C# 实体框架ASP.NET MVC（有时）与DbContext.Set和其他地方有关的问题_C#_Entity Framework_Entity Framework 6_Unity Container_Asp.net Mvc 5.2

C# 实体框架ASP.NET MVC（有时）与DbContext.Set和其他地方有关的问题

c# entity-framework

C# 实体框架ASP.NET MVC（有时）与DbContext.Set和其他地方有关的问题,c#,entity-framework,entity-framework-6,unity-container,asp.net-mvc-5.2,C#,Entity Framework,Entity Framework 6,Unity Container,Asp.net Mvc 5.2,将ASP.NET与实体框架和Unity容器结合使用时，我遇到了一个奇怪的问题只有在应用程序运行了几个小时到几天之后，才会出现此问题。在这种情况发生后，通过重新启动IIS，在同一时间段内，它会再次临时修复有时，当尝试使用unity容器注入控制器时，该问题会出现异常例如： public class PersonController { private readonly ICrudService<Person> personCrudservice; public

将ASP.NET与实体框架和Unity容器结合使用时，我遇到了一个奇怪的问题

只有在应用程序运行了几个小时到几天之后，才会出现此问题。在这种情况发生后，通过重新启动IIS，在同一时间段内，它会再次临时修复

有时，当尝试使用unity容器注入控制器时，该问题会出现异常

例如：

public class PersonController
{
     private readonly ICrudService<Person> personCrudservice;

     public PersonController(ICrudService<Person> personCrudservice) 
     {
         this.personCrudservice = personCrudservice;
     }
}

UnityConfig.cs

我已经有这个问题好几个星期了，我尝试了不同的生命周期管理器，还降级了Unity容器/实体框架，但都没有用

Stacktrace:已添加具有相同密钥的项

   at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
   at System.Data.Entity.Internal.InternalContext.Set[TEntity]()
   at System.Data.Entity.DbContext.Set[TEntity]()
   at Multitask.COMPANYNAME.DataAccess.EntityFramework.DataContext.CreateRepositoryFor[T]() in C:\Source\Workspaces\Multitask.COMPANYNAME\Multitask.COMPANYNAME\DataAccess\DataContext.cs:line 50
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Multitask.COMPANYNAME.WebApplication.Unity.HttpContextFactoryLifetimeManager.GetValue(ILifetimeContainer container) in C:\Source\Workspaces\Multitask.COMPANYNAME\Multitask.COMPANYNAME\WebApplication\Unity\HttpContextFactoryLifetimeManager.cs:line 60
   at Unity.Strategies.LifetimeStrategy.PreBuildUp(BuilderContext& context)
   at Unity.UnityContainer.<>c.<.ctor>b__73_1(BuilderContext& context)
   at Unity.UnityContainer.Unity.IUnityContainer.Resolve(Type type, String name, ResolverOverride[] overrides)
   at Unity.UnityContainerExtensions.Resolve[T](IUnityContainer container, ResolverOverride[] overrides)
   at Multitask.COMPANYNAME.DataAccess.EntityFramework.DataContext.Multitask.COMPANYNAME.Service.DataAccess.ICrudServiceFactory.GenerateCrudServiceFor[T](IUnityContainer unityContainer) in C:\Source\Workspaces\Multitask.COMPANYNAME\Multitask.COMPANYNAME\DataAccess\DataContext.cs:line 131
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Multitask.COMPANYNAME.WebApplication.Unity.HttpContextFactoryLifetimeManager.GetValue(ILifetimeContainer container) in C:\Source\Workspaces\Multitask.COMPANYNAME\Multitask.COMPANYNAME\WebApplication\Unity\HttpContextFactoryLifetimeManager.cs:line 70
   at Unity.Strategies.LifetimeStrategy.PreBuildUp(BuilderContext& context)
   at Unity.UnityContainer.<>c.<.ctor>b__73_2(BuilderStrategy[] chain, BuilderContext& context)
   at Unity.Builder.BuilderContext.Resolve(Type type, String name, InternalRegistration registration)
   at Unity.Builder.BuilderContext.Resolve(Type type, String name)
   at Unity.Builder.BuilderContext.Resolve(ParameterInfo parameter, Object value)
   at Unity.Processors.ConstructorProcessor.<>c__DisplayClass16_0.<GetResolverDelegate>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Strategies.BuildPlanStrategy.PreBuildUp(BuilderContext& context)
   at Unity.UnityContainer.<>c.<.ctor>b__73_2(BuilderStrategy[] chain, BuilderContext& context)
   at Unity.Builder.BuilderContext.Resolve(Type type, String name, InternalRegistration registration)
   at Unity.Builder.BuilderContext.Resolve(Type type, String name)
   at Unity.Builder.BuilderContext.Resolve(ParameterInfo parameter, Object value)
   at Unity.Processors.ConstructorProcessor.<>c__DisplayClass16_0.<GetResolverDelegate>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Strategies.BuildPlanStrategy.PreBuildUp(BuilderContext& context)
   at Unity.UnityContainer.<>c.<.ctor>b__73_1(BuilderContext& context)
   at Unity.UnityContainer.Unity.IUnityContainer.Resolve(Type type, String name, ResolverOverride[] overrides)
   at System.Web.Mvc.DefaultControllerFactory.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType)
   --- End of inner exception stack trace ---
   at System.Web.Mvc.DefaultControllerFactory.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType)
   at System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory)
   at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)````

