Home/ Questions/Q 874691
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-15T11:08:42+00:00

I have .NET 3.5 application wrote in C# using NHibernate. Before I has OracleClientDriver

  • 0

I have .NET 3.5 application wrote in C# using NHibernate.
Before I has OracleClientDriver in connection.driver_class property, that say that I use System.Data.Oracle and all works fine, but for some reasons now I need using ODP, so I changed this property to: NHibernate.Driver.OracleDataClientDriver.
When I run my code I get following error during Session Factory creation:

Unable to cast object of type 'Oracle.DataAccess.Client.OracleConnection' to type 'System.Data.Common.DbConnection'

After short searching in Inernet I found solution: to add:

<property name="hbm2ddl.keywords">none</property>

So now NHibernate successfully build Session Factory but fall in session.Flush() with following error: 

System.ArgumentException: Value does not fall within the expected range
at Oracle.DataAccess.Client.OracleParameter.set_DbType(DbType value)
at NHibernate.Driver.DriverBase.InitializeParameter(IDbDataParameter dbParam, String name, SqlTypes sqlType)

Any ideas?
Thank you for ahead.
But this give me following

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I get it working!!!

    I win!
    So what I did before:
    I get Oracle.DataAccess.dll from Oracle Client bin directory and referenced it from my project assembly. When I run NHibernate Configure() function I get first error. When I removed the reference I get error that says that I need to use qalifyAssembly element in app.config for reference GAC Oracle.DataAccess.dll.

    So what I did to resolve it:
    I went to GAC and compare versions of Oracle.DataAccess dlls there with one I referenced before. It was: version of that that I recently referenced was: 10.x.x.x and version of dll in GAC (actualy there were number of DataAccess dlls) was 2.x.x.x. Here:
    http://tiredblogger.wordpress.com/2008/ … s-library/
    I found error similar to my, and I added this code

    <runtime>
       <assemblyBinding xmlns=“urn:schemas-microsoft-com:asm.v1“>
              <qualifyAssembly partialName=“Oracle.DataAccess“
                     fullName=“Oracle.DataAccess,
                            Version=2.111.6.20,
                            Culture=neutral,
                            PublicKeyToken=89b483f429c47342“ />
       </assemblyBinding>
</runtime>

    to app.config like described in above and refernenced this dll. I don’t know why I need to do both, but only so it works.

    • 0