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Chunk Uploading

This demo shows how to upload files in chunks. The chunkSize property 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 in the ASP.NET MVC version of this demo.

Backend API
import React, { useCallback, useState } from 'react'; import FileUploader, { FileUploaderTypes } from 'devextreme-react/file-uploader'; function getValueInKb(value: number) { return `${(value / 1024).toFixed(0)}kb`; } export default function App() { const [chunks, setChunks] = useState([]); const onUploadProgress = useCallback((e: FileUploaderTypes.ProgressEvent) => { const chunk = { segmentSize: e.segmentSize, bytesLoaded: e.bytesLoaded, bytesTotal: e.bytesTotal, }; setChunks([...chunks, chunk]); }, [chunks, setChunks]); const onUploadStarted = useCallback(() => { setChunks([]); }, [setChunks]); return ( <React.Fragment> <FileUploader name="file" accept="image/*" uploadUrl="https://js.devexpress.com/Demos/WidgetsGalleryDataService/api/ChunkUpload" chunkSize={200000} onUploadStarted={onUploadStarted} onProgress={onUploadProgress} /> <span className="note">Allowed file extensions: <span>.jpg, .jpeg, .gif, .png</span>.</span> <span className="note">Maximum file size: <span>4 MB.</span></span> <div className="chunk-panel"> { chunks.map((c, i) => ( <div key={i}> <span>Chunk size:</span> <span className="segment-size">{getValueInKb(c.segmentSize)}</span> <span>, Uploaded:</span> <span className="loaded-size">{getValueInKb(c.bytesLoaded)}</span> <span>/</span> <span className="total-size">{getValueInKb(c.bytesTotal)}</span> </div> )) } </div> </React.Fragment> ); }
import React, { useCallback, useState } from 'react'; import FileUploader from 'devextreme-react/file-uploader'; function getValueInKb(value) { return `${(value / 1024).toFixed(0)}kb`; } export default function App() { const [chunks, setChunks] = useState([]); const onUploadProgress = useCallback( (e) => { const chunk = { segmentSize: e.segmentSize, bytesLoaded: e.bytesLoaded, bytesTotal: e.bytesTotal, }; setChunks([...chunks, chunk]); }, [chunks, setChunks], ); const onUploadStarted = useCallback(() => { setChunks([]); }, [setChunks]); return ( <React.Fragment> <FileUploader name="file" accept="image/*" uploadUrl="https://js.devexpress.com/Demos/WidgetsGalleryDataService/api/ChunkUpload" chunkSize={200000} onUploadStarted={onUploadStarted} onProgress={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"> {chunks.map((c, i) => ( <div key={i}> <span>Chunk size:</span> <span className="segment-size">{getValueInKb(c.segmentSize)}</span> <span>, Uploaded:</span> <span className="loaded-size">{getValueInKb(c.bytesLoaded)}</span> <span>/</span> <span className="total-size">{getValueInKb(c.bytesTotal)}</span> </div> ))} </div> </React.Fragment> ); }
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );
window.exports = window.exports || {}; window.config = { transpiler: 'ts', typescriptOptions: { module: 'system', emitDecoratorMetadata: true, experimentalDecorators: true, jsx: 'react', }, meta: { 'react': { 'esModule': true, }, 'typescript': { 'exports': 'ts', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, }, paths: { 'npm:': 'https://unpkg.com/', }, defaultExtension: 'js', map: { 'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.js', 'react': 'npm:react@17.0.2/umd/react.development.js', 'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js', 'prop-types': 'npm:prop-types@15.8.1/prop-types.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@24.1.3/cjs', 'devextreme-react': 'npm:devextreme-react@24.1.3/cjs', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.8/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', 'devextreme-cldr-data': 'npm:devextreme-cldr-data@1.0.3', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'devextreme': { defaultExtension: 'js', }, 'devextreme-react': { main: 'index.js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/localization/messages': { format: 'json', defaultExtension: 'json', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.13/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, react: true, }, }; System.config(window.config);
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html> <html lang="en"> <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=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/24.1.3/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://unpkg.com/core-js@2.6.12/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.tsx"); </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; color: var(--dx-color-primary); } .total-size { color: var(--dx-color-primary); } .note { display: block; font-size: 10pt; color: #484848; margin-left: 9px; } .note > span { font-weight: 700; }