渲染时间轴
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可能的使用场景
Aspose.Cells for JavaScript通过C++支持在不使用Office 2013、Office 2016、Office 2019和Office 365的情况下渲染时间线形状。如果将工作表转换成图片或将工作簿保存为PDF或HTML格式，您会看到时间线被正确渲染。
呈现时间轴
以下示例代码加载包含现有时间线的sample Excel文件，根据时间线名称获取形状对象，然后通过Shape.ToImage()方法将其渲染为图片。下图是显示渲染后时间线的输出图片。如图所示，时间线已被正确渲染，效果与示例Excel文件一致。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Export Timeline Shape as Image</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx" />
<button id="runExample">Run Example</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, ImageOrPrintOptions, ImageType, 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');
const resultDiv = document.getElementById('result');
const downloadLink = document.getElementById('downloadLink');
if (!fileInput.files.length) {
resultDiv.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 loading the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access second worksheet (index 1)
const sheet = workbook.worksheets.get(1);
// Add timeline relating to pivot table (access first timeline)
const timeline = sheet.timelines.get(0);
// Prepare image options
const options = new ImageOrPrintOptions();
options.imageType = ImageType.Png;
// Get timeline shape object by timeline's name
const timeLineShape = sheet.shapes.get(timeline.name);
// Export shape to image (browser returns image bytes)
const imageData = timeLineShape.toImage(options);
// Create blob and provide download link
const blob = new Blob([imageData], { type: 'image/png' });
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'out.png';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Timeline Image';
resultDiv.innerHTML = '<p style="color: green;">Timeline image generated successfully. Click the download link to save the image.</p>';
});
</script>
</html>