使用 JavaScript 通过 C++ 查找图表系列中点的 X 和 Y 值类型
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可能的使用场景
有时候，您可能想知道系列中图表点的 X 和 Y 值的类型。Aspose.Cells for JavaScript 通过 C++ 提供了 ChartPoint.XValueType 和 ChartPoint.YValueType 属性，可用于此目的。请注意，您在有效使用这些属性之前，需要调用 Chart.calculate() 方法。
查找图表系列中点的X和Y值类型
以下示例代码加载了示例Excel文件，访问了第一个工作表中的第一个图表，然后调用Chart.calculate()方法，并找出第一个图表点的X值和Y值类型，并在控制台输出。请参考下面的控制台输出。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Find Type Of X and Y Values Of Points In Chart Series</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');
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 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);
// Calculate chart data.
chart.calculate();
// Access first chart point in the first series.
const point = chart.nSeries.get(0).points.get(0);
// Get the types of X and Y values of chart point.
const xValueType = point.xValueType;
const yValueType = point.yValueType;
// Display results
document.getElementById('result').innerHTML = `
<p style="color: green;">Operation completed successfully!</p>
<p>X Value Type: ${xValueType}</p>
<p>Y Value Type: ${yValueType}</p>
`;
});
</script>
</html>
控制台输出
X Value Type: IsString
Y Value Type: IsNumeric