DbCommand dbcmd = db.GetStoredProcCommand("getinstockbillanddetails");
            //添加参数
            db.AddInParameter(dbcmd, "instockid", DbType.Int32, int.Parse(stockId));
            db.AddInParameter(dbcmd, "primaryname", DbType.String, "asdas");
            db.AddInParameter(dbcmd, "attachname", DbType.String, "asdas");
            OracleParameter oraPara1 = new OracleParameter("cur1", OracleDbType.RefCursor, ParameterDirection.Output);
            OracleParameter oraPara2 = new OracleParameter("cur2", OracleDbType.RefCursor, ParameterDirection.Output);

            //添加参数到cmd
            dbcmd.Parameters.Add(oraPara1);
            dbcmd.Parameters.Add(oraPara2);

            DataSet ds = db.ExecuteDataSet(dbcmd);