private static ArrayList DataTableToArrayList(DataTable data)
        {
            ArrayList array = new ArrayList();
            for (int i = 0; i < data.Rows.Count; i++)
            {
                DataRow row = data.Rows[i];
                Hashtable record = new Hashtable();
                for (int j = 0; j < data.Columns.Count; j++)
                {
                    object cellValue = row[j];
                    if (cellValue.GetType() == typeof(DBNull))
                    {
                        cellValue = null;
                    }
                    record[data.Columns[j].ColumnName] = cellValue;
                }
                array.Add(record);
            }
            return array;
        }