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我正在用C＃，.NET Framework 4.5.1开发ASP.NET Web Api 2.2。NinjectDependencyResolver失败绑定ModelValidatorProvider
更新我Web.Api到Ninject 3.2.0后，我得到这个错误：
Error activating ModelValidatorProvider using binding from ModelValidatorProvider to NinjectDefaultModelValidatorProvider
A cyclical dependency was detected between the constructors of two services.
Activation path:
3) Injection of dependency ModelValidatorProvider into parameter defaultModelValidatorProviders of constructor of type DefaultModelValidatorProviders
2) Injection of dependency DefaultModelValidatorProviders into parameter defaultModelValidatorProviders of constructor of type NinjectDefaultModelValidatorProvider
1) Request for ModelValidatorProvider
Suggestions:
1) Ensure that you have not declared a dependency for ModelValidatorProvider on any implementations of the service.
2) Consider combining the services into a single one to remove the cycle.
3) Use property injection instead of constructor injection, and implement IInitializable
if you need initialization logic to be run after property values have been injected.
我得到的例外NinjectWebCommon：
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();
try
{
kernel.Bind<Func<IKernel>>().ToMethod(ctx =>() => new Bootstrapper().Kernel);
kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();
RegisterServices(kernel);
return kernel;
}
catch
{
kernel.Dispose();
throw;
}
}
/// <summary>
/// Load your modules or register your services here!
/// </summary>
/// <param name="kernel">The kernel.</param>
private static void RegisterServices(IKernel kernel)
{
var containerConfigurator = new NinjectConfigurator();
containerConfigurator.Configure(kernel);
}
}
NinjectDependencyResolver类：
using Ninject;
using System;
using System.Collections.Generic;
using System.Web.Http.Dependencies;
namespace Matt.SocialNetwork.Web.Common
{
public class NinjectDependencyResolver : IDependencyResolver
{
private readonly IKernel _container;
public IKernel Container
{
get { return _container; }
}
public NinjectDependencyResolver(IKernel container)
{
_container = container;
}
public object GetService(Type serviceType)
{
return _container.TryGet(serviceType);
}
public IEnumerable<object> GetServices(Type serviceType)
{
return _container.GetAll(serviceType);
}
public IDependencyScope BeginScope()
{
return this;
}
public void Dispose()
{
// noop
}
}
}
NinjectConfigurator等级：
public class NinjectConfigurator
{
public void Configure(IKernel container)
{
// Add all bindings/dependencies
AddBindings(container);
// Use the container and our NinjectDependencyResolver as
// application's resolver
var resolver = new NinjectDependencyResolver(container);
GlobalConfiguration.Configuration.DependencyResolver = resolver;
}
// Omitted for brevity.
}
奇怪的是它编译和工作完美，但更新后它不起作用。
我改变了这个public class NinjectDependencyResolver : IDependencyResolver, System.Web.Mvc.IDependencyResolver，但它仍然不起作用。
有什么想法？
UPDATE
调试我看到异常在NinjectDependencyResolver这里抛出：
public IEnumerable<object> GetServices(Type serviceType)
{
return _container.GetAll(serviceType);
}
它运行两次。第一个serviceType是IFilterProvider，第二个时间serviceType是ModelValidatorProvider，之后我得到了异常。
这些都是Ninject包，我使用：
我发现
<package id="Ninject" version="3.2.2.0" targetFramework="net45" />
<package id="Ninject.MVC5" version="3.2.1.0" targetFramework="net45" />
<package id="Ninject.Web.Common" version="3.2.2.0" targetFramework="net451" />
<package id="Ninject.Web.Common.WebHost" version="3.2.0.0" targetFramework="net45" />
<package id="Ninject.Web.WebApi" version="3.2.0.0" targetFramework="net451" />
第二次更新：
<package id="Ninject" version="3.2.2.0" targetFramework="net451" />
<package id="Ninject.MVC5" version="3.2.1.0" targetFramework="net45" />
<package id="Ninject.Web.Common" version="3.2.3.0" targetFramework="net451" />
<package id="Ninject.Web.Common.WebHost" version="3.2.3.0" targetFramework="net451" />
<package id="Ninject.Web.WebApi" version="3.2.2.0" targetFramework="net451" />
以前的版本，这些组件是问题在于此类：
public static class WebContainerManager
{
public static IKernel GetContainer()
{
var resolver = GlobalConfiguration.Configuration.DependencyResolver as NinjectDependencyResolver;
if (resolver != null)
{
return resolver.Container;
}
throw new InvalidOperationException("NinjectDependencyResolver not being used as the MVC dependency resolver");
}
public static T Get<T>()
{
return GetContainer().Get<T>();
}
}
我设置Dependency Resolver这里：
public class NinjectConfigurator
{
/// <summary>
/// Entry method used by caller to configure the given
/// container with all of this application's
/// dependencies. Also configures the container as this
/// application's dependency resolver.
/// </summary>
public void Configure(IKernel container)
{
// Add all bindings/dependencies
AddBindings(container);
// Use the container and our NinjectDependencyResolver as
// application's resolver
var resolver = new NinjectDependencyResolver(container);
GlobalConfiguration.Configuration.DependencyResolver = resolver;
}
而且我从ExceptionFilterAttribute继承的类使用WebContainerManager：
public class UnhandledExceptionFilter : ExceptionFilterAttribute
{
private readonly IExceptionLogHelper excepLogHelper;
public UnhandledExceptionFilter()
: this(WebContainerManager.Get<IExceptionLogHelper>()) {}
public UnhandledExceptionFilter(IExceptionLogHelper exceptionLogHelper)
{
this.excepLogHelper = exceptionLogHelper;
}
public override void OnException(HttpActionExecutedContext actionExecutedContext)
{
this.excepLogHelper.LogException(actionExecutedContext);
}
}
所以，如果我删除WebContainerManager我没有得到循环。
你试过卸载所有的ninject软件包并重新安装它们吗？确保你真的有最新版本？ – BatteryBackupUnit 2014-10-17 09:16:34
是的，我这样做，我得到了同样的错误。 – VansFannel 2014-10-17 09:18:42
你可以上传[mcve]（http://stackoverflow.com/help/mcve）作为视觉工作室项目在gist/github回购或类似的东西？我想刺穿它。 – BatteryBackupUnit 2014-11-10 07:18:25