Entity Framework and windows.winmd

Question

I m developing an Windows 8 application (not Windows store app) using .Net 4 and EF. Everything is working fine until i want to add the Windows.winmd reference. I got the following exception :

System.Data.DataException occurred
  HResult=-2146233087
  Message=An exception occurred while initializing the database. See the InnerException for details.
  Source=EntityFramework
  StackTrace:
       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.Initialize()
       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.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider()
       at System.Linq.Queryable.OrderBy[TSource,TKey](IQueryable`1 source, Expression`1 keySelector)
       at Yawd.Dal.Dal.getIncludeFolders() in c:\Users\Jeff\Documents\Visual Studio 2010\Projects\Yawd.old\Yawd\Dal\Dal.cs:line 170
  InnerException: System.Data.EntityCommandCompilationException
       HResult=-2146232005
       Message=An error occurred while preparing the command definition. See the inner exception for details.
       Source=System.Data.Entity
       StackTrace:
            at System.Data.EntityClient.EntityCommandDefinition..ctor(DbProviderFactory storeProviderFactory, DbCommandTree commandTree)
            at System.Data.EntityClient.EntityProviderServices.CreateCommandDefinition(DbProviderFactory storeProviderFactory, DbCommandTree commandTree)
            at System.Data.EntityClient.EntityProviderServices.CreateDbCommandDefinition(DbProviderManifest providerManifest, DbCommandTree commandTree)
            at System.Data.Common.DbProviderServices.CreateCommandDefinition(DbCommandTree commandTree)
            at System.Data.Objects.Internal.ObjectQueryExecutionPlan.Prepare(ObjectContext context, DbQueryCommandTree tree, Type elementType, MergeOption mergeOption, Span span, ReadOnlyCollection`1 compiledQueryParameters, AliasGenerator aliasGenerator)
            at System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable`1 forMergeOption)
            at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
            at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
            at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
            at System.Data.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__1[TResult](IEnumerable`1 sequence)
            at System.Data.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot)
            at System.Data.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[S](Expression expression)
            at System.Data.Entity.Internal.Linq.DbQueryProvider.Execute[TResult](Expression expression)
            at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source)
            at System.Data.Entity.Internal.EdmMetadataRepository.QueryForModelHash(Func`2 createContext)
            at System.Data.Entity.Internal.InternalContext.QueryForModelHash()
            at System.Data.Entity.Internal.ModelCompatibilityChecker.CompatibleWithModel(InternalContext internalContext, ModelHashCalculator modelHashCalculator, Boolean throwIfNoMetadata)
            at System.Data.Entity.Internal.InternalContext.CompatibleWithModel(Boolean throwIfNoMetadata)
            at System.Data.Entity.Database.CompatibleWithModel(Boolean throwIfNoMetadata)
            at System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context)
            at System.Data.Entity.Internal.InternalContext.<>c__DisplayClass8.<PerformDatabaseInitialization>b__6()
            at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action)
       InnerException: System.IO.FileLoadException
            HResult=-2146233067
            Message=Could not load file or assembly 'Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)
            Source=mscorlib
            FileName=Windows, Version=255.255.255.255, Culture=neutral, PublicKeyToken=null, ContentType=WindowsRuntime
            FusionLog=""
            StackTrace:
                 at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
                 at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
                 at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
                 at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
                 at System.Data.Metadata.Edm.MetadataAssemblyHelper.SafeLoadReferencedAssembly(AssemblyName assemblyName)
                 at System.Data.Metadata.Edm.MetadataAssemblyHelper.<GetNonSystemReferencedAssemblies>d__0.MoveNext()
                 at System.Data.Metadata.Edm.ObjectItemCollection.ImplicitLoadViewsFromAllReferencedAssemblies(Assembly assembly)
                 at System.Data.Mapping.StorageMappingItemCollection.ViewDictionary.SerializedCollectViewsFromReferencedAssemblies(MetadataWorkspace workspace, Dictionary`2 extentMappingViews)
                 at System.Data.Mapping.StorageMappingItemCollection.ViewDictionary.SerializedGetGeneratedViews(EntityContainer container)
                 at System.Data.Common.Utils.Memoizer`2.<>c__DisplayClass2.<Evaluate>b__0()
                 at System.Data.Common.Utils.Memoizer`2.Result.GetValue()
                 at System.Data.Common.Utils.Memoizer`2.Evaluate(TArg arg)
                 at System.Data.Mapping.StorageMappingItemCollection.ViewDictionary.GetGeneratedView(EntitySetBase extent, MetadataWorkspace workspace, StorageMappingItemCollection storageMappingItemCollection)
                 at System.Data.Metadata.Edm.MetadataWorkspace.GetGeneratedView(EntitySetBase extent)
                 at System.Data.Query.PlanCompiler.PreProcessor.ExpandView(Node node, ScanTableOp scanTableOp, IsOfOp& typeFilter)
                 at System.Data.Query.PlanCompiler.PreProcessor.ProcessScanTable(Node scanTableNode, ScanTableOp scanTableOp, IsOfOp& typeFilter)
                 at System.Data.Query.PlanCompiler.PreProcessor.Visit(ScanTableOp op, Node n)
                 at System.Data.Query.InternalTrees.ScanTableOp.Accept[TResultType](BasicOpVisitorOfT`1 v, Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfT`1.VisitNode(Node n)
                 at System.Data.Query.PlanCompiler.SubqueryTrackingVisitor.VisitChildren(Node n)
                 at System.Data.Query.PlanCompiler.SubqueryTrackingVisitor.VisitRelOpDefault(RelOp op, Node n)
                 at System.Data.Query.PlanCompiler.PreProcessor.Visit(ProjectOp op, Node n)
                 at System.Data.Query.InternalTrees.ProjectOp.Accept[TResultType](BasicOpVisitorOfT`1 v, Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfT`1.VisitNode(Node n)
                 at System.Data.Query.PlanCompiler.SubqueryTrackingVisitor.VisitChildren(Node n)
                 at System.Data.Query.PlanCompiler.SubqueryTrackingVisitor.VisitRelOpDefault(RelOp op, Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfT`1.VisitSortOp(SortBaseOp op, Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfT`1.Visit(ConstrainedSortOp op, Node n)
                 at System.Data.Query.InternalTrees.ConstrainedSortOp.Accept[TResultType](BasicOpVisitorOfT`1 v, Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfT`1.VisitNode(Node n)
                 at System.Data.Query.PlanCompiler.SubqueryTrackingVisitor.VisitChildren(Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfNode.VisitDefault(Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfNode.VisitPhysicalOpDefault(PhysicalOp op, Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfT`1.Visit(PhysicalProjectOp op, Node n)
                 at System.Data.Query.InternalTrees.PhysicalProjectOp.Accept[TResultType](BasicOpVisitorOfT`1 v, Node n)
                 at System.Data.Query.InternalTrees.BasicOpVisitorOfT`1.VisitNode(Node n)
                 at System.Data.Query.PlanCompiler.PreProcessor.Process(Dictionary`2& tvfResultKeys)
                 at System.Data.Query.PlanCompiler.PreProcessor.Process(PlanCompiler planCompilerState, StructuredTypeInfo& typeInfo, Dictionary`2& tvfResultKeys)
                 at System.Data.Query.PlanCompiler.PlanCompiler.Compile(List`1& providerCommands, ColumnMap& resultColumnMap, Int32& columnCount, Set`1& entitySets)
                 at System.Data.EntityClient.EntityCommandDefinition..ctor(DbProviderFactory storeProviderFactory, DbCommandTree commandTree)
            InnerException:

