我想在Oracle SQL中使用Entity Framework中的Model First工作流。我可以使用Create Controller在db中创建新元素，但是当我想显示它时，我得到了一个不太详细的TTC错误消息：

TTC Error
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Exception: TTC Error

Source Error: 

Line 18:         public ActionResult Index()
Line 19:         {
Line 20:             return View(db.VALLALAT.ToList());
Line 21:         }
Line 22: 

Source File: ...\Controllers\VallalatController.cs    Line: 20

字符串
我得到这个错误与每个模型，得到一个数据在SQL表

[Exception: TTC Error]
   OracleInternal.TTC.TTCExecuteSql.ReceiveExecuteResponse(Accessor[]& defineAccessors, Accessor[] bindAccessors, Boolean bHasReturningParams, SQLMetaData& sqlMetaData, SqlStatementType statementType, Int64 noOfRowsFetchedLastTime, Int32 noOfRowsToFetch, Int32& noOfRowsFetched, Int64& queryId, Int32 longFetchSize, Int64 initialLOBFetchSize, Int64[] scnFromExecution, Boolean bAllInputBinds, Int32 arrayBindCount, DataUnmarshaller& dataUnmarshaller, MarshalBindParameterValueHelper& marshalBindParamsHelper, Int64[]& rowsAffectedByArrayBind, Boolean bDefineDone, Boolean& bMoreThanOneRowAffectedByDmlWithRetClause, List`1& implicitRSList, Boolean bLOBArrayFetchRequired) +3350
   OracleInternal.ServiceObjects.OracleDataReaderImpl.FetchMoreRows(Int32 noOfRowsToFetch, Boolean fillReader, Boolean returnPSTypes) +1511
   Oracle.ManagedDataAccess.Client.OracleDataReader.Read() +1365
   System.Data.Entity.Core.Common.Internal.Materialization.Shaper`1.StoreRead() +36

[EntityCommandExecutionException: An error occurred while reading from the store provider's data reader. See the inner exception for details.]
   System.Data.Entity.Core.Common.Internal.Materialization.Shaper`1.HandleReaderException(Exception e) +145
   System.Data.Entity.Core.Common.Internal.Materialization.Shaper`1.StoreRead() +49
   System.Data.Entity.Core.Common.Internal.Materialization.SimpleEnumerator.MoveNext() +41
   System.Data.Entity.Internal.LazyEnumerator`1.MoveNext() +112
   System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +387
   System.Linq.Enumerable.ToList(IEnumerable`1 source) +58

型
我的环境：

• Oracle数据库10 g企业版10.2.0.2.0 - 64 bi
• 实体框架6.0
• Oracle.ManagedDataAccess和EntityFramework 18.3