グリッド:仮想OData

ODataCollectionViewクラスを使用すると、コントロールをODataソースに簡単に接続できます。ODataCollectionViewを作成すると、ソース内のデータの読み込みが開始されます。ODataVirtualCollectionViewは、オンデマンドデータの読み込みを提供するためにODataCollectionViewを拡張します。サーバーから自動的にデータを読み込むことはありません。代わりに、必要に応じてデータフラグメント(ウィンドウ)を読み込むためにsetWindowメソッドを使用します。下のグリッドは、両方のクラスがどのように機能するかを示しています。左側のグリッドが、徐々に読み込まれるデータをどのように表示しているかに注目してください。右側のグリッドにはレコードの総数がすぐに表示されますが、スクロールするまでデータは読み込まれません。

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import { format } from '@grapecity/wijmo'; import { ODataCollectionView, ODataVirtualCollectionView } from '@grapecity/wijmo.odata'; import { FlexGrid, CellType } from '@grapecity/wijmo.grid'; document.readyState === 'complete' ? init() : window.onload = init; function init() { // get order details into an ODataCollectionView var url = 'https://services.odata.org/Northwind/Northwind.svc'; var table = 'Order_Details_Extendeds'; var orderDetails = new ODataCollectionView(url, table); // show the data on a grid var itemCountElement = document.getElementById('itemCount'); var theGrid = new FlexGrid('#theGrid', { itemsSource: orderDetails, isReadOnly: true, formatItem: function (s, e) { if (e.panel.cellType == CellType.RowHeader) { e.cell.textContent = e.row + 1; } }, loadedRows: function (sender, e) { var el = document.getElementById('itemCount'); el.innerHTML = format('{length:n0}個の項目', sender.rows); } }); // get order details into a ODataVirtualCollectionView var virtualDetails = new ODataVirtualCollectionView(url, table, { loaded: function (sender, e) { var el = document.getElementById('totalItemCount'); el.innerHTML = format('{totalItemCount:n0}個の項目', sender); } }); // show the data on a grid var theVirtualGrid = new FlexGrid('#theVirtualGrid', { itemsSource: virtualDetails, isReadOnly: true, formatItem: function (s, e) { if (e.panel.cellType == CellType.RowHeader) { e.cell.textContent = e.row + 1; } }, scrollPositionChanged: function () { var rng = theVirtualGrid.viewRange; virtualDetails.setWindow(rng.row, rng.row2); } }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid OData and Virtual OData Binding</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 class="row"> <div class="col-sm-6"> <h4>ODataCollectionView</h4> <p id="itemCount"></p> <div id="theGrid"></div> </div> <div class="col-sm-6"> <h4>ODataVirtualCollectionView</h4> <p id="totalItemCount"></p> <div id="theVirtualGrid"></div> </div> </div> </div> </body> </html>
.wj-flexgrid { height: 300px; } .wj-flexgrid .wj-rowheaders .wj-cell { font-size: 80%; padding-top: .5em; } body { margin-bottom: 20pt; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@grapecity/wijmo': 'npm:@grapecity/wijmo/index.js', '@grapecity/wijmo.input': 'npm:@grapecity/wijmo.input/index.js', '@grapecity/wijmo.styles': 'npm:@grapecity/wijmo.styles', '@grapecity/wijmo.cultures': 'npm:@grapecity/wijmo.cultures', '@grapecity/wijmo.chart': 'npm:@grapecity/wijmo.chart/index.js', '@grapecity/wijmo.chart.analytics': 'npm:@grapecity/wijmo.chart.analytics/index.js', '@grapecity/wijmo.chart.animation': 'npm:@grapecity/wijmo.chart.animation/index.js', '@grapecity/wijmo.chart.annotation': 'npm:@grapecity/wijmo.chart.annotation/index.js', '@grapecity/wijmo.chart.finance': 'npm:@grapecity/wijmo.chart.finance/index.js', '@grapecity/wijmo.chart.finance.analytics': 'npm:@grapecity/wijmo.chart.finance.analytics/index.js', '@grapecity/wijmo.chart.hierarchical': 'npm:@grapecity/wijmo.chart.hierarchical/index.js', '@grapecity/wijmo.chart.interaction': 'npm:@grapecity/wijmo.chart.interaction/index.js', '@grapecity/wijmo.chart.radar': 'npm:@grapecity/wijmo.chart.radar/index.js', '@grapecity/wijmo.chart.render': 'npm:@grapecity/wijmo.chart.render/index.js', '@grapecity/wijmo.gauge': 'npm:@grapecity/wijmo.gauge/index.js', '@grapecity/wijmo.grid': 'npm:@grapecity/wijmo.grid/index.js', '@grapecity/wijmo.grid.detail': 'npm:@grapecity/wijmo.grid.detail/index.js', '@grapecity/wijmo.grid.filter': 'npm:@grapecity/wijmo.grid.filter/index.js', '@grapecity/wijmo.grid.search': 'npm:@grapecity/wijmo.grid.search/index.js', '@grapecity/wijmo.grid.grouppanel': 'npm:@grapecity/wijmo.grid.grouppanel/index.js', '@grapecity/wijmo.grid.multirow': 'npm:@grapecity/wijmo.grid.multirow/index.js', '@grapecity/wijmo.grid.transposed': 'npm:@grapecity/wijmo.grid.transposed/index.js', '@grapecity/wijmo.grid.pdf': 'npm:@grapecity/wijmo.grid.pdf/index.js', '@grapecity/wijmo.grid.sheet': 'npm:@grapecity/wijmo.grid.sheet/index.js', '@grapecity/wijmo.grid.xlsx': 'npm:@grapecity/wijmo.grid.xlsx/index.js', '@grapecity/wijmo.grid.selector': 'npm:@grapecity/wijmo.grid.selector/index.js', '@grapecity/wijmo.grid.cellmaker': 'npm:@grapecity/wijmo.grid.cellmaker/index.js', '@grapecity/wijmo.nav': 'npm:@grapecity/wijmo.nav/index.js', '@grapecity/wijmo.odata': 'npm:@grapecity/wijmo.odata/index.js', '@grapecity/wijmo.olap': 'npm:@grapecity/wijmo.olap/index.js', '@grapecity/wijmo.pdf': 'npm:@grapecity/wijmo.pdf/index.js', '@grapecity/wijmo.viewer': 'npm:@grapecity/wijmo.viewer/index.js', '@grapecity/wijmo.xlsx': 'npm:@grapecity/wijmo.xlsx/index.js', '@grapecity/wijmo.undo': 'npm:@grapecity/wijmo.undo/index.js', '@grapecity/wijmo.interop.grid': 'npm:@grapecity/wijmo.interop.grid/index.js', 'jszip': 'npm:jszip/dist/jszip.js', 'bootstrap.css': 'npm:bootstrap/dist/css/bootstrap.min.css', 'css': 'npm:systemjs-plugin-css/css.js', 'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js', 'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.js' }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'js' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);