将含有图像或图表的XLS文件转换为PDF，使用JavaScript通过C++
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Aspose.Cells支持将含有图像和图表的XLS文件转换为PDF文档。Aspose.Cells for Java脚本通过C++可以独立完成从电子表格到PDF的转换：不需要JavaScript版Aspose.PDF。该过程在内存中完成，不依赖临时或中间XML文件。这意味着可以快速高效地转换大型Excel文件，例如包含图像、图表和其他绘图对象的文件。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Convert Excel to PDF Example</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Convert to PDF</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, Utils } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiating a Workbook object by opening the Excel file from the file input
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Save the workbook as PDF
const outputData = workbook.save(SaveFormat.Pdf);
const blob = new Blob([outputData], { type: 'application/pdf' });
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'Output.out.pdf';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download PDF File';
document.getElementById('result').innerHTML = '<p style="color: green;">PDF generated successfully! Click the download link to get the PDF file.</p>';
});
</script>
</html>
如果电子表格包含公式，建议在渲染为PDF之前调用Workbook.calculateFormula()方法。这确保公式依赖的值被重新计算，正确的值会在PDF中显示。