Using a parameter in a DataTable - ORA-01008: not all variables bound

Question

Environment:
Visual Studio 2010, Windows Forms Application, Oracle Database

 I am trying to use a parameter in a DataSet.xsd DataTable.
The query and parameter work fine in Query Builder but gives an error if I try "Preview Data" or use in my application.
Error: An unhandled exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll 
Additional information: ORA-01008: not all variables bound 

For full details on the application setup / my troubleshooting so far see here:
http://www.fullstackbusinessdesign.com/forums/ORA-01008.html

Answer 1

I am using the OleDb provider for Oracle. 
The bind variable should be a question mark ? not :DEPTCODE

The bind variable :DEPTCODE would be valid for System.Data.OracleClient.

Many thanks to Prashant Kumar for this solution.
http://forums.asp.net/members/Prashant%20Kumar.aspx