向图表系列中的数据点添加自定义标签

您可以将自定义标签添加到图表系列中的数据点。 Aspose.Cells提供ChartPoint.DataLabels.文本属性来添加这些自定义标签。本文将解释如何使用此属性为图表系列中的数据点添加自定义标签。

以下代码创建由带有数据标记的线连接的散点图然后添加自定义标签到数据点在里面系列的图表.每个自定义标签显示系列名称和点名.您可以使用任何其他文本代替它。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

Workbook workbook = new Workbook(FileFormatType.Xlsx);
Worksheet sheet = workbook.Worksheets[0];

// Put data
sheet.Cells[0, 0].PutValue(1);
sheet.Cells[0, 1].PutValue(2);
sheet.Cells[0, 2].PutValue(3);

sheet.Cells[1, 0].PutValue(4);
sheet.Cells[1, 1].PutValue(5);
sheet.Cells[1, 2].PutValue(6);

sheet.Cells[2, 0].PutValue(7);
sheet.Cells[2, 1].PutValue(8);
sheet.Cells[2, 2].PutValue(9);

// Generate the chart
int chartIndex = sheet.Charts.Add(Aspose.Cells.Charts.ChartType.ScatterConnectedByLinesWithDataMarker, 5, 1, 24, 10);
Chart chart = sheet.Charts[chartIndex];

chart.Title.Text = "Test";
chart.CategoryAxis.Title.Text = "X-Axis";
chart.ValueAxis.Title.Text = "Y-Axis";

chart.NSeries.CategoryData = "A1:C1";

// Insert series
chart.NSeries.Add("A2:C2", false);

Series series = chart.NSeries[0];

int pointCount = series.Points.Count;
for (int i = 0; i < pointCount; i++)
{
    ChartPoint pointIndex = series.Points[i];

    pointIndex.DataLabels.Text = "Series 1" + "\n" + "Point " + i;
}

// Insert series
chart.NSeries.Add("A3:C3", false);

series = chart.NSeries[1];

pointCount = series.Points.Count;
for (int i = 0; i < pointCount; i++)
{
    ChartPoint pointIndex = series.Points[i];

    pointIndex.DataLabels.Text = "Series 2" + "\n" + "Point " + i;
}

workbook.Save(dataDir + "output_out.xlsx", Aspose.Cells.SaveFormat.Xlsx);