Tips:CSVファイルのインポートとエクスポート

このサンプルでは、FlexGridにCSVをインポートおよびエクスポートする方法を紹介します。

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import { saveFile } from '@mescius/wijmo'; import { FlexGrid, SelectionMode, CellRange } from '@mescius/wijmo.grid'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { var theGrid = new FlexGrid('#theGrid', { autoGenerateColumns: false, columns: [ { binding: 'id', header: 'ID', width: 80 }, { binding: 'from', header: '送付元' }, { binding: 'to', header: '送付先' }, { binding: 'sales', header: '売上', width: 80 }, { binding: 'expenses', header: '費用', width: 80 }, { binding: 'amount', header: '金額', width: 80 }, { binding: 'extra', header: '追加費用', width: 80 }, ], alternatingRowStep: 0, showMarquee: true, showSelectedHeaders: 'All', anchorCursor: true, selectionMode: SelectionMode.MultiRange, itemsSource: getData(), }); // グリッドデータをCSVにエクスポートする 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'); }); document.getElementById('btn-csv-load').addEventListener('click', () => { let fileInput = document.getElementById('importFile'); if (fileInput.files[0]) { if (fileInput.files[0].type == 'text/csv') { loadCSV(fileInput.files[0]); } } }); function toHeaderCase(header) { return header; } function loadCSV(file) { if (file) { const reader = new FileReader(); reader.onload = function () { let rowData = reader.result; rowData = rowData.replace(/"([^"]*)"/g, (match) => { return match.replace(/,/g, ''); }); const newData = rowData.replaceAll('\r\n', '\n').replaceAll('"', ''); const dataArr = newData.split('\n').map((r) => r.split(/,(?!\s)/)); const source = dataArr.slice(1).map((rowData) => { const dataItem = {}; let key = 0; rowData.forEach((val, i) => { let _key = dataArr[0][i]; if (Object.keys(dataItem).indexOf(_key) != -1) { key += 1; } const val1 = parseFloat(val); if (val1 === val1) { dataItem[_key] = parseFloat(val); } else { dataItem[_key] = val; } }); return dataItem; }); // グリッドにデータをセットする theGrid.columns.clear(); theGrid.autoGenerateColumns = true; theGrid.itemsSource = source; theGrid.columns.slice().forEach(col => { if (col.header != toHeaderCase(dataArr[0][col.index])) { col.header = toHeaderCase(dataArr[0][col.index]); } }); }; reader.readAsText(file); } } // ランダムなデータを作成する function getData() { var data = []; var countries = 'オーストリア,ベルギー,チリ,デンマーク,フィンランド,日本,イギリス'.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 FlexChart Stacked ChartsSide By Side</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous" referrerpolicy="no-referrer"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <div id="theGrid"></div> <button id="btn-csv-grid" class="btn btn-primary"> グリッド全体をエクスポート </button> <button id="btn-csv-sel" class="btn btn-primary"> 選択範囲をエクスポート </button> <input type="file" class="form-control" id="importFile" accept=".csv" /> <button id="btn-csv-load" class="btn btn-primary"> インポート </button> </div> </body> </html>
body { margin-bottom: 24px; min-width: 40em; overflow: auto; } .wj-flexgrid { height: 300px; }
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