用JavaScript通过C++处理图表轴的自动单位
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可能的使用场景
早期版本的Aspose.Cells for JavaScript via C++在将图表渲染为图像或PDF时未能正确处理图表轴的自动单位。现在，Aspose.Cells for JavaScript通过C++支持自动单位的处理。无需代码更改，只需将您的图表转换为图像或PDF即可，它会像Microsoft Excel一样渲染轴线。
处理Microsoft Excel的图表轴的自动单位
以下示例代码加载了示例Excel文件，并生成了输出PDF图表。截图显示了红色矩形中的图表轴自动单位，并且还将示例Excel文件中的图表与输出的PDF图表进行了比较，两者完全相同。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Handle Automatic Units Of Chart Axis Like Microsoft Excel</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<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, Utils } = AsposeCells;
const readyPromise = 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;
}
await readyPromise;
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiating a Workbook object using the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access first worksheet
const worksheet = workbook.worksheets.get(0);
// Access first chart
const chart = worksheet.charts.get(0);
// Render chart to pdf
const outputData = await chart.toPdf();
// Create download link for the generated PDF
const blob = new Blob([outputData], { type: 'application/pdf' });
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'outputHandleAutomaticUnitsOfChartAxisLikeMicrosoftExcel.pdf';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download PDF File';
document.getElementById('result').innerHTML = '<p style="color: green;">Chart rendered to PDF successfully! Click the download link to get the PDF file.</p>';
});
</script>
</html>