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File Uploader

Custom Drop Zone

The FileUploader widget supports the drag-and-drop functionality to upload files.

In this demo, the dropZone option specifies the HTML element in which you can drag and drop files for upload. The dropZoneEnter and dropZoneLeave events allow you to customize the drop zone when the mouse pointer enters and leaves this zone while dragging the file.

NOTE
Allowed file extensions: .jpg, .jpeg, .gif, .png
Maximum file size: 4 MB

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<template> <div class="widget-container flex-box"> <span>Profile Picture</span> <div id="dropzone-external" class="flex-box" :class="[isDropZoneActive ? 'dx-theme-accent-as-border-color dropzone-active' : 'dx-theme-border-color']" > <img id="dropzone-image" :src="imageSource" v-if="imageSource" alt="" > <div id="dropzone-text" class="flex-box" v-if="textVisible" > <span>Drag & Drop the desired file</span> <span>…or click to browse for a file instead.</span> </div> <DxProgressBar id="upload-progress" :min="0" :max="100" width="30%" :show-status="false" :visible="progressVisible" :value="progressValue" /> </div> <DxFileUploader id="file-uploader" dialog-trigger="#dropzone-external" drop-zone="#dropzone-external" :multiple="false" :allowed-file-extensions="allowedFileExtensions" upload-mode="instantly" upload-url="https://js.devexpress.com/Demos/NetCore/FileUploader/Upload" :visible="false" @drop-zone-enter="onDropZoneEnter" @drop-zone-leave="onDropZoneLeave" @uploaded="onUploaded" @progress="onProgress" @upload-started="onUploadStarted" /> </div> </template> <script> import { DxFileUploader } from 'devextreme-vue/file-uploader'; import { DxProgressBar } from 'devextreme-vue/progress-bar'; export default { components: { DxFileUploader, DxProgressBar }, data() { return { isDropZoneActive: false, imageSource: '', textVisible: true, progressVisible: false, progressValue: 0, allowedFileExtensions: ['.jpg', '.jpeg', '.gif', '.png'] }; }, methods: { onDropZoneEnter(e) { if(e.dropZoneElement.id === 'dropzone-external') { this.isDropZoneActive = true; } }, onDropZoneLeave(e) { if(e.dropZoneElement.id === 'dropzone-external') { this.isDropZoneActive = false; } }, onUploaded(e) { const file = e.file; const fileReader = new FileReader(); fileReader.onload = () => { this.isDropZoneActive = false; this.imageSource = fileReader.result; }; fileReader.readAsDataURL(file); this.textVisible = false; this.progressVisible = false; this.progressValue = 0; }, onProgress(e) { this.progressValue = e.bytesLoaded / e.bytesTotal * 100; }, onUploadStarted() { this.imageSource = ''; this.progressVisible = true; } } }; </script> <style> #dropzone-external { width: 350px; height: 350px; background-color: rgba(183, 183, 183, 0.1); border-width: 2px; border-style: dashed; padding: 10px; } #dropzone-external > * { pointer-events: none; } #dropzone-external.dropzone-active { border-style: solid; } .widget-container > span { font-size: 22px; font-weight: bold; margin-bottom: 16px; } #dropzone-image { max-width: 100%; max-height: 100%; } #dropzone-text > span { font-weight: 100; opacity: 0.5; } #upload-progress { display: flex; margin-top: 10px; } .flex-box { display: flex; flex-direction: column; justify-content: center; align-items: center; } </style>
import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#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/20.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/css/dx.light.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>
System.config({ transpiler: 'plugin-babel', meta: { '*.vue': { loader: 'vue-loader' }, }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'vue': 'npm:vue@3.0.0/dist/vue.esm-browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@1.0.15/index.js', 'mitt': 'npm:mitt/dist/mitt.umd.js', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@20.2.4', 'devextreme-vue': 'npm:devextreme-vue@20.2.4', 'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.5/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.8/dist/dx-gantt.js', 'preact': 'npm:preact@10.5.7/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.7/hooks/dist/hooks.js', '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' }, packages: { 'devextreme-vue': { main: 'index.js' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js' } }, babelOptions: { sourceMaps: false, stage0: true } });