Question

我已经阅读了我能找到的每个Stack Overflow问题，但无济于事。当我通过NuGet安装Ninject包时，没有安装NinjectWebCommon.cs类，所以我自己编写了代码（下面）。我安装了Ninject，Ninject.WebCommon，Ninject.Webcommon.Webhost，Ninject.WebApi，Ninject.WebApi.DependencyResolver。但是，我在控制器中得到了众所周知的消息，我必须有一个无参数控制器，当然我不想要，因为我想要DI。

这是我创建的Ninject类：

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);
        System.Web.Http.GlobalConfiguration.Configuration.DependencyResolver = new Ninject.WebApi.DependencyResolver.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.Load(Assembly.GetExecutingAssembly());
        kernel.Bind<IUnitsSL>().To<UnitsSL>();
        kernel.Bind<IForecastLogic>().To<ForecastLogic>();
        kernel.Bind<IForecastRepositoryAsync>().To<ForecastRepositoryAsync>();
    }
}

这是控制器

namespace ForecastApi.Controllers
{
  public class ForecastController : ApiController
{
    private IUnitsSL _serviceLayer { get; set; }
    private readonly IForecastLogic _forecastLogic;
    public ForecastController(IForecastLogic forecastLogic)
    {
        _forecastLogic = forecastLogic;
        _serviceLayer = new UnitsSL();
    }
[Route("projection")]
    [HttpPost]
    public async Task<IHttpActionResult> GetDemandForecast([FromBody] 
ProjectionRequestModel model)
    {
        var retVal = await _forecastLogic.GetDemandForecastData(model);
        return Ok(retVal);
    }
}

通过Postman测试时错误消息的确切措辞是：尝试创建“ForecastController”类型的控制器时发生错误。确保控制器具有无参数的公共构造函数。“

如果有帮助，我正在模拟我的业务调用单元测试，他们正在使用Ninject库和Moq。它似乎是失败的构造函数。

TIA

Answer 1

无论出于何种原因，完全卸载Ninject并重新安装它（这是版本3.3）解决了这个问题。如果其他人有类似问题，请留在此处。我最初安装了

Ninject
Ninject.Web.Common
Ninject.Web.Common.WebHost
Ninject.Web.WebApi
Ninject.Web.WebApi.WebHost

当我卸载所有这些软件包，然后再次重新安装它们v3.3时，NinjectWebCommon.cs文件被添加并且一切正常。我只能假设当我推出自己的公共文件以弥补Ninject没有安装它时，有些东西丢失了。

无参数控制器的Ninject WebApi错误

1 个答案: