ASP.Net MVC 4的Web API控制器不到风度工作，Unity.WebApi [英] ASP.Net MVC 4 Web API controller dosn't work with Unity.WebApi

问题描述

我的ASP.Net MVC 4的Web API控制器用不到风度工作Unity.WebApi。在同一个项目中简单的控制器，Unity.Mvc3正常工作。但是，当我运行的Web API控制器从ApiController我得到一个消息来源：

My ASP.Net MVC 4 Web API controller dosn'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:

{的$ id：1，消息：发生错误，ExceptionMessage：类型
  'ElectricTests.Controllers.Api.DocumentsController'没有一个
  默认
  构造函数，ExceptionType：System.ArgumentException，堆栈跟踪：
  在System.Linq.Ex pressions.Ex pression.New（type类型）\\ r \\ n在
  System.Web.Http.Internal.TypeActivator.Create [TBASE]（类型
  instanceType）\\ r \\ n在
  System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator（HTT prequestMessage
  要求，类型controllerType，Func`1＆安培;激活剂）\\ r \\ n在
  System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create（HTT prequestMessage
  要求，HttpControllerDescriptor controllerDescriptor，类型
  controllerType）}

{"$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;
    }
}

哪里是我的错？

推荐答案

控制器和ApiController的处理是不同的，因为它们有完全不同的基类：

The handling of Controller and ApiController is different as they have completely different base classes:

我用Unity.MVC4库控制器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Unity.WebAPI的DI（<一个href=\"http://www.nuget.org/packages/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

您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);

请注意我也不得不做添加一些注册，以获得帮助页面正常工作

Note I also had to do to add some registration to get the Help page to work

container.RegisterInstance(typeof (HttpConfiguration), GlobalConfiguration.Configuration);

由于Unity.MVC4的所有者我期待在获得我们的图书馆内实施的WebAPI。

As the owner of Unity.MVC4 I am looking at getting WebApi implemented within our library.

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