React File Uploader - Async Upload

In this demo, the FileUploader component is configured for asynchronous upload. Use the File types drop-down menu to select acceptable file types for the Open file dialog. The Upload mode drop-down menu allows you to specify whether the file is uploaded on a button click or instantly after the file has been selected. In addition, you can specify whether the FileUploader allows multiple file selection.

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TS JS

Backend API

import React, { useCallback, useState } from 'react'; import FileUploader, { FileUploaderTypes } from 'devextreme-react/file-uploader'; import SelectBox, { SelectBoxTypes } from 'devextreme-react/select-box'; import CheckBox, { CheckBoxTypes } from 'devextreme-react/check-box'; const uploadModes = ['instantly', 'useButtons']; const fileTypeLabel = { 'aria-label': 'File Type' }; const uploadModeLabel = { 'aria-label': 'Mode' }; const fileTypesSource = [ { name: 'All types', value: '*' }, { name: 'Images', value: 'image/*' }, { name: 'Videos', value: 'video/*' }, ]; export default function App() { const [multiple, setMultiple] = useState(false); const [uploadMode, setUploadMode] = useState<FileUploaderTypes.Properties['uploadMode']>('instantly'); const [accept, setAccept] = useState('*'); const [selectedFiles, setSelectedFiles] = useState([]); const onSelectedFilesChanged = useCallback((e: FileUploaderTypes.ValueChangedEvent) => { setSelectedFiles(e.value); }, [setSelectedFiles]); const onAcceptChanged = useCallback((e: SelectBoxTypes.ValueChangedEvent) => { setAccept(e.value); }, [setAccept]); const onUploadModeChanged = useCallback((e: SelectBoxTypes.ValueChangedEvent) => { setUploadMode(e.value); }, [setUploadMode]); const onMultipleChanged = useCallback((e: CheckBoxTypes.ValueChangedEvent) => { setMultiple(e.value); }, [setMultiple]); return ( <div> <div className="widget-container"> <FileUploader multiple={multiple} accept={accept} uploadMode={uploadMode} uploadUrl="https://js.devexpress.com/Demos/NetCore/FileUploader/Upload" onValueChanged={onSelectedFilesChanged} /> <div className="content" style={{ display: selectedFiles.length > 0 ? 'block' : 'none' }}> <div> <h4>Selected Files</h4> {selectedFiles.map((file, i) => ( <div className="selected-item" key={i}> <span>{`Name: ${file.name}`}<br /></span> <span>{`Size ${file.size}`}<br /></span> <span>{`Type ${file.type}`}<br /></span> <span>{`Last Modified Date: ${file.lastModifiedDate}`}</span> </div> ))} </div> </div> </div> <div className="options"> <div className="caption">Options</div> <div className="option"> <span>File types</span> <SelectBox dataSource={fileTypesSource} inputAttr={fileTypeLabel} valueExpr="value" displayExpr="name" defaultValue="*" onValueChanged={onAcceptChanged} /> </div> <div className="option"> <span>Upload mode</span> <SelectBox items={uploadModes} defaultValue="instantly" inputAttr={uploadModeLabel} onValueChanged={onUploadModeChanged} /> </div> <div className="option"> <CheckBox text="Allow multiple files selection" onValueChanged={onMultipleChanged} /> </div> </div> </div> ); }

import React, { useCallback, useState } from 'react'; import FileUploader from 'devextreme-react/file-uploader'; import SelectBox from 'devextreme-react/select-box'; import CheckBox from 'devextreme-react/check-box'; const uploadModes = ['instantly', 'useButtons']; const fileTypeLabel = { 'aria-label': 'File Type' }; const uploadModeLabel = { 'aria-label': 'Mode' }; const fileTypesSource = [ { name: 'All types', value: '*' }, { name: 'Images', value: 'image/*' }, { name: 'Videos', value: 'video/*' }, ]; export default function App() { const [multiple, setMultiple] = useState(false); const [uploadMode, setUploadMode] = useState('instantly'); const [accept, setAccept] = useState('*'); const [selectedFiles, setSelectedFiles] = useState([]); const onSelectedFilesChanged = useCallback( (e) => { setSelectedFiles(e.value); }, [setSelectedFiles], ); const onAcceptChanged = useCallback( (e) => { setAccept(e.value); }, [setAccept], ); const onUploadModeChanged = useCallback( (e) => { setUploadMode(e.value); }, [setUploadMode], ); const onMultipleChanged = useCallback( (e) => { setMultiple(e.value); }, [setMultiple], ); return ( <div> <div className="widget-container"> <FileUploader multiple={multiple} accept={accept} uploadMode={uploadMode} uploadUrl="https://js.devexpress.com/Demos/NetCore/FileUploader/Upload" onValueChanged={onSelectedFilesChanged} /> <div className="content" style={{ display: selectedFiles.length > 0 ? 'block' : 'none' }} > <div> <h4>Selected Files</h4> {selectedFiles.map((file, i) => ( <div className="selected-item" key={i} > <span> {`Name: ${file.name}`} <br /> </span> <span> {`Size ${file.size}`} <br /> </span> <span> {`Type ${file.type}`} <br /> </span> <span>{`Last Modified Date: ${file.lastModifiedDate}`}</span> </div> ))} </div> </div> </div> <div className="options"> <div className="caption">Options</div> <div className="option"> <span>File types</span> <SelectBox dataSource={fileTypesSource} inputAttr={fileTypeLabel} valueExpr="value" displayExpr="name" defaultValue="*" onValueChanged={onAcceptChanged} /> </div> <div className="option"> <span>Upload mode</span> <SelectBox items={uploadModes} defaultValue="instantly" inputAttr={uploadModeLabel} onValueChanged={onUploadModeChanged} /> </div> <div className="option"> <CheckBox text="Allow multiple files selection" onValueChanged={onMultipleChanged} /> </div> </div> </div> ); }

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.tsx'; ReactDOM.render( <App />, document.getElementById('app'), );

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/24.1.7/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>

.widget-container { margin-right: 320px; } .content h4 { margin-bottom: 10px; font-weight: 500; font-size: 18px; } .content { margin-top: 50px; margin-left: 10px; display: none; } .selected-item { margin-bottom: 20px; } .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); position: absolute; right: 0; top: 0; bottom: 0; width: 260px; } .caption { font-size: 18px; font-weight: 500; } .option { margin-top: 10px; }

To select files, click the Select file button or drop the files directly on the component. If the upload mode is «useButtons», you must click the Upload button or a corresponding button for each file to initiate upload.

NOTE

This demo does not actually upload files. To upload files, assign the URL of a page providing server scenarios for saving uploaded files to the uploadUrl configuration property of the component.