columns property

Gets collection of columns in the table. Read-only.
// Create a new Excel Document.
  final Workbook workbook = Workbook(1);
  // Accessing sheet via index.
  final Worksheet sheet = workbook.worksheets[0];

  //Load data
  sheet.getRangeByName('A1').setText('Fruits');
  sheet.getRangeByName('A2').setText('banana');
  sheet.getRangeByName('A3').setText('Cherry');
  sheet.getRangeByName('A4').setText('Banana');

  sheet.getRangeByName('B1').setText('CostA');
  sheet.getRangeByName('B2').setNumber(744.6);
  sheet.getRangeByName('B3').setNumber(5079.6);
  sheet.getRangeByName('B4').setNumber(1267.5);

  sheet.getRangeByName('C1').setText('CostB');
  sheet.getRangeByName('C2').setNumber(162.56);
  sheet.getRangeByName('C3').setNumber(1249.2);
  sheet.getRangeByName('C4').setNumber(1062.5);

  // Creates a table with specified name and data range.Adds it to the tables collection.
  final ExcelTable table =
      sheet.tableCollection.create('Table1', sheet.getRangeByName('A1:C4'));

  // Set TableStyle
  table.builtInTableStyle = ExcelTableBuiltInStyles.tableStyleMedium10;

  // Set Totals
  table.showTotalRow = true;
  table.columns[0].totalRowLabel = 'Total';
  table.columns[1].totalFormula = ExcelTableTotalFormula.sum;
  table.columns[2].totalFormula = ExcelTableTotalFormula.average;

  //save and dispose.
  final List<int> bytes = workbook.saveAsStream();
  saveAsExcel(bytes, 'Table.xlsx');
  workbook.dispose();
Implementation

ExcelTable class
