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Data Grid

SignalR Service

Documentation

This example demonstrates real-time data update in the DataGrid widget bound to a SignalR server. Note that data used in this demo is for demonstration purposes only.

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import React from 'react'; import DataGrid, { Column } from 'devextreme-react/data-grid'; import CustomStore from 'devextreme/data/custom_store'; import { HubConnectionBuilder } from '@aspnet/signalr'; import PriceCell from './PriceCell.js'; import ChangeCell from './ChangeCell.js'; class App extends React.Component { constructor(props) { super(props); this.state = { connectionStarted: false, dataSource: null }; var hubConnection = new HubConnectionBuilder() .withUrl('https://js.devexpress.com/Demos/NetCore/liveUpdateSignalRHub') .build(); var store = new CustomStore({ load: () => hubConnection.invoke('getAllStocks'), key: 'symbol' }); hubConnection .start() .then(() => { hubConnection.on('updateStockPrice', (data) => { store.push([{ type: 'update', key: data.symbol, data: data }]); }); this.setState({ connectionStarted: true, dataSource: store }); }); } render() { return ( <div> {this.state.connectionStarted && (<DataGrid id={'gridContainer'} dataSource={this.state.dataSource} showBorders={true} repaintChangesOnly={true} highlightChanges={true} > <Column dataField={'lastUpdate'} dataType={'date'} width={115} format={'longTime'} /> <Column dataField={'symbol'} /> <Column dataField={'price'} dataType={'number'} format={'#0.####'} cellRender={PriceCell} /> <Column dataField={'change'} dataType={'number'} width={140} format={'#0.####'} cellRender={ChangeCell} /> <Column dataField={'dayOpen'} dataType={'number'} format={'#0.####'} /> <Column dataField={'dayMin'} dataType={'number'} format={'#0.####'} /> <Column dataField={'dayMax'} dataType={'number'} format={'#0.####'} /> </DataGrid>) } </div> ); } } export default App;
import React from 'react'; export default function ChangeCell(cell) { return ( <div className={cell.data.change > 0 ? 'inc' : 'dec' }> <span className={'current-value'}>{cell.text}</span> <span className={'arrow'}></span> <span className={'diff'}>{cell.data.percentChange.toFixed(2)}%</span> </div> ); }
import React from 'react'; export default function DiscountCell(cell) { return ( <div className={cell.data.change > 0 ? 'inc' : 'dec' }> <span>{cell.text}</span> </div> ); }
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render( <App />, document.getElementById('app') );
<!DOCTYPE html> <html> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/19.1.3/css/dx.light.css" /> <link rel="stylesheet" type ="text/css" href ="styles.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import('./index.js'); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>
#gridContainer span.current-value { display: inline-block; margin-right: 5px; } #gridContainer span.diff { width: 50px; display: inline-block; } #gridContainer .inc { color: #2ab71b; } #gridContainer .dec { color: #f00; } #gridContainer .inc .arrow, #gridContainer .dec .arrow { display: inline-block; height: 10px; width: 10px; background-repeat: no-repeat; background-size: 10px 10px; } #gridContainer .inc .arrow { background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAADKSURBVHjaYtTaLs1ABEiG0nPRJa56PEHhsxBhmCUQT4OyrwHxcXyKmQgYJgHE64CYDYrXQcXIMhCbAcgWkGzgNKh38QUB0QamIUUErkhKI9ZAGyCeTERkTYaqxWsgKA2txhdG6GGsvUNGGpeBRMUiGhCFGsqGzUBQQJsxkA5AemaiG5hDIBIIgQSgK0FmMDACs549kN5FZLjhA7+A2A2U9YSAOBeLAk4gnoBDczoOcSFGPIUDPxB/wCHHiKtwYGKgMhg1cBAaCBBgAJTUIL3ToPZfAAAAAElFTkSuQmCC'); } #gridContainer .dec .arrow { background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAABGdBTUEAAK/INwWK6QAAABl0RVh0U29mdHdhcmUAQWRvYmUgSW1hZ2VSZWFkeXHJZTwAAADJSURBVHjaYvzPgBfgkhYA4o8QFahKmBioDEYNHIQGsgBxIBCLkqgvAYi/g1mMjMjir0EJzR6If/6HpChKMMgMe3DKBeIcKhiY8x/MYoDj+RQYNgdkGLqBbEB8kgzDToL1YjEQhKWB+BUJhj0H64Eahs1AELYhMpJ+gtUiGYbLQBBOI8LANLBaIg1kAAc0vkiAqSPBQFAkHcNi2DGoHMkGgrAENOCRI0ECRQ2JBoKwJTQCfkLZDPgMZPxPXN5NhtJzMSsJVBMAAgwAyWSY2svfmrwAAAAASUVORK5CYII='); }
System.config({ transpiler: 'plugin-babel', paths: { 'npm:': 'https://unpkg.com/' }, defaultExtension: 'js', map: { 'react': 'npm:react@16/umd/react.development.js', 'react-dom': 'npm:react-dom@16/umd/react-dom.development.js', 'prop-types': 'npm:prop-types/prop-types.js', 'devextreme': 'npm:devextreme@19.1', 'devextreme-react': 'npm:devextreme-react@19.1', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.6/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js', 'tslib': 'npm:tslib@1.6.1', '@aspnet/signalr': 'npm:@aspnet/signalr@1.0.0/dist/cjs/index.js', }, packages: { 'devextreme': { defaultExtension: 'js' }, 'devextreme-react': { main: 'index.js' } }, babelOptions: { sourceMaps: false, stage0: true, react: true } });