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File Uploader

Chunk Uploading

This demo shows how to upload files in chunks. The chunkSize option specifies their size (in this case, 0.2MB). You should ensure the server can process chunks. See an example of the server implementation under the FileUploaderController tab of the ASP.NET MVC version of this demo.

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import React from 'react'; import { FileUploader } from 'devextreme-react'; class App extends React.Component { constructor(props) { super(props); this.state = { chunks: [] }; this.onUploadProgress = this.onUploadProgress.bind(this); this.onUploadStarted = this.onUploadStarted.bind(this); } render() { return ( <React.Fragment> <FileUploader name={'file'} accept={'image/*'} uploadUrl={'https://js.devexpress.com/Demos/WidgetsGalleryDataService/api/ChunkUpload'} chunkSize={200000} onUploadStarted={this.onUploadStarted} onProgress={this.onUploadProgress} /> <span className={'note'}>Allowed file extensions: <span>.jpg, .jpeg, .gif, .png</span>.</span> <span className={'note'}>Maximum file size: <span>4 MB.</span></span> <div className={'chunk-panel'}> { this.state.chunks.map((c, i) => { return <div key={i}> <span>Chunk size:</span> <span className={'segment-size dx-theme-accent-as-text-color'}>{this.getValueInKb(c.segmentSize)}</span> <span>, Uploaded:</span> <span className={'loaded-size dx-theme-accent-as-text-color'}>{this.getValueInKb(c.bytesLoaded)}</span> <span>/</span> <span className={'total-size dx-theme-accent-as-text-color'}>{this.getValueInKb(c.bytesTotal)}</span> </div>; }) } </div> </React.Fragment> ); } onUploadProgress(e) { const chunk = { segmentSize: e.segmentSize, bytesLoaded: e.bytesLoaded, bytesTotal: e.bytesTotal }; this.setState({ chunks: [...this.state.chunks, chunk] }); } onUploadStarted() { this.setState({ chunks: [] }); } getValueInKb(value) { return `${(value / 1024).toFixed(0)}kb`; } } export default App;
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/19.1.7/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.7/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>
.chunk-panel { width: 505px; height: 165px; overflow-y: auto; padding: 18px; margin-top: 40px; background-color: rgba(191, 191, 191, 0.15); } .segment-size, .loaded-size { margin-left: 3px; } .note { display: block; font-size: 10pt; color: #484848; margin-left: 9px; } .note > span { font-weight: 700 }
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@1.3.7/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' }, packages: { 'devextreme': { defaultExtension: 'js' }, 'devextreme-react': { main: 'index.js' } }, babelOptions: { sourceMaps: false, stage0: true, react: true } });