entity-framework - 使用 Entity Framework 电动工具生成 View 时未找到方法异常

Question

我正在处理一个包含几个项目的解决方案。一个处理我们的数据库上下文。使用 Entity Framework 6 和 Power Tools Beta 4，我右键单击 dbContext.cs 文件并选择“生成 View ”。我收到以下错误:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.MissingMethodException: Method not found: 'System.Data.Entity.Core.Metadata.Edm.EdmModel System.Data.Entity.Infrastructure.DbModel.get_StoreModel()'.
   at CodeFirstStoreFunctions.FunctionsConvention.Apply(EntityContainer item, DbModel model)
   at System.Data.Entity.ModelConfiguration.Configuration.ConventionsConfiguration.ModelConventionDispatcher.Dispatch[T](T item)
   at System.Data.Entity.ModelConfiguration.Configuration.ConventionsConfiguration.ModelConventionDispatcher.VisitEdmEntityContainer(EntityContainer item)
   at System.Data.Entity.Edm.EdmModelVisitor.VisitCollection[T](IEnumerable`1 collection, Action`1 visitMethod)
   at System.Data.Entity.Edm.EdmModelVisitor.VisitEntityContainers(IEnumerable`1 entityContainers)
   at System.Data.Entity.Edm.EdmModelVisitor.VisitEdmModel(EdmModel item)
   at System.Data.Entity.ModelConfiguration.Configuration.ConventionsConfiguration.ModelConventionDispatcher.VisitEdmModel(EdmModel item)
   at System.Data.Entity.ModelConfiguration.Configuration.ConventionsConfiguration.ModelConventionDispatcher.Dispatch()
   at System.Data.Entity.ModelConfiguration.Configuration.ConventionsConfiguration.ApplyStoreModel(DbModel model)
   at System.Data.Entity.DbModelBuilder.Build(DbProviderManifest providerManifest, DbProviderInfo providerInfo)
   at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
   at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
   at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
   at System.Data.Entity.Internal.LazyInternalContext.get_CodeFirstModel()
   at System.Data.Entity.Infrastructure.EdmxWriter.WriteEdmx(DbContext context, XmlWriter writer)
   --- 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 System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams)
   at Microsoft.DbContextPackage.Handlers.ViewContextHandler.ViewContext(MenuCommand menuCommand, Object context, Type systemContextType)

知道会发生什么吗？

Answer 1

我最近在使用相同版本的 EF Power Tools 时发生了这种情况，但在我重新启动系统并在 Visual Studio 中为解决方案进行干净构建后，问题就消失了。

我在其他论坛看到这个异常在其他扩展、工具和库中引发，通常是由仍然存在的旧版本库引起的，所以我猜 clean build 通过删除旧的编译来修复我拥有 DbContext 派生类并生成新类的库。