使用Node.js导出工作表或图表为具有指定宽度和高度的图片
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你可以使用Aspose.Cells for Node.js via C++将工作表或图表导出为具有所需宽度和高度的图片。它提供ImageOrPrintOptions.setDesiredSize(number, number, boolean)方法来设置导出图片的宽度和高度，单位为像素。
以下代码将工作表导出为一个 400x400 大小的图像。
const path = require("path");
const AsposeCells = require("aspose.cells.node");
// Source directory
const sourceDir = path.join(__dirname, "data");
// Output directory
const outputDir = path.join(__dirname, "output");
// Create workbook object from source file
const filePath = path.join(sourceDir, "sampleWorksheetToImageDesiredSize.xlsx");
const workbook = new AsposeCells.Workbook(filePath);
// Access first worksheet
const worksheet = workbook.getWorksheets().get(0);
// Set image or print options we want one page per sheet. The image format is in png and desired dimensions are 400x400
const opts = new AsposeCells.ImageOrPrintOptions();
opts.setOnePagePerSheet(true);
opts.setImageType(AsposeCells.ImageType.Png);
opts.setDesiredSize(400, 400, false);
// Render sheet into image
const sr = new AsposeCells.SheetRender(worksheet, opts);
sr.toImage(0, path.join(outputDir, "outputWorksheetToImageDesiredSize.png"));