ASP.NET Web API与ninject的绑定

Question

我刚刚安装了mvc4 rc更新,我正在尝试构建一个运气不好的api应用程序.

我正在使用ninject但是无法加载我的控制器.我一直在收到错误

类型'Api.Controllers.ConsumerController'没有默认构造函数

我对mvc和使用注射剂都很新,所以请耐心等待.

我没有对通过nuget创建的默认绑定做任何特殊操作

 public static class NinjectWebCommon 
{
    private static readonly Bootstrapper bootstrapper = new Bootstrapper();

    /// <summary>
    /// Starts the application
    /// </summary>
    public static void Start() 
    {
        DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
        DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
        bootstrapper.Initialize(CreateKernel);
    }

    /// <summary>
    /// Stops the application.
    /// </summary>
    public static void Stop()
    {
        bootstrapper.ShutDown();
    }

    /// <summary>
    /// Creates the kernel that will manage your application.
    /// </summary>
    /// <returns>The created kernel.</returns>
    private static IKernel CreateKernel()
    {
        var kernel = new StandardKernel();
        kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
        kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();

        RegisterServices(kernel);
        return kernel;
    }

    /// <summary>
    /// Load your modules or register your services here!
    /// </summary>
    /// <param name="kernel">The kernel.</param>
    private static void RegisterServices(IKernel kernel)
    {
        kernel.Bind<IConsumerRepository>().To<ConsumerRepository>();
    }        
}

我的控制器看起来像

   private readonly IConsumerRepository _repository;

    public ConsumerController(IConsumerRepository repository)
    {
        _repository = repository;
    }

    [HttpGet]
    public IQueryable<Consumer> Get(Guid id)
    {
        return _repository.Get(id).AsQueryable();
    }

为了让api控制器与ninject一起工作,我需要做什么？

对不起,如果这是简单的东西

然而,在将webcommon.cs更改为此之后,我尝试了您的建议迈克尔

  private static IKernel CreateKernel()
    {
        var kernel = new StandardKernel();
        kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
        kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();

        RegisterServices(kernel);
        GlobalConfiguration.Configuration.DependencyResolver = new NinjectDependencyResolver(kernel);
        return kernel;
    }

    /// <summary>
    /// Load your modules or register your services here!
    /// </summary>
    /// <param name="kernel">The kernel.</param>
    private static void RegisterServices(IKernel kernel)
    {
        kernel.Bind<IConsumerRepository>().To<ConsumerRepository>();
    }

我什么时候出错

var kernel = new StandardKernel();

叫做

从程序集'Ninject.Web.WebApi,Version = 3.0.0.0,Culture = neutral,PublicKeyToken = c7192dc5380945e7'类型'Ninject.Web.WebApi.Filter.DefaultFilterProvider'中的方法'GetFilters'没有实现.

我错过了什么？

Answer 1

我向布拉德·威尔逊询问过这个问题,并且MVC4 RC已经改变了.

GlobalConfiguration.Configuration.ServiceResolver已移至GlobalConfiguration.Configuration.DependencyResolver

使用此实现为您的Web Api创建Ninject DependencyResolver:https: //gist.github.com/2417226

在NinjectWebCommon.cs中:

// Register Dependencies
RegisterServices(kernel);

// Set Web API Resolver
GlobalConfiguration.Configuration.DependencyResolver = new NinjectDependencyResolver(kernel);

Answer 2

此一般错误消息

类型'Api.Controllers.ConsumerController'没有默认构造函数

如果你没有使你的构造函数公开,或者IoC容器无法解析依赖关系,也可能因为缺少参数而发生.

至少可以说错误信息是误导性的.

Answer 3

您可以安装NuGet包WebApiContrib.IoC.Ninject并将以下代码行添加到NinjectWebCommon.cs

GlobalConfiguration.Configuration.DependencyResolver = new NinjectResolver(kernel);