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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<dx-file-uploader
name="file"
accept="image/*"
uploadUrl="https://js.devexpress.com/Demos/WidgetsGalleryDataService/api/ChunkUpload"
[chunkSize]="200000"
(onUploadStarted)="onUploadStarted($event)"
(onProgress)="onUploadProgress($event)">
</dx-file-uploader>
<span class="note">Allowed file extensions: <span>.jpg, .jpeg, .gif, .png</span>.</span>
<span class="note">Maximum file size: <span>4 MB.</span></span>
<div class="chunk-panel">
</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 {
onUploadStarted(e) {
this.getChunkPanel().innerHTML = '';
}
onUploadProgress(e) {
this.getChunkPanel().appendChild(this.addChunkInfo(e.segmentSize, e.bytesLoaded, e.bytesTotal));
}
addChunkInfo(segmentSize, loaded, total) {
var result = document.createElement("DIV");
result.appendChild(this.createSpan("Chunk size:"));
result.appendChild(this.createSpan(this.getValueInKb(segmentSize), 'segment-size'));
result.appendChild(this.createSpan(", Uploaded:"));
result.appendChild(this.createSpan(this.getValueInKb(loaded), 'loaded-size'));
result.appendChild(this.createSpan("/"));
result.appendChild(this.createSpan(this.getValueInKb(total), 'total-size'));
return result;
}
getValueInKb(value) {
return (value / 1024).toFixed(0) + "kb";
}
createSpan(text, className = null) {
var result = document.createElement("SPAN");
if (className)
result.className = className + " dx-theme-accent-as-text-color";
result.innerText = text;
return result;
}
getChunkPanel() {
return document.querySelector('.chunk-panel');
}
}
@NgModule({
imports: [
BrowserModule,
DxFileUploaderModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep .chunk-panel {
width: 505px;
height: 165px;
overflow-y: auto;
padding: 18px;
margin-top: 40px;
background-color: rgba(191, 191, 191, 0.15);
}
::ng-deep .segment-size,
::ng-deep .loaded-size {
margin-left: 3px;
}
::ng-deep .note {
display: block;
font-size: 10pt;
color: #484848;
margin-left: 9px;
}
::ng-deep .note > span {
font-weight: 700
}
// 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@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@3.4.5/lib/typescript.js',
'@angular/core': 'npm:@angular/core@8.0.0/bundles/core.umd.js',
'@angular/common': 'npm:@angular/common@8.0.0/bundles/common.umd.js',
'@angular/compiler': 'npm:@angular/compiler@8.0.0/bundles/compiler.umd.js',
'@angular/platform-browser': 'npm:@angular/platform-browser@8.0.0/bundles/platform-browser.umd.js',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@8.0.0/bundles/platform-browser-dynamic.umd.js',
'@angular/router': 'npm:@angular/router@8.0.0/bundles/router.umd.js',
'@angular/forms': 'npm:@angular/forms@8.0.0/bundles/forms.umd.js',
'@angular/common/http': 'npm:@angular/common@8.0.0/bundles/common-http.umd.js',
'tslib': 'npm:tslib/tslib.js',
'rxjs': 'npm:rxjs@6.3.3',
'rxjs/operators': 'npm:rxjs@6.3.3/operators',
'devextreme': 'npm:devextreme@19.1',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.6/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram',
'devextreme-angular': 'npm:devextreme-angular@19.1'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'rxjs': { main: 'index.js', defaultExtension: 'js' },
'rxjs/operators': { main: 'index.js', 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/19.1.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.4/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/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>