for the past few years I have been using the Unmanaged driver for Oracle, the 32bit Version=4.121.2.0 from October 2015
Now I am trying to upgrade to use the new Oracle client and use the 64bit Version=4.122.18.3
When I try to connect to the database I get an error that seems to not be handled inside the Oracle assembly, and this makes it very hard to determine what the problem is.
I then tried to use the previous version instead Version=4.122.1.0 with x64 and I also get the same Error.
Any Ideas how to get this working or determine what the problem is will be much appreciated.
Error: Object reference not set to an instance of an object
StackTrace:
at Oracle.DataAccess.Client.OracleException.get_Number()
at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure, Boolean bCheck, Int32 isRecoverable, OracleLogicalTransaction m_OracleLogicalTransaction)
at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, Object src, OracleLogicalTransaction m_oracleLogicalTransaction)
at Oracle.DataAccess.Client.OracleConnectionOCP.Open(OracleConnection con)
at Oracle.DataAccess.Client.OracleConnection.Open()
at Oracle.DataAccess.EntityFramework.EFOracleProviderServices.GetDbProviderManifestToken(DbConnection connection)
at System.Data.Entity.Core.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection)
at System.Data.Entity.Utilities.DbProviderServicesExtensions.GetProviderManifestTokenChecked(DbProviderServices providerServices, DbConnection connection)
at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
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.ExecuteSqlCommand(TransactionalBehavior transactionalBehavior, String sql, Object[] parameters)
I have the following config oracle related config setup in my project:
<system.data>
<DbProviderFactories>
<add name="ODP.NET, Unmanaged Driver" invariant="Oracle.DataAccess.Client" description="Oracle Data Provider for .NET, Unmanaged Driver" type="Oracle.DataAccess.Client.OracleClientFactory, Oracle.DataAccess, Version=4.122.18.3, Culture=neutral, PublicKeyToken=89b483f429c47342" />
</DbProviderFactories>
</system.data>
<entityFramework codeConfigurationType="ProFemOnline.Data.Old.ProFemDbModelOldConfiguration, ProFemOnline.Data.Old">
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="Oracle.DataAccess.Client" type="Oracle.DataAccess.EntityFramework.EFOracleProviderServices, Oracle.DataAccess.EntityFramework, Version=6.122.18.3, Culture=neutral, PublicKeyToken=89b483f429c47342" />
</providers>
</entityFramework>
Proabaly a late reply, but I got same issue
at Oracle.DataAccess.Client.OracleException.get_Number()
and fixed by :
copying the oraons.dll from oracle_home to oracle_home\bin folder
e.g. from
"C:\oracle\odac\oraons.dll"
to
"C:\oracle\odac\bin\oraons.dll"
if you have both oracle client and ODAC installed then copy from ODAC home to ODAC\bin folder