How to Export the pdf file with fit all columns in single page

  @Html.EJS().Spreadsheet("spreadsheet").SaveUrl("api/Spreadsheet/Save").Created("createdHandler").Sheets(sheet =>
    {
        sheet.Name("Car Sales Report").Ranges(ranges =>
        {
            ranges.DataSource((IEnumerable<object>)ViewBag.DefaultData).Add();
        }).Rows(row =>
           {
            row.Cells(cell =>
            {
                cell.Value("Customer Name").Add();
                cell.Index(3).Value("Payment Mode").Add();
                cell.Value("Delivery Date").Add();
            }).Add();
            row.Index(30).Cells(cell =>
            {
                cell.Index(4).Value("Total Amount:").Style(new SpreadsheetCellStyle() { FontWeight = FontWeight.Bold, TextAlign = TextAlign.Right }).Add();
                cell.Formula("=SUM(F2:F30)").Style(new SpreadsheetCellStyle() { FontWeight = FontWeight.Bold }).Add();
            }).Add();
        }).Columns(column =>
        {
            column.Width(180).Add();
            column.Width(130).Add();
            column.Width(130).Add();
            column.Width(180).Add();
            column.Width(130).Add();
            column.Width(120).Add();
        }).Add();
    }).Render()
 
  <script>
        // Triggers once the control is loaded
        function createdHandler() {
            // Applies cell and number formatting to specified range of the active sheet
            this.cellFormat({ fontWeight: 'bold', textAlign: 'center', verticalAlign: 'middle' }, 'A1:F1');
            this.numberFormat('$#,##0.00', 'F2:F31');
        }
  </script>

[System.Web.Http.Route("api/Spreadsheet/Save")]
[System.Web.Http.HttpPost, ValidateInput(false)]
public void Save(SaveSettings saveSettings)
{
   if (saveSettings.SaveType.ToString() == "Pdf")
     {
        saveSettings.SaveType = SaveType.Xlsx;
        {
           ExcelEngine excelEngine = new ExcelEngine();
           IApplication application = excelEngine.Excel;
           Stream fileStream = Workbook.Save<Stream>(saveSettings);
 
           IWorkbook workbook = application.Workbooks.Open(fileStream);
 
           saveSettings.SaveType = SaveType.Pdf;
 
           //Convert the workbook
           ExcelToPdfConverter converter = new ExcelToPdfConverter(workbook);
 
           //Initializes the Excel To PDF converter setting class
           ExcelToPdfConverterSettings converterSettings = new ExcelToPdfConverterSettings();
 
            converterSettings.DisplayGridLines = GridLinesDisplayStyle.Visible;
 
           //Layout the page using FitAllColumnsOnOnePage options
            converterSettings.LayoutOptions = LayoutOptions.FitAllColumnsOnOnePage;
 
            //Initialize PDF document
            PdfDocument pdfDocument = new PdfDocument();
 
            // Convert Excel document into PDF document
            pdfDocument = converter.Convert(converterSettings);
 
            saveSettings.SaveType = SaveType.Pdf;
 
            //Save the PDF file
            pdfDocument.Save(saveSettings.FileName + "." + saveSettings.SaveType.ToString().ToLower(), HttpContext.Current.Response, HttpReadType.Save);
                }
            }
            else Workbook.Save(saveSettings);
 
        }

<ejs-spreadsheet id="spreadsheet" saveUrl="Home/Save" created="createdHandler">
    <e-spreadsheet-sheets>
        <e-spreadsheet-sheet name="Car Sales Report">
            <e-spreadsheet-ranges>
                <e-spreadsheet-range dataSource="ViewBag.DefaultData"></e-spreadsheet-range>
            </e-spreadsheet-ranges>
            <e-spreadsheet-rows>
                <e-spreadsheet-row>
                    <e-spreadsheet-cells>
                        <e-spreadsheet-cell value="Customer Name"></e-spreadsheet-cell>
                        <e-spreadsheet-cell index=3 value="Payment Mode"></e-spreadsheet-cell>
                        <e-spreadsheet-cell value="Delivery Date"></e-spreadsheet-cell>
                    </e-spreadsheet-cells>
                </e-spreadsheet-row>
                <e-spreadsheet-row index=30>
                    <e-spreadsheet-cells>
                        <e-spreadsheet-cell index=4 value="Total Amount:">
                            <e-spreadsheet-cellstyle fontWeight="Bold" textAlign="Right"></e-spreadsheet-cellstyle>
                        </e-spreadsheet-cell>
                        <e-spreadsheet-cell formula="=SUM(F2:F30)">
                            <e-spreadsheet-cellstyle fontWeight="Bold"></e-spreadsheet-cellstyle>
                        </e-spreadsheet-cell>
                    </e-spreadsheet-cells>
                </e-spreadsheet-row>
            </e-spreadsheet-rows>
            <e-spreadsheet-columns>
                <e-spreadsheet-column width="180"></e-spreadsheet-column>
                <e-spreadsheet-column width="130"></e-spreadsheet-column>
                <e-spreadsheet-column width="130"></e-spreadsheet-column>
                <e-spreadsheet-column width="180"></e-spreadsheet-column>
                <e-spreadsheet-column width="130"></e-spreadsheet-column>
                <e-spreadsheet-column width="120"></e-spreadsheet-column>
            </e-spreadsheet-columns>
        </e-spreadsheet-sheet>
    </e-spreadsheet-sheets>
</ejs-spreadsheet>
 
<script>
    function createdHandler() {
        //Applied style and number formatting to range of the active sheet
        this.cellFormat({ fontWeight: 'bold', textAlign: 'center', verticalAlign: 'middle' }, 'A1:F1');
        this.numberFormat('$#,##0.00', 'F2:F31');
    }
</script>

public IActionResult Save(SaveSettings saveSettings)
        {
            if (saveSettings.SaveType.ToString() == "Pdf")
            {
                saveSettings.SaveType = SaveType.Xlsx;
                ExcelEngine excelEngine = new ExcelEngine();
                IApplication application = excelEngine.Excel;
                Stream fileStream = Workbook.Save<Stream>(saveSettings);
 
                IWorkbook workbook = application.Workbooks.Open(fileStream);
 
                saveSettings.SaveType = SaveType.Pdf;
 
                //Initialize XlsIORendererSettings
                XlsIORendererSettings settings = new XlsIORendererSettings();
 
                //Set layout option as FitAllColumnsOnOnePage
                settings.LayoutOptions = LayoutOptions.FitAllColumnsOnOnePage;
 
                //Initialize XlsIORenderer
                XlsIORenderer renderer = new XlsIORenderer();
 
                int i, sheetCnt = workbook.Worksheets.Count;
                for (i = 0; i < sheetCnt; i++)
                {
                     workbook.Worksheets[i].PageSetup.PrintGridlines = true;
                     settings.DisplayGridLines = GridLinesDisplayStyle.Auto;
                }
                //Convert the Excel document to PDF with renderer settings
                PdfDocument document = renderer.ConvertToPDF(workbook, settings);
 
                //Saving the Excel to the MemoryStream 
                MemoryStream stream = new MemoryStream();
                document.Save(stream);
 
                //Set the position as '0'
                stream.Position = 0;
 
                //Download the PDF file in the browser
                FileStreamResult fileStreamResult = new FileStreamResult(stream, "application/pdf");
                fileStreamResult.FileDownloadName = "Output.pdf";
                return fileStreamResult;
            }
            else
            {
                return Workbook.Save(saveSettings);
            }
            
        }