添加一个空构造函数，如

public PersonController() {};    
//before 

public PersonController(ICrudService<Person> personCrudservice) 
{
  this.personCrudservice = personCrudservice;
};

这可能会导致Unity使用空构造函数，而不是注入ICrudService，否？能否附加StackTrace of error？请注意StackTrace中的私有信息。我已经删掉了我认为你不想看到的信息reveal@Flater谢谢你。我忘记编辑了。

   at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
   at System.Data.Entity.Internal.InternalContext.Set[TEntity]()
   at System.Data.Entity.DbContext.Set[TEntity]()
   at Multitask.COMPANYNAME.DataAccess.EntityFramework.DataContext.CreateRepositoryFor[T]() in C:\Source\Workspaces\Multitask.COMPANYNAME\Multitask.COMPANYNAME\DataAccess\DataContext.cs:line 50
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Multitask.COMPANYNAME.WebApplication.Unity.HttpContextFactoryLifetimeManager.GetValue(ILifetimeContainer container) in C:\Source\Workspaces\Multitask.COMPANYNAME\Multitask.COMPANYNAME\WebApplication\Unity\HttpContextFactoryLifetimeManager.cs:line 60
   at Unity.Strategies.LifetimeStrategy.PreBuildUp(BuilderContext& context)
   at Unity.UnityContainer.<>c.<.ctor>b__73_1(BuilderContext& context)
   at Unity.UnityContainer.Unity.IUnityContainer.Resolve(Type type, String name, ResolverOverride[] overrides)
   at Unity.UnityContainerExtensions.Resolve[T](IUnityContainer container, ResolverOverride[] overrides)
   at Multitask.COMPANYNAME.DataAccess.EntityFramework.DataContext.Multitask.COMPANYNAME.Service.DataAccess.ICrudServiceFactory.GenerateCrudServiceFor[T](IUnityContainer unityContainer) in C:\Source\Workspaces\Multitask.COMPANYNAME\Multitask.COMPANYNAME\DataAccess\DataContext.cs:line 131
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Multitask.COMPANYNAME.WebApplication.Unity.HttpContextFactoryLifetimeManager.GetValue(ILifetimeContainer container) in C:\Source\Workspaces\Multitask.COMPANYNAME\Multitask.COMPANYNAME\WebApplication\Unity\HttpContextFactoryLifetimeManager.cs:line 70
   at Unity.Strategies.LifetimeStrategy.PreBuildUp(BuilderContext& context)
   at Unity.UnityContainer.<>c.<.ctor>b__73_2(BuilderStrategy[] chain, BuilderContext& context)
   at Unity.Builder.BuilderContext.Resolve(Type type, String name, InternalRegistration registration)
   at Unity.Builder.BuilderContext.Resolve(Type type, String name)
   at Unity.Builder.BuilderContext.Resolve(ParameterInfo parameter, Object value)
   at Unity.Processors.ConstructorProcessor.<>c__DisplayClass16_0.<GetResolverDelegate>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Strategies.BuildPlanStrategy.PreBuildUp(BuilderContext& context)
   at Unity.UnityContainer.<>c.<.ctor>b__73_2(BuilderStrategy[] chain, BuilderContext& context)
   at Unity.Builder.BuilderContext.Resolve(Type type, String name, InternalRegistration registration)
   at Unity.Builder.BuilderContext.Resolve(Type type, String name)
   at Unity.Builder.BuilderContext.Resolve(ParameterInfo parameter, Object value)
   at Unity.Processors.ConstructorProcessor.<>c__DisplayClass16_0.<GetResolverDelegate>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Processors.MemberProcessor`2.<>c__DisplayClass8_0.<GetResolver>b__0(BuilderContext& c)
   at Unity.Strategies.BuildPlanStrategy.PreBuildUp(BuilderContext& context)
   at Unity.UnityContainer.<>c.<.ctor>b__73_1(BuilderContext& context)
   at Unity.UnityContainer.Unity.IUnityContainer.Resolve(Type type, String name, ResolverOverride[] overrides)
   at System.Web.Mvc.DefaultControllerFactory.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType)
   --- End of inner exception stack trace ---
   at System.Web.Mvc.DefaultControllerFactory.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType)
   at System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory)
   at System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)````

public PersonController() {};    
//before 

public PersonController(ICrudService<Person> personCrudservice) 
{
  this.personCrudservice = personCrudservice;
};