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FileUploader

Validation

This demo shows how to use the allowedFileExtensions and maxFileSize options to limit the maximum size and specify file extensions that the FileUploader accepts. Note that demonstrated validation is client-side — you should implement the server-side validation. You can see an example under the FileUploaderController tab in the ASP.NET MVC version of this demo.

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<div class="main-block"> <div class="file-uploader-block"> <dx-file-uploader multiple="true" uploadMode="useButtons" [allowedFileExtensions]="['.jpg', '.jpeg', '.gif', '.png']"> </dx-file-uploader> <span class="note">Allowed file extensions: <span>.jpg, .jpeg, .gif, .png</span>.</span> </div> <div class="file-uploader-block" style="float: right"> <dx-file-uploader multiple="true" uploadMode="useButtons" maxFileSize="4000000"> </dx-file-uploader> <span class="note">Maximum file size: <span>4 MB</span>.</span> </div> </div>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxFileUploaderModule } from 'devextreme-angular'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'] }) export class AppComponent { } @NgModule({ imports: [ BrowserModule, DxFileUploaderModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep .file-uploader-block { width: 350px; float: left; } ::ng-deep .note { font-size: 10pt; color: #484848; margin-left: 9px; } ::ng-deep .note > span { font-weight: 700 } ::ng-deep .main-block { max-width: 900px; min-width: 700px; }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // https://github.com/DevExpress/devextreme-angular/blob/master/README.md System.config({ transpiler: 'ts', typescriptOptions: { module: "commonjs", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@7.0.6/lib/plugin.js', 'typescript': 'npm:typescript@2.2.2/lib/typescript.js', '@angular/core': 'npm:@angular/core@5.1.2/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@5.1.2/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@5.1.2/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@5.1.2/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@5.1.2/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@5.1.2/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@5.1.2/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@5.1.2/bundles/forms.umd.js', '@angular/common/http': 'npm:@angular/common@5.1.2/bundles/common-http.umd.js', 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs@5.3.1', 'devextreme': 'npm:devextreme@18.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.6/dist/quill.js', 'quill-delta-to-html': 'npm:quill-delta-to-html@0.10.4/dist/browser/QuillDeltaToHtmlConverter.bundle.js', 'devextreme-angular': 'npm:devextreme-angular@18.2' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme-angular': { main: 'index.js', defaultExtension: 'js' } } });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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/18.2.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/18.2.3/css/dx.light.css" /> <link rel="dx-theme" data-theme="android5.light" href="https://cdn3.devexpress.com/jslib/18.2.3/css/dx.android5.light.css" /> <link rel="dx-theme" data-theme="ios7.default" href="https://cdn3.devexpress.com/jslib/18.2.3/css/dx.ios7.default.css" /> <link rel="dx-theme" data-theme="win10.black" href="https://cdn3.devexpress.com/jslib/18.2.3/css/dx.win10.black.css" /> <link rel="dx-theme" data-theme="win10.white" href="https://cdn3.devexpress.com/jslib/18.2.3/css/dx.win10.white.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.6.25/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>