How to change data point label color of a Waterfall chart?

26 May 20226 minutes to read

The following code snippet shows how to change data point label color of a Waterfall chart.

using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;
  IWorkbook workbook = application.Workbooks.Open("Sample.xlsx", ExcelOpenType.Automatic);
  IWorksheet sheet = workbook.Worksheets[0];

  //Accessing first chart in the sheet
  IChartShape chart = sheet.Charts[0];

  //Changing first data point label color
  chart.Series[0].DataPoints[0].DataLabels.IsValue = true;
  chart.Series[0].DataPoints[0].DataLabels.RGBColor = Color.Green;

  workbook.SaveAs("Waterfall.xlsx");
}
Using excelEngine As ExcelEngine = New ExcelEngine()
  Dim application As IApplication = excelEngine.Excel
  application.DefaultVersion = ExcelVersion.Excel2016
  Dim workbook As IWorkbook = application.Workbooks.Open("Sample.xlsx", ExcelOpenType.Automatic)
  Dim sheet As IWorksheet = workbook.Worksheets(0)

  'Create a chart
  Dim chart As IChartShape = sheet.Charts(0)
  
  'Changing first data point label color
  chart.Series(0).DataPoints(0).DataLabels.IsValue = true
  chart.Series(0).DataPoints(0).DataLabels.RGBColor = Color.Green

  workbook.SaveAs("Waterfall.xlsx")
End Using
using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;

  //Instantiates the File Picker
  FileOpenPicker openPicker = new FileOpenPicker();
  openPicker.SuggestedStartLocation = PickerLocationId.Desktop;
  openPicker.FileTypeFilter.Add(".xlsx");
  openPicker.FileTypeFilter.Add(".xls");
  StorageFile file = await openPicker.PickSingleFileAsync();

  //Opens the workbook
  IWorkbook workbook = await application.Workbooks.OpenAsync(file, ExcelOpenType.Automatic);
  IWorksheet sheet = workbook.Worksheets[0];

  //Accessing first chart in the sheet
  IChartShape chart = sheet.Charts[0];

  //Changing first data point label color
  chart.Series[0].DataPoints[0].DataLabels.IsValue = true;
  chart.Series[0].DataPoints[0].DataLabels.RGBColor = Color.Green;

  //Initializes FileSavePicker
  FileSavePicker savePicker = new FileSavePicker();
  savePicker.SuggestedStartLocation = PickerLocationId.Desktop;
  savePicker.SuggestedFileName = "Waterfall";
  savePicker.FileTypeChoices.Add("Excel Files", new List<string>() { ".xlsx" });

  //Creates a storage file from FileSavePicker
  StorageFile storageFile = await savePicker.PickSaveFileAsync();

  //Saves changes to the specified storage file
  await workbook.SaveAsAsync(storageFile);
}
using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;
  FileStream inputStream = new FileStream("Sample.xlsx", FileMode.Open, FileAccess.Read);
  IWorkbook workbook = application.Workbooks.Open(inputStream,ExcelOpenType.Automatic);
  IWorksheet sheet = workbook.Worksheets[0];

  //Accessing first chart in the sheet
  IChartShape chart = sheet.Charts[0];

  //Changing first data point label color
  chart.Series[0].DataPoints[0].DataLabels.IsValue = true;
  chart.Series[0].DataPoints[0].DataLabels.RGBColor = Color.Green;

  //Saving the workbook as stream
  FileStream stream = new FileStream("Waterfall.xlsx", FileMode.Create, FileAccess.ReadWrite);
  workbook.SaveAs(stream);
  stream.Dispose();
}
using (ExcelEngine excelEngine = new ExcelEngine())
{
  IApplication application = excelEngine.Excel;
  application.DefaultVersion = ExcelVersion.Excel2016;

  //"App" is the class of Portable project
  Assembly assembly = typeof(App).GetTypeInfo().Assembly;
  Stream inputStream = assembly.GetManifestResourceStream("SampleBrowser.XlsIO.Samples.Template.Sample.xlsx");
  IWorkbook workbook = application.Workbooks.Open(inputStream,ExcelOpenType.Automatic);
  IWorksheet sheet = workbook.Worksheets[0];

  //Accessing first chart in the sheet
  IChartShape chart = sheet.Charts[0];

  //Changing first data point label color
  chart.Series[0].DataPoints[0].DataLabels.IsValue = true;
  chart.Series[0].DataPoints[0].DataLabels.RGBColor = Color.Green;

  //Saving the workbook as stream
  MemoryStream stream = new MemoryStream();
  workbook.SaveAs(stream);

  stream.Position = 0;

  //Save the document as file and view the saved document

  //The operation in SaveAndView under Xamarin varies between Windows Phone, Android and iOS platforms. Please refer xlsio/xamarin section for respective code samples.

  if (Device.OS == TargetPlatform.WinPhone || Device.OS == TargetPlatform.Windows)
  {
	Xamarin.Forms.DependencyService.Get<ISaveWindowsPhone>().SaveAndView("Waterfall.xlsx", "application/msexcel", stream);
  }
  else
  {
	Xamarin.Forms.DependencyService.Get<ISave>().SaveAndView("Waterfall.xlsx", "application/msexcel", stream);
  }
}

See Also