public LinkedList GetGroupNameByChartID(string chartId)
        {
            LinkedList llGroupName = new LinkedList();
            DataSet    dsGroupName = new DataSet();

            dsGroupName = _ws.GetGroupNameByChartId(chartId);

            if (dsGroupName.Tables.Count > 0 && dsGroupName.Tables[0].Rows.Count > 0)
            {
                llGroupName.Add(COLUMN.GROUP_NAME, dsGroupName.Tables[0].Rows[0][COLUMN.GROUP_NAME].ToString());
            }

            return(llGroupName);
        }