我浏览了多个博客等,试图找出如何使用Web API 2配置StructureMap,并且没有一个实现对我有用.混乱似乎在于MVC使用的不同的IDependency Resolver,以及Web API使用的.
首先,哪个是正确的Nuget包,其次,你如何使用纯Web API 2项目进行配置？
谢谢
这是我到目前为止,似乎是有效的.它是否正确？
public class StructureMapControllerActivator : IHttpControllerActivator
{
private readonly IContainer _container;
public StructureMapControllerActivator(IContainer container)
{
if (container == null) throw new ArgumentNullException("container");
_container = container;
}
public IHttpController Create(HttpRequestMessage request,HttpControllerDescriptor controllerDescriptor,Type controllerType)
{
try
{
var scopedContainer = _container.GetNestedContainer();
scopedContainer.Inject(typeof(HttpRequestMessage),request);
request.RegisterForDispose(scopedContainer);
return (IHttpController)scopedContainer.GetInstance(controllerType);
}
catch (Exception e)
{
// TODO : Logging
throw e;
}
}
}
解决方法
有几个链接,我试图解释我们如何使用(轻松)StructureMap和Web API：
> WebAPI + APIController with structureMap
> Configuring dependency injection with ASP.NET Web API 2.1
我们必须实现IHttpControllerActivator,它可以从已经配置的StructureMap ObjectFactory中获益：
public class ServiceActivator : IHttpControllerActivator
{
public ServiceActivator(HttpConfiguration configuration) {}
public IHttpController Create(HttpRequestMessage request,Type controllerType)
{
var controller = ObjectFactory.GetInstance(controllerType) as IHttpController;
return controller;
}
}
然后,我们必须注册我们的实现(global.asax)：
protected void Application_Start()
{
...
HttpConfiguration config = GlobalConfiguration.Configuration;
config.Services
.Replace(typeof(IHttpControllerActivator),new ServiceActivator(config));
...
