Is it possible to get ref cursor from oracle stored procedure by using DAAB from Microsoft Enterprise Library 4.1?
Yes, surely you can.
PROCEDURE load_all (
p_row_start IN number,
p_page_size IN number,
cur_out OUT sys_refcursor
) AS
...
And on the C# side:
DbCommand cmd = db.GetStoredProcCommand("my_package.load_all", paramValues))
IDataReader r = db.ExecuteReader(cmd);
...
RefCursor param supposed to be named "cur_out".