如何使用JavaScript通过C++创建组合图表
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可能的使用场景
Excel中的组合图表让您能够利用此选项，因为您可以轻松地组合两种或更多种图表类型，以使您的数据易于理解。当您的数据包含多种值（包括价格和交易量）时，组合图表是有用的。此外，当您的数据数字在系列之间有明显变化时，组合图表是可行的。 以以下数据集为例，我们可以观察到这些数据与VHCL中提到的数据相当相似。如果我们希望将与“总收入”对应的series0可视化为线图表，应该如何操作？
组合图表
运行以下代码后，您将看到下面展示的组合图表。
示例代码
以下示例代码加载了示例Excel文件并生成了输出Excel文件。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Combo Chart Example</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 } = 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();
// Create the workbook from uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access the first worksheet
const worksheet = workbook.worksheets.get(0);
// Add a stock volume (VHLC)
const pieIdx = worksheet.charts.add(AsposeCells.ChartType.StockVolumeHighLowClose, 15, 0, 34, 12);
// Retrieve the Chart object
const chart = worksheet.charts.get(pieIdx);
// Set the legend can be showed
chart.showLegend = true;
// Set the chart title name
chart.title.text = "Combo Chart";
// Set the Legend at the bottom of the chart area
chart.legend.position = AsposeCells.LegendPositionType.Bottom;
// Set data range (preserving both args as an array)
chart.chartDataRange = ["A1:E12", true];
// Set category data
chart.nSeries.get(0).xValues = "A2:A12"; // Corrected method
// Set the Series[1] Series[2] and Series[3] to different Marker Style
for (let j = 0; j < chart.nSeries.count; j++) {
switch (j) {
case 1:
chart.nSeries.get(j).marker.markerStyle = AsposeCells.ChartMarkerType.Circle;
chart.nSeries.get(j).marker.markerSize = 15;
chart.nSeries.get(j).marker.area.formatting = AsposeCells.FormattingType.Custom;
chart.nSeries.get(j).marker.area.foregroundColor = AsposeCells.Color.Pink;
chart.nSeries.get(j).border.isVisible = false;
break;
case 2:
chart.nSeries.get(j).marker.markerStyle = AsposeCells.ChartMarkerType.Dash;
chart.nSeries.get(j).marker.markerSize = 15;
chart.nSeries.get(j).marker.area.formatting = AsposeCells.FormattingType.Custom;
chart.nSeries.get(j).marker.area.foregroundColor = AsposeCells.Color.Orange;
chart.nSeries.get(j).border.isVisible = false;
break;
case 3:
chart.nSeries.get(j).marker.markerStyle = AsposeCells.ChartMarkerType.Square;
chart.nSeries.get(j).marker.markerSize = 15;
chart.nSeries.get(j).marker.area.formatting = AsposeCells.FormattingType.Custom;
chart.nSeries.get(j).marker.area.foregroundColor = AsposeCells.Color.LightBlue;
chart.nSeries.get(j).border.isVisible = false;
break;
}
}
// Set the chart type for Series[0]
chart.nSeries.get(0).type = AsposeCells.ChartType.Line;
// Set style for the border of first series
chart.nSeries.get(0).border.style = AsposeCells.LineType.Solid;
// Set Color for the first series
chart.nSeries.get(0).border.color = AsposeCells.Color.DarkBlue;
// Fill the PlotArea area with nothing
chart.plotArea.area.formatting = AsposeCells.FormattingType.None;
// Save the Excel file and provide download link
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'out.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Result';
document.getElementById('result').innerHTML = '<p style="color: green;">Chart updated successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>