c# - 无法加载类型 'System.IdentityModel.Tokens.JwtSecurityToken'

Question

我有两个库。一个消耗另一个，消耗库本身由 Web 应用程序使用。 Web 应用程序返回以下错误，而实例化类型的代码(掺杂 JWT 签名验证)在两个库的单元测试中成功执行。库、应用程序是目标框架 .NET 4.5.2 我验证了 Web 应用程序的 .csproj 文件具有有效引用

<Reference Include="System.IdentityModel.Tokens.Jwt, Version=5.1.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">      <HintPath>..\packages\System.IdentityModel.Tokens.Jwt.5.1.4\lib\net451\System.IdentityModel.Tokens.Jwt.dll</HintPath>
 </Reference>

我在 GAC 中找不到要删除的程序集

C:\Program Files (x86)\Microsoft Visual Studio 11.0>gacutil /u System.IdentityMo
del.Tokens.Jwt
Microsoft (R) .NET Global Assembly Cache Utility.  Version 4.0.30319.17929
Copyright (c) Microsoft Corporation.  All rights reserved.

No assemblies found matching: System.IdentityModel.Tokens.Jwt
Number of assemblies uninstalled = 0
Number of failures = 0

我尝试过清理、重建、重启、删除/bin 和/lib 并重建，但我不知所措。就个人而言，这可能不是 System.IdentityModel.Tokens.Jwt 本身，而是我需要的故障排除指南，例如类型加载错误。我已经重新安装了 .Tokens 包，实际上是所有包:

nuget install packages.config

我仍然遇到错误，不是在构建时，而是在执行时:

Server Error in '/' Application.

Could not load type 'System.IdentityModel.Tokens.JwtSecurityToken' from assembly 'System.IdentityModel.Tokens.Jwt, Version=5.1.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

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.TypeLoadException: Could not load type 'System.IdentityModel.Tokens.JwtSecurityToken' from assembly 'System.IdentityModel.Tokens.Jwt, Version=5.1.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

Source Error: 


Line 12:     protected void Application_Start(object sender, EventArgs e)
Line 13:     {
Line 14:       GlobalConfiguration.Configure(WebApiConfig.Register);
Line 15:     }
Line 16: 

Source File: C:\Dev\Git\Connect-Applications\ControllerlessApp\src\Connect.Rest.MainApp\Global.asax.cs    Line: 14 

Stack Trace: 


[TypeLoadException: Could not load type 'System.IdentityModel.Tokens.JwtSecurityToken' from assembly 'System.IdentityModel.Tokens.Jwt, Version=5.1.4.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.]
   System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes) +0
   System.Reflection.RuntimeAssembly.GetExportedTypes() +31
   Plex.Web.UI.ServiceResolverDefaults..ctor() +842

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +138
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +105
   System.Activator.CreateInstance(Type type) +12
   Plex.Activation.AssemblyDefaultRegistrationConvention.Process(Type type, Registry registry) +118
   StructureMap.StringExtensions.Each(IEnumerable`1 enumerable, Action`1 action) in c:\BuildAgent\work\767273992e840853\src\StructureMap\Extensions.cs:10
   StructureMap.StringExtensions.Each(IEnumerable`1 enumerable, Action`1 action) in c:\BuildAgent\work\767273992e840853\src\StructureMap\Extensions.cs:10
   StructureMap.Graph.AssemblyScanner.ScanForAll(PluginGraph pluginGraph) in c:\BuildAgent\work\767273992e840853\src\StructureMap\Graph\AssemblyScanner.cs:248
   StructureMap.Graph.PluginGraph.Seal() in c:\BuildAgent\work\767273992e840853\src\StructureMap\Graph\PluginGraph.cs:121
   StructureMap.PluginGraphBuilder.Build() in c:\BuildAgent\work\767273992e840853\src\StructureMap\PluginGraphBuilder.cs:72
   StructureMap.Container..ctor(Action`1 action) in c:\BuildAgent\work\767273992e840853\src\StructureMap\Container.cs:25
   Plex.Activation.ServiceResolverBuilder.Initialize(ApplicationContext context) +288
   Connect.Rest.Framework.Hosting2.Infrastructure.AppDomainSharedServices.get_ServiceResolver() +1373
   Connect.Rest.Framework.Hosting2.WebApiConfig.Register(HttpConfiguration config) +80
   System.Web.Http.GlobalConfiguration.Configure(Action`1 configurationCallback) +63
   Connect.Rest.MainApp.WebApiApplication.Application_Start(Object sender, EventArgs e) in C:\Dev\Git\Connect-Applications\ControllerlessApp\src\Connect.Rest.MainApp\Global.asax.cs:14

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +544
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +186
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +402
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +343

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +579
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +112
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +716

Answer 1

我通过将包 System.IdentityModel.Tokens.Jwt 降级到 4.0 解决了这个问题

GitHub 上有个问题 https://github.com/aspnet/AspNetKatana/issues/76