RegisterServices中的NinjectWebCommon绑定在WebApi中不适用于我

Question

我创建了一个新的ASP.NET Web API项目.然后我使用nuget来拉Ninject.Web.Common,然后从这里下载并构建Ninject.Web.WebApi .包含在项目中.我添加了一个服务和注入通过构造函数,设置绑定(调试器显示代码实际上命中绑定)但仍然抛出此错误:

Error activating IValueService
No matching bindings are available, and the type is not self-bindable.
Activation path:
  2) Injection of dependency IValueService into parameter valueService of constructor of type ValuesController
  1) Request for ValuesController

Suggestions:
  1) Ensure that you have defined a binding for IValueService.
  2) If the binding was defined in a module, ensure that the module has been loaded into the kernel.
  3) Ensure you have not accidentally created more than one kernel.
  4) If you are using constructor arguments, ensure that the parameter name matches the constructors parameter name.
  5) If you are using automatic module loading, ensure the search path and filters are correct.

我项目中的图书馆:

1. Ninject.dll
2. Ninject.Web.Common
3. Ninject.Web.Webapi
4. WebActivator

所有ninject库都标记为版本3.

这是代码:

[assembly: WebActivator.PreApplicationStartMethod(typeof(MvcApplication3.App_Start.NinjectWebCommon), "Start")]
[assembly: WebActivator.ApplicationShutdownMethodAttribute(typeof(MvcApplication3.App_Start.NinjectWebCommon), "Stop")]
namespace MvcApplication3.App_Start
{
using System;
using System.Web;

using Microsoft.Web.Infrastructure.DynamicModuleHelper;

using Ninject;
using Ninject.Web.Common;

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<IValueService>().To<ValueService>();
    }        
}

}

服务:

public interface IValueService
{
    List<string> GetStrings();
}

public class ValueService : IValueService
{
    public List<string> GetStrings()
    {
        return new List<string>{"test", "test"};
    }
}

控制器:

public class ValuesController : ApiController
{
    private readonly IValueService valueService;

    // GET /api/values
    public ValuesController(IValueService valueService)
    {
        this.valueService = valueService;
    }
}

从github下载的项目示例有效,但在我创建新项目时却没有.我错过了一步吗？

Answer 1

我刚刚检查过这个扩展没有问题(至少没有最新的MVC4预览版):

• 创建一个新的MVC4 WEB Api项目
• Nuget Install-Package Ninject.Web.WebAPI
• 更改控制器+添加绑定

你的代码看起来不错.其他地方一定有问题.