Getting Started with the Kendo UI for Angular Upload

The Upload helps users send files from their file systems to dedicated server handlers which are configured to receive them.

Basic Usage

The following example demonstrates the Upload in action.

import { Component } from '@angular/core';

@Component({
  selector: 'my-upload',
  template: `
  <kendo-upload
    [saveUrl]="uploadSaveUrl"
    [removeUrl]="uploadRemoveUrl">
  </kendo-upload>
  `
})
export class UploadComponent {
  uploadSaveUrl = 'saveUrl'; // should represent an actual API endpoint
  uploadRemoveUrl = 'removeUrl'; // should represent an actual API endpoint
}

import { Component, Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent, HttpProgressEvent, HttpEventType, HttpResponse } from '@angular/common/http';
import { Observable, of, concat } from 'rxjs';
import { delay } from 'rxjs/operators';

@Component({
    selector: 'my-app',
    template: `<my-upload></my-upload>`
})
export class AppComponent {
}

/*
  Mocked backend service.
  For further details, check
  https://angular.io/guide/http#writing-an-interceptor
*/

@Injectable()
export class UploadInterceptor implements HttpInterceptor {
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    if (req.url === 'saveUrl') {
      const events: Observable<HttpEvent<any>>[] = [0, 30, 60, 100].map((x) => of(<HttpProgressEvent>{
        type: HttpEventType.UploadProgress,
        loaded: x,
        total: 100
      }).pipe(delay(1000)));

      const success = of(new HttpResponse({ status: 200 })).pipe(delay(1000));
      events.push(success);

      return concat(...events);
    }

    if (req.url === 'removeUrl') {
        return of(new HttpResponse({ status: 200 }));
    }

    return next.handle(req);
  }
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { UploadModule } from '@progress/kendo-angular-upload';
import { UploadComponent } from './upload.component';
import { UploadInterceptor } from './app.component';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';


import { AppComponent } from './app.component';

@NgModule({
    imports:      [ BrowserModule, HttpClientModule, UploadModule, BrowserAnimationsModule, FormsModule, ReactiveFormsModule ],
    declarations: [ AppComponent, UploadComponent ],
    bootstrap:    [ AppComponent ],
    providers: [
      {
        provide: HTTP_INTERCEPTORS,
        useClass: UploadInterceptor,
        multi: true
      }
    ]
  })

  export class AppModule { }
import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app.module';

enableProdMode();

const platform = platformBrowserDynamic();
platform.bootstrapModule(AppModule);

Functionality and Features

Events

The following example demonstrates basic Upload events.

import { Component } from '@angular/core';
import { FileRestrictions, SelectEvent, RemoveEvent } from '@progress/kendo-angular-upload';

@Component({
  selector: 'my-upload',
  styles: [`
    >>> .img-preview {
      position: relative;
      padding: 10px;
      top: 20px;
    }

    >>> event-log {
      position: relative;
      top: 20px;
    }
  `],
  template: `
      <kendo-upload
        [autoUpload]="false"
        [saveUrl]="uploadSaveUrl"
        [removeUrl]="uploadRemoveUrl"
        [restrictions]="uploadRestrictions"
        (select)="selectEventHandler($event)"
        (clear)="clearEventHandler($event)"
        (remove)="removeEventHandler($event)"
        (complete)="completeEventHandler($event)">
      </kendo-upload>

      <event-log title="Event log" [events]="events"></event-log>

      <div *ngIf="imagePreviews.length" class="img-preview example-config">
        <h3>Preview selected images</h3>
        <img *ngFor="let image of imagePreviews"
          [src]="image.src"
          alt="image preview"
          style="width: 200px; margin: 10px;" />
      </div>
  `
})
export class UploadComponent {
  public events: string[] = [];
  public imagePreviews: any[] = [];
  public uploadRestrictions: FileRestrictions = {
    allowedExtensions: ['.jpg', '.png']
  };

  public uploadSaveUrl = 'saveUrl'; // should represent an actual API endpoint
  public uploadRemoveUrl = 'removeUrl'; // should represent an actual API endpoint

  public clearEventHandler(): void {
    this.log('Clearing the file upload');
    this.imagePreviews = [];
  }

  public completeEventHandler() {
    this.log(`All files processed`);
  }

  public removeEventHandler(e: RemoveEvent): void {
    this.log(`Removing ${e.files[0].name}`);

    const index = this.imagePreviews.findIndex(item => item.uid === e.files[0].uid);

    if (index >= 0) {
      this.imagePreviews.splice(index, 1);
    }
  }

  public selectEventHandler(e: SelectEvent): void {
    const that = this;

    e.files.forEach((file) => {
      that.log(`File selected: ${file.name}`);

      if (!file.validationErrors) {
        const reader = new FileReader();

        reader.onload = function (ev) {
          const image = {
            src: ev.target['result'],
            uid: file.uid
          };

          that.imagePreviews.unshift(image);
        };

        reader.readAsDataURL(file.rawFile);
      }
    });
  }

  private log(event: string): void {
    this.events.unshift(`${event}`);
  }
}
import { Component, Input } from '@angular/core';

@Component({
  selector: 'event-log',
  template: `
    <div class="example-config">
      <h5>{{ title }}</h5>
      <ul class="event-log">
        <li *ngFor="let event of events">{{ event }}</li>
      </ul>
    </div>
  `
})
export class EventLogComponent {
  @Input() title: string;
  @Input() events: string[];
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { UploadModule } from '@progress/kendo-angular-upload';
import { UploadInterceptor } from './app.component';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

import { AppComponent } from './app.component';
import { UploadComponent } from './upload.component';
import { EventLogComponent } from './event-log.component';

@NgModule({
  imports:      [ BrowserModule, HttpClientModule, UploadModule, BrowserAnimationsModule ],
  declarations: [ AppComponent, EventLogComponent, UploadComponent ],
  bootstrap:    [ AppComponent ],
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: UploadInterceptor,
      multi: true
    }
  ]
})

export class AppModule { }
import { Component, Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent, HttpProgressEvent, HttpEventType, HttpResponse } from '@angular/common/http';
import { Observable, of, concat } from 'rxjs';
import { delay } from 'rxjs/operators';

@Component({
    selector: 'my-app',
    template: `<my-upload></my-upload>`
})
export class AppComponent {
}

/*
  Mocked backend service.
  For further details, check
  https://angular.io/guide/http#writing-an-interceptor
*/

@Injectable()
export class UploadInterceptor implements HttpInterceptor {
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    if (req.url === 'saveUrl') {
      const events: Observable<HttpEvent<any>>[] = [0, 30, 60, 100].map((x) => of(<HttpProgressEvent>{
        type: HttpEventType.UploadProgress,
        loaded: x,
        total: 100
      }).pipe(delay(1000)));

      const success = of(new HttpResponse({ status: 200 })).pipe(delay(1000));
      events.push(success);

      return concat(...events);
    }

    if (req.url === 'removeUrl') {
        return of(new HttpResponse({ status: 200 }));
    }

    return next.handle(req);
  }
}
import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app.module';

enableProdMode();

const platform = platformBrowserDynamic();
platform.bootstrapModule(AppModule);

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