var workbook = ExcelFile.Load("officeDials.xlsx"); var worksheet = workbook.Worksheets[0]; worksheet.PrintOptions.PrintHeadings = true; worksheet.PrintOptions.PrintGridlines = true; worksheet.NamedRanges.SetPrintArea(worksheet.Cells.GetSubrange("A2", "C33")); var options = new HtmlSaveOptions() { HtmlType = HtmlType.Html, SelectionType = SelectionType.EntireFile }; workbook.Save("officeDials.html", options);