Aggregates Above the Data

The FlexGrid control allows you to display the aggregates at the top of the data. To show aggregates above the data, follow these steps:

  1. Set the aggregate property on the columns that you want to aggregate,
  2. Create a single GroupDescription based on a dummy property, and
  3. Optionally freeze the top row to keep the aggregates in view.

Learn about FlexGrid | FlexGrid API Reference

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjCore from '@grapecity/wijmo'; import * as wjGrid from '@grapecity/wijmo.grid'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // generate some random data var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), products = 'Phones,Computers,Cameras,Stereos'.split(','), data = []; for (var i = 0; i < 200; i++) { data.push({ id: i, country: countries[i % countries.length], product: products[i % products.length], sales: Math.random() * 10000, expenses: Math.random() * 5000, }); } // // create a group to show the grand totals var grandTotalsGroup = new wjCore.PropertyGroupDescription('Grand Totals', function (item, propName) { return ''; }); // // show aggregates above the data var theGrid = new wjGrid.FlexGrid('#theGrid', { autoGenerateColumns: false, columns: [ { binding: 'id', header: 'ID', width: 60, isReadOnly: true }, { binding: 'country', header: 'Country' }, { binding: 'product', header: 'Product' }, { binding: 'sales', header: 'Sales', aggregate: 'Sum' }, { binding: 'expenses', header: 'Expenses', aggregate: 'Sum' } ], frozenRows: 1, itemsSource: new wjCore.CollectionView(data, { groupDescriptions: [grandTotalsGroup] }) }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Aggregate Above the Data</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <div id="theGrid"> </div> </div> </body> </html>
.wj-flexgrid { max-height: 250px; margin: 10px 0; } .wj-cell.wj-frozen-row { border-bottom: none; } body { margin-bottom: 20px; }
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