在用 C++ 通过 JavaScript 计算图表后读取坐标轴标签
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可能的使用场景
你可以使用 Chart.calculate() 方法在计算图表值后读取你的图表的坐标轴标签。请使用 Axis.axisTexts 属性实现此目的，它将返回坐标轴标签的列表。
计算图表后读取轴标签
请参阅以下示例代码，加载[sample Excel file]（ReadAxisLabels.xlsx）并读取第一个工作表中图表的类别轴标签。然后在控制台上打印轴标签的值。请参阅下面的示例代码的控制台输出进行参考。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example - Read Axis Labels</title>
</head>
<body>
<h1>Read Chart Category Axis Labels</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, 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');
const resultDiv = document.getElementById('result');
resultDiv.innerHTML = '';
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 from the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access first worksheet
const worksheet = workbook.worksheets.get(0);
// Access the chart
const chart = worksheet.charts.get(0);
// Calculate the chart
chart.calculate();
// Read axis labels of category axis
const lstLabels = chart.categoryAxis.axisTexts;
// Display axis labels
let html = '<h2>Category Axis Labels:</h2>';
html += '<hr/>';
if (!lstLabels || !lstLabels.length) {
html += '<p>No axis labels found.</p>';
} else {
html += '<ul>';
for (let i = 0; i < lstLabels.length; i++) {
console.log(lstLabels[i]);
html += `<li>${lstLabels[i]}</li>`;
}
html += '</ul>';
}
resultDiv.innerHTML = html;
});
</script>
</html>
控制台输出
Category Axis Labels:
\---------------------
Iran
China
USA
Brazil
England