If i remove the reference eveything is working fine. If i don't use EF but only Windows.winmd everything is working fine too, but i can't use both in same app.

Any clue on this ?

Thanks for your time.

Jeff

Hello, because i use EF to access my DB, and Windows.winmd to get access to the Windows 8 lockscreen. — myCollections, Oct 22 '12 at 08:40
Have you tried the answer here: http://stackoverflow.com/q/8524423/573218 — John Koerner, Oct 22 '12 at 13:08
Hello, yes i try it also in app.config but not working. BTW thanks for your help — myCollections, Oct 22 '12 at 14:08
EF should not fail like this. In this particular case it is trying to load assemblies to check whether they have pregenerated views. Loading failure should not be surfaced as it is not much different from not having views at all. I also don't know why loading the assembly fails like this but I assume it has something to do with Win8/WinRT. Can you file a bug on http://entityframework.codeplex.com/? — Pawel, Oct 22 '12 at 23:53
I filed a bug for this http://entityframework.codeplex.com/workitem/609 — Pawel, Oct 23 '12 at 00:05
One more question - what versions of Windows 8 (is it RC) and EF are you using? — Pawel, Oct 23 '12 at 18:15
Hello Pawel, I m using W8 Pro RTM with EF5 from nuget. Thanks for your time. — myCollections, Oct 24 '12 at 06:07

score 0 · Accepted Answer · edited May 23 '17 at 12:03

0

Entity Framework is trying to load all referenced assemblies to check if they contain views. winmd assemblies are not .NET assemblies (as explained here Cannot get types from .winmd file) and therefore fail to load. Having said that - EF should not fail if it encounters an assembly like that - it's a bug.

I filed a bug for this http://entityframework.codeplex.com/workitem/609

This has been fixed for EF6

edited May 23 '17 at 12:03

Community

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answered Oct 23 '12 at 00:01

Pawel

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@myCollections - thanks for the repro. This has been fixed for EF6 and should be available in todays nightly build. – Pawel Mar 11 '13 at 21:37

Entity Framework and windows.winmd

1 Answers1