“Server Error in '/' Application. Sequence contains no elements” after refactoring namespace

问题

I'm using MVC 4 and Ninject 3 with NinjectWebCommon in the App_Start folder.

And my Global.asax.cs is MvcApplication : HttpApplication

I'm getting the error below because the Ninject is starting twice - Why?

Server Error in '/' Application.

Sequence contains no elements

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: Sequence contains no elements

Source Error: 


Line 50:             kernelInstance = createKernelCallback();
Line 51: 
Line 52:             kernelInstance.Components.GetAll<INinjectHttpApplicationPlugin>().Map(c => c.Start());
Line 53:             kernelInstance.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();
Line 54:             kernelInstance.Inject(this);

Source File: c:\Projects\Ninject\Ninject.Web.Common\src\Ninject.Web.Common\Bootstrapper.cs    Line: 52 

Stack Trace: 


[InvalidOperationException: Sequence contains no elements]
   System.Linq.Enumerable.Single(IEnumerable`1 source) +315
   Ninject.Web.Mvc.NinjectMvcHttpApplicationPlugin.Start() in c:\Projects\Ninject\ninject.web.mvc\mvc3\src\Ninject.Web.Mvc\NinjectMvcHttpApplicationPlugin.cs:53
   Ninject.Web.Common.Bootstrapper.<Initialize>b__0(INinjectHttpApplicationPlugin c) in c:\Projects\Ninject\Ninject.Web.Common\src\Ninject.Web.Common\Bootstrapper.cs:52
   Ninject.Infrastructure.Language.ExtensionsForIEnumerableOfT.Map(IEnumerable`1 series, Action`1 action) in c:\Projects\Ninject\ninject\src\Ninject\Infrastructure\Language\ExtensionsForIEnumerableOfT.cs:32
   Ninject.Web.Common.Bootstrapper.Initialize(Func`1 createKernelCallback) in c:\Projects\Ninject\Ninject.Web.Common\src\Ninject.Web.Common\Bootstrapper.cs:52
   Company.App.App_Start.NinjectWebCommon.Start() in c:\Development\Company\trunk\src\App\App_Start\NinjectWebCommon.cs:29

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
   System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +192
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +108
   System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) +19
   WebActivator.BaseActivationMethodAttribute.InvokeMethod() +236
   WebActivator.ActivationManager.RunActivationMethods() +534
   WebActivator.ActivationManager.RunPreStartMethods() +41
   WebActivator.ActivationManager.Run() +64

[InvalidOperationException: The pre-application start initialization method Run on type WebActivator.ActivationManager threw an exception with the following error message: Exception has been thrown by the target of an invocation..]
   System.Web.Compilation.BuildManager.InvokePreStartInitMethodsCore(ICollection`1 methods, Func`1 setHostingEnvironmentCultures) +550
   System.Web.Compilation.BuildManager.InvokePreStartInitMethods(ICollection`1 methods) +132
   System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath) +90
   System.Web.Compilation.BuildManager.ExecutePreAppStart() +135
   System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +516

[HttpException (0x80004005): The pre-application start initialization method Run on type WebActivator.ActivationManager threw an exception with the following error message: Exception has been thrown by the target of an invocation..]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9874568
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +101
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +254

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.18044

回答1:

This was caused when I refactored the namespaces and binary name.

This meant that a old copy of the dll with the old name was still in the bin folder.

Which meant both dll's were being activated at start up.

A Clean did not remove it, so I deleted manually and the problem went away.

回答2:

I came across this issue and spent a couple hours trying various recommendations on the internet. The thing which fixed it in the end was to check for circular references across namespaces in my project. Have a look at your .csproj files and check all the references are correct

回答3:

For me i'd accidentally installed ninject into a non web project, removing it from my data project solved the issue for me.

来源：https://stackoverflow.com/questions/18993001/server-error-in-application-sequence-contains-no-elements-after-refactori

标签

asp.net-mvc

asp.net-mvc-4

ninject