private void MatchExcelAndDbColumns()
        {
            foreach (GridViewRow row in dgvColumns.Rows)
            {
                string excelCol = row.Cells[0].Text.Trim().ToUpper();
                IQueryable <ListItem> dbColItems = (row.Cells[1].FindControl("ItemDropDown") as DropDownList).Items.Cast <ListItem>().AsQueryable() as IQueryable <ListItem>;
                string[] dbCols = dbColItems.Where(i => !i.Value.Contains("IGNORE")).Select(i => i.Value).ToArray();

                string   bestMatch = LevenshteinDistance.FindBestMatch(excelCol, dbCols);
                ListItem bestItem  = (row.Cells[1].FindControl("ItemDropDown") as DropDownList).Items.FindByValue(bestMatch);

                if (bestItem != null)
                {
                    bestItem.Selected = true;
                }
            }
        }