在radgrid中合并两行或更多行

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
    if (e.Item is GridDataItem)
    {
        GridDataItem item = (GridDataItem)e.Item;
        TableCell nameCell = item["NameColumn"];

        if (nameCell != null)
        {
            int rowIndex = item.ItemIndex;
            int rowSpan = 1;

            // 检查下一行是否具有相同的值
            while (rowIndex < RadGrid1.Items.Count - 1 && nameCell.Text == RadGrid1.Items[rowIndex + 1]["NameColumn"].Text)
            {
                rowSpan++;
                rowIndex++;
            }

            // 合并行
            nameCell.RowSpan = rowSpan;
        }
    }
}