在使用C++中的JavaScript保存为HTML时启用CSS自定义属性
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可能的使用场景
当您将您的 Excel 文件保存为 HTML 时，对于存在多次出现的同一基础图片的场景，使用自定义属性可以仅保存一次图片数据，从而提升生成 HTML 的性能。请使用 HtmlSaveOptions.enableCssCustomProperties 属性并在保存为 HTML 时将其设置为 true。
在保存为HTML时启用CSS自定义属性
以下示例代码展示了 HtmlSaveOptions.enableCssCustomProperties 属性的用法。截图显示了未将此属性设置为 true 时的效果。请下载此代码用的【示例 Excel 文件】(50528260.xlsx) 和生成的【输出 HTML】(50528261.zip) 以供参考。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Enable CSS Custom Properties Example</title>
</head>
<body>
<h1>Enable CSS Custom Properties Example</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, Worksheet, Cell, 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 from the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Create HtmlSaveOptions and set properties (converted from setters to property assignments)
const opts = new AsposeCells.HtmlSaveOptions();
opts.exportImagesAsBase64 = true;
opts.enableCssCustomProperties = true;
// Save the workbook to HTML using SaveFormat.Html and provided options
const outputData = workbook.save(SaveFormat.Html, opts);
const blob = new Blob([outputData], { type: 'text/html' });
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'outputEnableCssCustomProperties.html';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download HTML File';
document.getElementById('result').innerHTML = '<p style="color: green;">HTML saved successfully! Click the download link to get the file.</p>';
});
</script>
</html>