ASP.Net MVC 4 Web API 控制器不适用于 Unity.WebApi [英] ASP.Net MVC 4 Web API controller doesn't work with Unity.WebApi
问题描述
我的 ASP.Net MVC 4 Web API 控制器不适用于 Unity.WebApi.在同一个项目中,简单的控制器与 Unity.Mvc3 一起正常工作.但是当我运行从 ApiController 派生的 Web API 控制器时,我收到一条消息:
My ASP.Net MVC 4 Web API controller doesn't work with Unity.WebApi. In the same project simple controllers works with Unity.Mvc3 properly. But when I run Web API controller derived from ApiController I'm getting a message:
{"$id":"1","Message":"发生错误.","ExceptionMessage":"Type'ElectricTests.Controllers.Api.DocumentsController' 没有默认构造函数","ExceptionType":"System.ArgumentException","StackTrace":"在 System.Linq.Expressions.Expression.New(Type type)\r\n 在System.Web.Http.Internal.TypeActivator.Create[TBase](Type实例类型)\r\n 在System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator(HttpRequestMessage请求,类型控制器类型,Func`1&激活器)\r\n 在System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage请求,HttpControllerDescriptor 控制器描述符,类型控制器类型)"}
{"$id":"1","Message":"An error has occurred.","ExceptionMessage":"Type 'ElectricTests.Controllers.Api.DocumentsController' does not have a default constructor","ExceptionType":"System.ArgumentException","StackTrace":" at System.Linq.Expressions.Expression.New(Type type)\r\n at System.Web.Http.Internal.TypeActivator.Create[TBase](Type instanceType)\r\n at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator(HttpRequestMessage request, Type controllerType, Func`1& activator)\r\n at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)"}
我的 ApiController:
My ApiController:
public class DocumentsController : ApiController
{
private readonly IDocumentsRepository _repository;
public DocumentsController(IDocumentsRepository repository) {
_repository = repository;
}
public IEnumerable<FormattedDocument> GetFormattedDocuments()
{
return _repository.GetAllFormattedDocuments();
}
...
Bootstrapper.cs:
Bootstrapper.cs:
public static class Bootstrapper {
public static void Initialise() {
IUnityContainer container = BuildUnityContainer();
DependencyResolver.SetResolver(new UnityDependencyResolver(container));
}
private static IUnityContainer BuildUnityContainer() {
var container = new UnityContainer();
// register all your components with the container here
// it is NOT necessary to register your controllers
// e.g. container.RegisterType<ITestService, TestService>();
container.RegisterType<IDocumentsRepository, DocumentsRepository>();
container.RegisterType<IQuestionsRepository, QuestionsRepository>();
container.RegisterType<ITestRepository, TestsRepository>();
return container;
}
}
我的错误在哪里?
推荐答案
Controller 和 ApiController 的处理方式不同,因为它们的基类完全不同:
The handling of Controller and ApiController is different as they have completely different base classes:
我将 Unity.MVC4 库用于控制器 DI (http://www.nuget.org/packages/Unity.MVC4/)
I use Unity.MVC4 library for controller DI (http://www.nuget.org/packages/Unity.MVC4/)
Install-Package Unity.MVC4
和用于 DI 的 Unity.WebAPI (http://www.nuget.org/packages/Unity.WebAPI/)
and Unity.WebAPI for DI (http://www.nuget.org/packages/Unity.WebAPI/)
Install-Package Unity.WebAPI
你的引导程序应该是两者的结合:
Your bootstrapper should be a combination of both:
DependencyResolver.SetResolver(new Unity.Mvc4.UnityDependencyResolver(container));
GlobalConfiguration.Configuration.DependencyResolver = new Unity.WebApi.UnityDependencyResolver(container);
注意我还必须添加一些注册才能使帮助页面正常工作
Note I also had to do to add some registration to get the Help page to work
container.RegisterInstance(typeof (HttpConfiguration), GlobalConfiguration.Configuration);
作为 Unity.MVC4 的所有者,我正在考虑在我们的库中实现 WebApi.
As the owner of Unity.MVC4 I am looking at getting WebApi implemented within our library.
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