var options = new ExcelExportingOptions();
 options.ExcelVersion = ExcelVersion.Excel2013;
 var excelEngine = sfDataGrid.ExportToExcel(sfDataGrid.View, options);
 var workBook = excelEngine.Excel.Workbooks[0];
 //Apply conditional format to worksheet
 IWorksheet worksheet = workBook.Worksheets[0];
 IConditionalFormats formats = worksheet["F2:F11"].ConditionalFormats;
 IConditionalFormat format = formats.AddCondition();
 format.FormatType = ExcelCFType.DataBar;
 IDataBar dataBar = format.DataBar;
 dataBar.BarColor = Color.Blue;
 workBook.SaveAs("Sample.xlsx");