Question

这是我的代码：

using (var dbcontext = new ProjectContext())
     dbcontext.table1.Find(1);

当我运行它时，我遇到了这个异常：

类型＆＃39; System.NotSupportedException＆＃39;的例外情况发生在EntityFramework.dll中但未在用户代码中处理

详细错误：

Model compatibility cannot be checked because the database does not contain model metadata. Model compatibility can only be checked for databases created using Code First or Code First Migrations.

堆栈跟踪：

at System.Data.Entity.Internal.ModelCompatibilityChecker.CompatibleWithModel(InternalContext internalContext, ModelHashCalculator modelHashCalculator, Boolean throwIfNoMetadata, DatabaseExistenceState existenceState)
   at System.Data.Entity.Internal.InternalContext.CompatibleWithModel(Boolean throwIfNoMetadata, DatabaseExistenceState existenceState)
   at System.Data.Entity.DropCreateDatabaseIfModelChanges`1.InitializeDatabase(TContext context)
   at System.Data.Entity.Internal.InternalContext.<>c__DisplayClassf`1.<CreateInitializationAction>b__e()
   at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action)
   at System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization()
   at System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c)
   at System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase()
   at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
   at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
   at System.Data.Entity.Internal.Linq.InternalSet`1.Find(Object[] keyValues)
   at System.Data.Entity.DbSet`1.Find(Object[] keyValues)
   at Journals.Repository.DataContext.SimpleMembershipInitializer..ctor() in C:\Users\Arya\Desktop\Crossover\Source\Journals.Repository\DataContext\SimpleMembershipInitializer.cs:line 12

我该如何解决这个问题？

类型＆＃39; System.NotSupportedException＆＃39;的例外情况发生在EntityFramework.dll中但未在用户代码

0 个答案: