使用 C++ 通过 Node.js 管理 Excel 图表的图例

图例选项

Aspose.Cells for Node.js via C++ 也允许在运行时管理图表的图例。 Legend 对象可以移动、更新和格式化。

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设置图表的图例

使用 Aspose.Cells Legend 很容易管理图表的图例。

以下代码片段演示如何管理图例：

const path = require("path");
const AsposeCells = require("aspose.cells.node");

// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
const filePath = path.join(dataDir, "sample.xlsx");

// Instantiating a Workbook object
const workbook = new AsposeCells.Workbook();

// Adding a new worksheet to the Workbook object
const sheetIndex = workbook.getWorksheets().add();

// Obtaining the reference of the newly added worksheet by passing its sheet index
const worksheet = workbook.getWorksheets().get(sheetIndex);

// Adding sample values to cells
worksheet.getCells().get("A1").putValue(50);
worksheet.getCells().get("A2").putValue(100);
worksheet.getCells().get("A3").putValue(150);
worksheet.getCells().get("B1").putValue(60);
worksheet.getCells().get("B2").putValue(32);
worksheet.getCells().get("B3").putValue(50);

// Adding a chart to the worksheet
const chartIndex = worksheet.getCharts().add(AsposeCells.ChartType.Column, 5, 0, 15, 5);

// Accessing the instance of the newly added chart
const chart = worksheet.getCharts().get(chartIndex);

// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.getNSeries().add("A1:B3", true);

// Setting the title of a chart
chart.getTitle().setText("Title");

// Setting the font color of the chart title to blue
chart.getTitle().getFont().setColor(AsposeCells.Color.Blue);

// Move the legend to left
chart.getLegend().setPosition(AsposeCells.LegendPositionType.Left);

// Set font color of the legend
chart.getLegend().getFont().setColor(AsposeCells.Color.Blue);

// Save the file
workbook.save("chart_legend.xlsx");

高级主题

• 使用Aspose.Cells将图例条目填充的文本设置为无