or
protected void RadGrid1_ExcelExportCellFormatting(object source, ExcelExportCellFormattingEventArgs e){ GridDataItem item = e.Cell.Parent as GridDataItem; if(item.ItemType == GridItemType.GroupHeader) item.Style["background-color"] = "#FFFF00";}protected void RadGrid1_ExcelExportCellFormatting(object source, ExcelExportCellFormattingEventArgs e){ GridDataItem item = e.Cell.Parent as GridDataItem; if (e.Cell.Text.Contains("Group:")) item.Style["background-color"] = "#FFFF00";}