無法加載實體框架提供程序類型？ - Entity Framework Provider type could not be loaded?

問題：

I am trying to run my tests on TeamCity which is currently installed on my machine.我正在嘗試在當前安裝在我的機器上的 TeamCity 上運行我的測試。

System.InvalidOperationException : System.InvalidOperationException ：

The Entity Framework provider type ' System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer , Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' for the ' System.Data.SqlClient ' ADO.NET provider could not be loaded. “ System.Data.SqlClient ”ADO.NET 提供程序的實體框架提供程序類型“ System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer , Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'加載。 Make sure the provider assembly is available to the running application.確保提供程序程序集可用於正在運行的應用程序。

See http://go.microsoft.com/fwlink/?LinkId=260882 for more information..有關詳細信息，請參閱http://go.microsoft.com/fwlink/?LinkId=260882 。

I have no reference to System.Data.Entity in any of my projects as was suggested on codeplex for upgrading to EF6.我在我的任何項目中都沒有提到System.Data.Entity ，正如 codeplex 上建議的那樣，以升級到 EF6。

So, I am not sure why am I getting this exception.所以，我不確定爲什麼我會收到這個例外。 I do not get any such exception when I run the tests from VS.當我從 VS 運行測試時，我沒有遇到任何此類異常。

I did try to set CopyLocal to false then again to true.. but that does not seem to work either.我確實嘗試將 CopyLocal 設置爲 false 然後再次設置爲 true .. 但這似乎也不起作用。

Update更新

My app.config has the following .我的 app.config 有以下內容。 Does this cause some behavior that I don't understand ?這是否會導致一些我不明白的行爲？

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
  </configSections>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
  </entityFramework>
</configuration>

I get the following stacktrace in teamcity .我在 teamcity 中得到以下堆棧跟蹤。

[MSTest] IntegrationTests.CrudTest+QuestionTest.Create
[03:59:11][IntegrationTests.CrudTest+QuestionTest.Create] Initialization method IntegrationTests.CrudTest+QuestionTest.Initialize threw exception. System.InvalidOperationException: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' for the 'System.Data.SqlClient' ADO.NET provider could not be loaded. Make sure the provider assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information..
[03:59:11]
[IntegrationTests.CrudTest+QuestionTest.Create]     at System.Data.Entity.Config.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName)
   at System.Data.Entity.Config.ProviderServicesFactory.GetInstanceByConvention(String providerInvariantName)
   at System.Data.Entity.Config.DefaultProviderServicesResolver.GetService(Type type, Object key)
   at System.Data.Entity.Config.CachingDependencyResolver.<>c__DisplayClass1.<GetService>b__0(Tuple`2 k)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at System.Data.Entity.Config.CachingDependencyResolver.GetService(Type type, Object key)
   at System.Data.Entity.Config.ResolverChain.<>c__DisplayClass3.<GetService>b__0(IDbDependencyResolver r)
   at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at System.Data.Entity.Config.ResolverChain.GetService(Type type, Object key)
   at System.Data.Entity.Config.RootDependencyResolver.GetService(Type type, Object key)
   at System.Data.Entity.Config.ResolverChain.<>c__DisplayClass3.<GetService>b__0(IDbDependencyResolver r)
   at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at System.Data.Entity.Config.ResolverChain.GetService(Type type, Object key)
   at System.Data.Entity.Config.CompositeResolver`2.GetService(Type type, Object key)
   at System.Data.Entity.Config.IDbDependencyResolverExtensions.GetService[T](IDbDependencyResolver resolver, Object key)
   at System.Data.Entity.Config.InternalConfiguration.GetService[TService](Object key)
   at System.Data.Entity.Config.DbConfiguration.GetService[TService](Object key)
   at System.Data.Entity.Utilities.DbProviderFactoryExtensions.GetProviderServices(DbProviderFactory factory)
   at System.Data.Entity.Infrastructure.DefaultManifestTokenService.GetProviderManifestToken(DbConnection connection)
   at System.Data.Entity.Utilities.DbConnectionExtensions.GetProviderInfo(DbConnection connection, DbProviderManifest& providerManifest)
   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.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.ActOnSet(Action action, EntityState newState, Object entity, String methodName)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Add(Object entity)
   at System.Data.Entity.DbSet`1.Add(TEntity entity)
   at EFRepository.Infrastructure.EFRepository`1.Add(T item) in c:\TeamCity\buildAgent\work\da2ea4e72c0e77f0\Repository\Infrastructure\EFRepository.cs:line 22
   at IntegrationTests.CrudTest.Initialize() in c:\TeamCity\buildAgent\work\da2ea4e72c0e77f0\IntegrationTests\CrudTest.cs:line 34

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解決方案：

參考一： https://en.stackoom.com/question/wsfp
參考二： https://stackoom.com/question/wsfp