private Control CreateCellTable(PivotGridCellTemplateItem cell)
        {
            Dictionary <object, decimal> values = GetSummaryValues(cell.CreateDrillDownDataSource(), sourceField, cell.DataField);

            Table table = new Table();

            foreach (KeyValuePair <object, decimal> pair in values)
            {
                TableRow tr = new TableRow();
                table.Controls.Add(tr);
                TableCell tc1 = new TableCell();
                tc1.Style.Add(HtmlTextWriterStyle.Padding, "0px");
                tc1.Text = pair.Key.ToString();
                tr.Controls.Add(tc1);

                TableCell tc2 = new TableCell();
                tc2.Style.Add(HtmlTextWriterStyle.Padding, "0px");
                tc2.Text = pair.Value.ToString();
                tr.Controls.Add(tc2);
            }
            return(table);
        }