Adding Pie Chart to Excel worksheet

19 Sep 20244 minutes to read

A pie chart is a circular statistical graphic, which is divided into slices to illustrate numerical proportion of data in the Excel worksheet.

The following code snippet illustrate how to add pie chart to Excel worksheet using Flutter XlsIO.

DART

// Create a new Excel document.
final Workbook workbook = Workbook();

// Accessing worksheet via index.
final Worksheet sheet = workbook.worksheets[0];

// Setting value in the cell.
sheet.getRangeByName('A11').setText('Venue');
sheet.getRangeByName('A12').setText('Seating & Decor');
sheet.getRangeByName('A13').setText('Technical Team');
sheet.getRangeByName('A14').setText('performers');
sheet.getRangeByName('A15').setText('performer\'s Transport');
sheet.getRangeByName('B11:B15').numberFormat = '\$#,##0_)';
sheet.getRangeByName('B11').setNumber(17500);
sheet.getRangeByName('B12').setNumber(1828);
sheet.getRangeByName('B13').setNumber(800);
sheet.getRangeByName('B14').setNumber(14000);
sheet.getRangeByName('B15').setNumber(2600);

// Create an instances of chart collection.
final ChartCollection charts = ChartCollection(sheet);

// Add the chart.
final Chart chart1 = charts.add();

// Set Chart Type.
chart1.chartType = ExcelChartType.pie;

// Set data range in the worksheet.
chart1.dataRange = sheet.getRangeByName('A11:B15');
chart1.isSeriesInRows = false;

// set charts to worksheet.
sheet.charts = charts;

// save and dispose the workbook.
final List<int> bytes = workbook.saveSync();
workbook.dispose();

File('PieChart.xlsx').writeAsBytes(bytes);

Customizing Pie Charts in Excel

The following code illustrates how to customize various elements of a pie chart in Excel using Flutter XlsIO.

DART

// Create a new Excel document.
final Workbook workbook = Workbook();

// Accessing worksheet via index.
final Worksheet sheet = workbook.worksheets[0];

// Setting value in the cell.
sheet.getRangeByName('A1').setText('Task');
sheet.getRangeByName('A2').setText('Planning');
sheet.getRangeByName('A3').setText('Development');
sheet.getRangeByName('A4').setText('Testing');
sheet.getRangeByName('A5').setText('Documentation');
sheet.getRangeByName('A6').setText('Meetings');
sheet.getRangeByName('B2:B6').numberFormat = '\$#,##0_)';
sheet.getRangeByName('B1').setText('Hours');
sheet.getRangeByName('B2').setNumber(20);
sheet.getRangeByName('B3').setNumber(50);
sheet.getRangeByName('B4').setNumber(15);
sheet.getRangeByName('B5').setNumber(10);
sheet.getRangeByName('B6').setNumber(5);

// Create an instances of chart collection.
final ChartCollection charts = ChartCollection(sheet);

// Add the chart.
final Chart chart = charts.add();

// Set Chart Type.
chart.chartType = ExcelChartType.pie;

// Set data range in the worksheet.
chart.dataRange = sheet.getRangeByName('A1:B6');
chart.isSeriesInRows = false;

// Set chart title
chart.chartTitle = 'Project Time Allocation';
chart.chartTitleArea.bold = true;
chart.chartTitleArea.size = 10;
chart.chartTitleArea.color = "#050505";

// Set data labels
final ChartSerie serie1 = chart.series[0];
serie1.dataLabels.isValue = true;
serie1.dataLabels.textArea.bold = true;
serie1.dataLabels.textArea.size = 10;
serie1.dataLabels.textArea.color = '#000000';
serie1.dataLabels.textArea.fontName = 'Arial';
serie1.linePattern = ExcelChartLinePattern.solid;
serie1.linePatternColor = '#000000';

// Set charts to worksheet.
sheet.charts = charts;

// save and dispose the workbook.
final List<int> bytes = workbook.saveSync();
workbook.dispose();

File('PieChart.xlsx').writeAsBytes(bytes);

By executing the above code snippet, you will get the Excel document as follows.