Multi-Range Selection

Set FlexGrid's selectionMode property to MultiRange to enable Excel-style multi-range selection. Users will be able to select multiple ranges by ctrl-clicking and dragging on the grid.

The sample shows how you can provide Excel-style dynamic data summaries for the current selection (regular or multi-range) and how to export selected ranges to CSV files.

Note that clipboard and export commands only work for multi-range selections if all selected ranges refer to the same column range or to the same row range. (Excel also behaves this way.)

Learn about FlexGrid | FlexGrid API Reference

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import { glbz, isNumber, saveFile } from '@grapecity/wijmo'; import { FlexGrid, SelectionMode, CellRange } from '@grapecity/wijmo.grid'; document.readyState === 'complete' ? init() : window.onload = init; ; function init() { // show the data in a grid var theGrid = new FlexGrid('#theGrid', { alternatingRowStep: 0, showMarquee: true, showSelectedHeaders: 'All', anchorCursor: true, selectionMode: SelectionMode.MultiRange, itemsSource: getData(), // update aggregate display when selection changes selectionChanged: (s, e) => { // calculate aggregates let tally = { cnt: 0, cntAll: 0, sum: 0, avg: 0 }, ranges = s.selectedRanges; for (let i = 0; i < ranges.length; i++) { aggregateRange(tally, s, ranges, i); } // update the display using template literals let msg = (tally.cnt > 1) ? glbz `Count: <b>${tally.cntAll}:n0</b>\tAverage: <b>${tally.avg}:g4\tSum: <b>${tally.sum}:g4</b>` : (tally.cntAll > 1) ? glbz `Count: <b>${tally.cntAll}:n0</b>` : 'Ready'; // update the display using wijmo.format //let msg = (tally.cnt > 1) // ? format('Count: <b>{cntAll:n0}</b>\tAverage: <b>{avg:g4}</b>\tSum: <b>{sum:g4}</b>', tally) // : (tally.cntAll > 1) // ? format('Count: <b>{cntAll:n0}</b>', tally) // : 'Ready'; // show the result document.getElementById('mr-aggregates').innerHTML = msg; } }); // update aggregates for a range, accounting for overlapping ranges function aggregateRange(tally, grid, ranges, index) { let rng = ranges[index]; for (let r = rng.topRow; r <= rng.bottomRow; r++) { for (let c = rng.leftCol; c <= rng.rightCol; c++) { // account for overlapping ranges let overlapped = false; for (let i = 0; i < index && !overlapped; i++) { let rng = ranges[i]; if (rng.contains(r, c)) { overlapped = true; } } // tally non-overlapped cells if (!overlapped) { let data = grid.getCellData(r, c, false); if (isNumber(data)) { // handle numbers tally.cnt++; tally.sum += data; } if (data !== '' && data !== null) { // handle non-empty cells tally.cntAll++; } } } } tally.avg = tally.cnt > 0 ? tally.sum / tally.cnt : 0; } // export grid or selection to CSV document.getElementById('btn-csv-grid').addEventListener('click', () => { var rng = new CellRange(0, 0, theGrid.rows.length - 1, theGrid.columns.length - 1), csv = theGrid.getClipString(rng, true, true); saveFile(csv, 'FlexGrid.csv'); }); document.getElementById('btn-csv-sel').addEventListener('click', () => { var csv = theGrid.getClipString(null, true, true); saveFile(csv, 'FlexGridSelection.csv'); }); // create some random data function getData() { var data = []; var countries = 'Austria,Belgium,Chile,Denmark,Finland,Japan,UK'.split(','); for (var i = 0; i < 300; i++) { data.push({ id: i, from: countries[i % countries.length], to: countries[(i + 1) % countries.length], sales: Math.random() * 10000, expenses: Math.random() * 5000, amount: Math.random() * 10000, extra: Math.random() * 10000, }); } return data; } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Multiple Selection</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> <pre id="mr-aggregates">Ready</pre> <button id="btn-csv-grid" class="btn btn-primary"> Export Whole Grid </button> <button id="btn-csv-sel" class="btn btn-primary"> Export Selection </button> </div> </body> </html>
.wj-flexgrid { height: 300px; }
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