CollectionView Paging

The CollectionView class supports client-side paging by default, but you can also use server-side paging using the ODataCollectionView class for OData data sources. This sample demonstrates client-side and server-side paging.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; // import * as wijmo from '@grapecity/wijmo'; import * as grid from '@grapecity/wijmo.grid'; import * as odata from '@grapecity/wijmo.odata'; // import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create a CollectionView with 20 items per page let view = new wijmo.CollectionView(getData(), { pageSize: 6, pageChanged: updateCurrentPage }); // // update pager status view.onPageChanged(); function updateCurrentPage() { let curr = wijmo.format('Page {index:n0} of {cnt:n0}', { index: view.pageIndex + 1, cnt: view.pageCount }); document.querySelector('#spanCurrent').textContent = curr; } // // implement pager document.querySelector('#pager').addEventListener('click', e => { let btn = wijmo.closest(e.target, 'button'), id = btn ? btn.id : ''; // switch (id) { case 'btnFirst': view.moveToFirstPage(); break; case 'btnPrev': view.moveToPreviousPage(); break; case 'btnNext': view.moveToNextPage(); break; case 'btnLast': view.moveToLastPage(); break; } }); // // show the data in a grid let flex = new grid.FlexGrid('#theGrid', { itemsSource: view, alternatingRowStep: 0, headersVisibility: 'Column' }); // // use ODataCollectionView to demonstrate server-based paging let odataView = new odata.ODataCollectionView('https://services.odata.org/Northwind/Northwind.svc', 'Customers', { pageSize: 6, pageOnServer: true, sortOnServer: true, pageChanged: updateCurrentPageOd, loaded: updateCurrentPageOd }); // // update pager status odataView.onPageChanged(); function updateCurrentPageOd() { let curr = wijmo.format('Page {index:n0} of {cnt:n0}', { index: odataView.pageIndex + 1, cnt: odataView.pageCount }); document.querySelector('#spanCurrentOd').textContent = curr; } // // implement pager document.querySelector('#pagerOd').addEventListener('click', e => { let btn = wijmo.closest(e.target, 'button'), id = btn ? btn.id : ''; // switch (id) { case 'btnFirstOd': odataView.moveToFirstPage(); break; case 'btnPrevOd': odataView.moveToPreviousPage(); break; case 'btnNextOd': odataView.moveToNextPage(); break; case 'btnLastOd': odataView.moveToLastPage(); break; } }); // // show the OData in a grid let odataFlex = new grid.FlexGrid('#theGridOd', { itemsSource: odataView, alternatingRowStep: 0, headersVisibility: 'Column', isReadOnly: true // the Northwind sample service is read-only! }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity CollectionView Paging</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"> <h4> Client-Side Paging: </h4> <div id="theGrid"> </div> <div id="pager"> <button id="btnFirst" class="btn"><span class="wj-glyph-step-backward"></span></button> <button id="btnPrev" class="btn"><span class="wj-glyph-left"></span></button> &nbsp;&nbsp;&nbsp;<span id="spanCurrent"></span>&nbsp;&nbsp;&nbsp; <button id="btnNext" class="btn"><span class="wj-glyph-right"></span></button> <button id="btnLast" class="btn"><span class="wj-glyph-step-forward"></span></button> </div> <br /> <h4> Server-Side Paging: </h4> <div id="theGridOd"> </div> <div id="pagerOd"> <button id="btnFirstOd" class="btn"><span class="wj-glyph-step-backward"></span></button> <button id="btnPrevOd" class="btn"><span class="wj-glyph-left"></span></button> &nbsp;&nbsp;&nbsp;<span id="spanCurrentOd"></span>&nbsp;&nbsp;&nbsp; <button id="btnNextOd" class="btn"><span class="wj-glyph-right"></span></button> <button id="btnLastOd" class="btn"><span class="wj-glyph-step-forward"></span></button> </div> </div> </body> </html>
export function getData() { let countries = ['US', 'Germany', 'UK', 'Japan', 'Italy', 'Greece', 'Spain', 'Portugal', 'Australia'], data = []; // for (let i = 0; i < countries.length; i++) { data.push({ id: i, country: countries[i], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } // return data; }
(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);