3) but in installation there are no machine level option. I put Oracle.DataAccess and Oracle.Web in to gac manually and add DbProviderFactories to machine.config.But I got still this error.
Is someone try this odac version with iis server
Could not load file or assembly 'Oracle.DataAccess, PublicKeyToken=89b483f429c47342' or one of its dependencies
<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>
I add dependdentAssembly to my web.config and copy Oracle.DataAccess.dll under bin folder,and it worked