System.TypeLoadException 与实体框架 6

Question

在 IIS 中对我的网站进行 deploid 并尝试在浏览器中查看该页面后，我遇到了以下错误。

无法从 程序集“DienstbulletinApp”。描述：未处理的异常 在执行当前 Web 请求期间发生。请 查看堆栈跟踪以获取有关错误和位置的更多信息 它起源于代码。

异常详细信息：System.TypeLoadException：无法加载类型 来自程序集的“DienstbulletinApp.DienstbulletinContext” 'DienstbulletinApp'。

当我在 Visual Studio 2019 中运行我的应用程序时，我没有出现此错误。 我已经从我的 webconfig 文件中删除了上下文，但似乎没有任何解决方案

 <contexts>
      <context type="DienstbulletinApp.DAL.DienstbulletinAppContext, DienstbulletinApp, Version=1.0.0.0, Culture=neutral">
        <databaseInitializer type="DienstbulletinApp.DAL.DienstbulletinAppInitializer, DienstbulletinApp, Version=1.0.0.0, Culture=neutral" />
      </context>
    </contexts>

DienstbulletinContext：

 public class DienstbulletinAppContext : DbContext
    {
        public DienstbulletinAppContext() : base("name=DienstbulletinDBConnectionString")
        {
            Database.SetInitializer(new DienstbulletinAppInitializer());

        }
        public DbSet<Dienstbulletin> Dienstbulletins { get; set; }
        public DbSet<Voertuig> Voertuigen { get; set; }
        public DbSet<Opdracht> Opdrachts { get; set; }
        public DbSet<DienstbulletinDetail> DienstbulletinDetails { get; set; }
        public DbSet<Locatie> Locaties { get; set; }
        public DbSet<Gebruiker> Gebruikers { get; set; }
        public DbSet<Persoon> Personen { get; set; }
        public DbSet<OpdrachtType> OpdrachtTypes { get; set; }
        public DbSet<Aandachtspunt> Aandachtspunten { get; set; }
        public DbSet<Gsm> Gsms { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Persoon>().ToTable("t_Persoon");
            modelBuilder.Entity<Voertuig>().ToTable("t_Voertuig");
            modelBuilder.Entity<Gebruiker>().ToTable("t_Gebruiker");
            modelBuilder.Entity<OpdrachtType>().ToTable("t_OpdrachtType");
            modelBuilder.Entity<Opdracht>().ToTable("t_Opdracht");
            modelBuilder.Entity<Dienstbulletin>().ToTable("t_Dienstbulletin");
            modelBuilder.Entity<DienstbulletinDetail>().ToTable("t_DienstbulletinDetail");
            modelBuilder.Entity<Locatie>().ToTable("t_Locatie");
            modelBuilder.Entity<Aandachtspunt>().ToTable("t_Aandachtspunt");
            modelBuilder.Entity<Gsm>().ToTable("t_Gsm");

            modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
        }
    }

我正在使用 .Net Framework 版本 4.0.30319 和 ASP.NET 4.7.3535.0

我知道解决方案中必须引用所有 DLL，但出现错误的文件是我自己的应用程序类。

这是完整的错误：

[TypeLoadException：无法从程序集“DienstbulletinApp”加载类型“DienstbulletinApp.DienstbulletinAppContext”。] System.RuntimeTypeHandle.GetTypeByName（字符串名称，布尔 throwOnError，布尔 ignoreCase，布尔反射，StackCrawlMarkHandle stackMark，IntPtr pPrivHostBinder，布尔 loadTypeFromPartialName，ObjectHandleOnStack 类型）+0 System.RuntimeTypeHandle.GetTypeByName（字符串名称，布尔 throwOnError，布尔 ignoreCase，布尔反射，StackCrawlMark 和 stackMark，IntPtr pPrivHostBinder，布尔 loadTypeFromPartialName）+95 System.Type.GetType(String typeName, Boolean throwOnError) +63 System.Data.Entity.Internal.InitializerConfig.TryGetInitializer(Type requiredContextType, String contextTypeName, String initializerTypeName, Boolean isDisabled, Func1 initializerArgs, Func3 exceptionMessage) +46 [InvalidOperationException：无法为应用程序配置中指定的 DbContext 类型“DienstbulletinApp.DienstbulletinAppContext，DienstbulletinApp”设置“DienstbulletinApp.DienstbulletinAppInitializer，DienstbulletinApp”类型的数据库初始化程序。条目的格式应为“key="DatabaseInitializerForType MyNamespace.MyDbContextClass, MyAssembly" value="MyNamespace.MyInitializerClass, MyAssembly"' 或 'key="DatabaseInitializerForType MyNamespace.MyDbContextClass, MyAssembly" value="Disabled"'。还要验证数据库初始值设定项构造函数的每个参数是否存在“DatabaseInitializerArgumentForType”条目。有关详细信息，请参阅内部异常。考虑使用配置部分来设置数据库初始化器（http://go.microsoft.com/fwlink/?LinkID=237468).] System.Data.Entity.Internal.InitializerConfig.TryGetInitializer(Type requiredContextType, String contextTypeName, String initializerTypeName, Boolean isDisabled, Func1 initializerArgs, Func3 exceptionMessage) +327 System.Data.Entity.Internal.InitializerConfig.TryGetInitializerFromLegacyConfig（类型 contextType）+644 System.Data.Entity.Internal.InitializerConfig.TryGetInitializer(Type contextType) +39 System.Data.Entity.Infrastructure.DependencyResolution.AppConfigDependencyResolver.GetServiceFactory（类型类型，字符串名称）+513 System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func2 valueFactory) +87 System.Data.Entity.Infrastructure.DependencyResolution.AppConfigDependencyResolver.GetService（类型类型，对象键）+187 System.Linq.WhereSelectArrayIterator2.MoveNext() +78 System.Linq.Enumerable.FirstOrDefault(IEnumerable1 source, Func2 predicate) +115 System.Data.Entity.Infrastructure.DependencyResolution.CompositeResolver2.GetService(Type type, Object key) +41 System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +159 System.Data.Entity.Internal.RetryAction1.PerformAction(TInput input) +171 System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action1 动作）+269 System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +20 System.Data.Entity.Internal.Linq.InternalSet1.Initialize() +69 System.Data.Entity.Internal.Linq.InternalSet1.get_InternalContext() +21 System.Data.Entity.Infrastructure.DbQuery1.System.Linq.IQueryable.get_Provider() +59 System.Linq.Queryable.FirstOrDefault(IQueryable1 源，Expression1 predicate) +61 DienstbulletinApp.Controllers.GebruikerController.Login() in D:\Plastic\Dienstbulletin\Dienstbulletin\Controllers\GebruikerController.cs:24 lambda_method(Closure , ControllerBase , Object[] ) +87 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 参数）+35 System.Web.Mvc.Async.c.b__9_0(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +39 System.Web.Mvc.Async.WrappedAsyncResult2.CallEndDelegate(IAsyncResult asyncResult) +70 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +42 System.Web.Mvc.Async.<>c__DisplayClass11_0.<InvokeActionMethodFilterAsynchronouslyRecursive>b__0() +80 System.Web.Mvc.Async.<>c__DisplayClass11_2.<InvokeActionMethodFilterAsynchronouslyRecursive>b__2() +387 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +42 System.Web.Mvc.Async.<>c__DisplayClass3_6.<BeginInvokeAction>b__4() +50 System.Web.Mvc.Async.<>c__DisplayClass3_1.<BeginInvokeAction>b__1(IAsyncResult asyncResult) +188 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38 System.Web.Mvc.<>c.<BeginExecuteCore>b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) +26 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +68 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +39 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38 System.Web.Mvc.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) +40 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +68 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +602 System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep 步骤) +195 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +128

Answer 1

发现从上下文中删除版本和文化=中性的错误解决了问题：

<contexts>
  <context type="DienstbulletinApp.DAL.DienstbulletinAppContext, DienstbulletinApp">
    <databaseInitializer type="DienstbulletinApp.DAL.DienstbulletinAppInitializer, DienstbulletinApp" />
  </context>
</contexts>