public static void Run()
{
// ExStart:1
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
// Open the existing file.
Workbook workbook = new Workbook(dataDir + "piechart.xls");
// Get the designer chart in the second sheet.
Worksheet sheet = workbook.Worksheets[1];
Aspose.Cells.Charts.Chart chart = sheet.Charts[0];
// Get the data labels in the data series of the third data point.
Aspose.Cells.Charts.DataLabels datalabels = chart.NSeries[0].Points[2].DataLabels;
// Change the text of the label.
datalabels.Text = "Unided Kingdom, 400K ";
// Save the excel file.
workbook.Save(dataDir + "output.xls");
// ExEnd:1
}
}