Calculate Page Setup Scaling Factor with Node.js via C++

When you set Page Setup Scaling using Fit to n page(s) wide by m tall option, Microsoft Excel calculates the Page Setup Scaling Factor. You can calculate the same thing using SheetRender.getPageScale() property. This property returns a double value that can be converted to percentage value. For example, if it returns 0.5 then it means scaling factor is 50%.

The following sample code illustrates how to calculate page setup scaling factor using SheetRender.getPageScale() property.

const path = require("path");
const AsposeCells = require("aspose.cells.node");

// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
const filePath = path.join(dataDir, "sample.xlsx");
// Loads the workbook which contains hidden external links
const workbook = new AsposeCells.Workbook(filePath);

// Access first worksheet
const worksheet = workbook.getWorksheets().get(0);

// Put some data in these cells
worksheet.getCells().get("A4").putValue("Test");
worksheet.getCells().get("S4").putValue("Test");

// Set paper size
worksheet.getPageSetup().setPaperSize(AsposeCells.PaperSizeType.PaperA4);

// Set fit to pages wide as 1
worksheet.getPageSetup().setFitToPagesWide(1);

// Calculate page scale via sheet render
const sr = new AsposeCells.SheetRender(worksheet, new AsposeCells.ImageOrPrintOptions());

// Convert page scale double value to percentage
const strPageScale = (sr.getPageScale() * 100).toFixed(0) + "%";

// Write the page scale value
console.log(strPageScale);