使用C++管理Excel图表的数据标签
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数据标签是图表的重要组成部分。我们可以轻松了解每个系列的值、百分比等信息。
数据标签选项
Aspose.Cells还允许使用DataLabels对象在运行时管理图表的数据标签。移动、更新和格式化图表的数据标签都很简单。
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管理图表的数据标签
用Aspose.Cells DataLabels 管理图表数据标签非常简单。
以下代码片段演示了如何管理DataLabels:
#include <iostream>
#include "Aspose.Cells.h"
using namespace Aspose::Cells;
using namespace Aspose::Cells::Charts;
int main()
{
Aspose::Cells::Startup();
// Instantiating a Workbook object
Workbook workbook;
// Adding a new worksheet to the Workbook object
int sheetIndex = workbook.GetWorksheets().Add();
// Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.GetWorksheets().Get(sheetIndex);
// Adding sample values to cells
worksheet.GetCells().Get(u"A1").PutValue(50);
worksheet.GetCells().Get(u"A2").PutValue(100);
worksheet.GetCells().Get(u"A3").PutValue(150);
worksheet.GetCells().Get(u"B1").PutValue(60);
worksheet.GetCells().Get(u"B2").PutValue(32);
worksheet.GetCells().Get(u"B3").PutValue(50);
// Adding a chart to the worksheet
int chartIndex = worksheet.GetCharts().Add(ChartType::Column, 5, 0, 15, 5);
// Accessing the instance of the newly added chart
Chart chart = worksheet.GetCharts().Get(chartIndex);
// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.GetNSeries().Add(u"A1:B3", true);
// Show value labels
chart.GetNSeries().Get(0).GetDataLabels().SetShowValue(true);
// Show series name labels
chart.GetNSeries().Get(1).GetDataLabels().SetShowSeriesName(true);
// Move labels to center
chart.GetNSeries().Get(1).GetDataLabels().SetPosition(LabelPositionType::Center);
// Save the file
workbook.Save(u"chart_datalabels.xlsx");
Aspose::Cells::Cleanup();
}