InjectionFactory( c => new Service( c.Resolve<IRepository>(), c.Resolve<IGateway>( "BarGateway" ) ) ) );
请注意,我正在使用InjectionFactory
代替InjectionConstructor
.
还有另一个有效的版本。这次我保留了您注册服务的方式,但我让它们命名并按名称解析:
var container = new UnityContainer();
container
.RegisterType<IRepository, Repository>()
.RegisterType<IGateway, Gateway>( "FooGateway", new InjectionConstructor( "I am foo" ) )
.RegisterType<IGateway, Gateway>( "BarGateway", new InjectionConstructor( "I am bar" ) )
.RegisterType<IServiceFoo, Service>( "sf", new InjectionConstructor( new ResolvedParameter<IRepository>(), new ResolvedParameter<IGateway>( "FooGateway" ) ) )
.RegisterType<IServiceBar, Service>( "sb", new InjectionConstructor( new ResolvedParameter<IRepository>(), new ResolvedParameter<IGateway>( "BarGateway" ) ) );
//.RegisterType<IServiceFoo>( new InjectionFactory( c => new Service( c.Resolve<IRepository>(), c.Resolve<IGateway>( "FooGateway" ) ) ) )
//.RegisterType<IServiceBar>( new InjectionFactory( c => new Service( c.Resolve<IRepository>(), c.Resolve<IGateway>( "BarGateway" ) ) ) );
var barGateway = container.Resolve<IGateway>( "BarGateway" );
var fooGateway = container.Resolve<IGateway>( "FooGateway" );
var serviceBar = container.Resolve<IServiceBar>( "sb" );
var serviceBarGatewayName = serviceBar.DoSomething();
var serviceFoo = container.Resolve<IServiceFoo>( "sf" );
var serviceFooGatewayName = serviceFoo.DoSomething();