How to implement File Upload in Angular? (2024)

Step 1: Install Angular CLI and create a new project

You can install the angular CLI using this command.

npm install -g @angular/cli

You can create a new angular project using the following command.

ng new FileUploadDemo

You can use this command to run the project.

ng serve --open

Step 2: Add the HttpClientModule

You can import this module in the app.module.ts file.

import { BrowserModule } from '@angular/platform-browser';import { NgModule } from '@angular/core';import { AppRoutingModule } from './app-routing.module';import { AppComponent } from './app.component';import { HttpClientModule } from '@angular/common/http';@NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, AppRoutingModule, HttpClientModule ], providers: [], bootstrap: [ AppComponent ]})export class AppModule { }

Step 3: Create angular components

You can create components using the following command.

After running this command, angular CLI generates four files of this component and added in the declaration array in the app.module.ts file.

Step 4: Adding angular routing

After creating a component, you can add the routing in the app-routing.module.ts file. First, you need to import this component and then add the routes.

import { NgModule } from '@angular/core';import { Routes, RouterModule } from '@angular/router';import { AboutComponent } from './about/about.component';import { HomeComponent } from './home/home.component';const routes: Routes = [ { path: '', redirectTo: 'home', pathMatch: 'full' }, { path: 'home', component: HomeComponent }, { path: 'about', component: AboutComponent }, ];@NgModule({ imports: [RouterModule.forRoot(routes)], exports: [RouterModule]})export class AppRoutingModule { }

Step 5: Setting up angular material

You can use the following command to add angular material.

In the app.module.ts file, you can add the module.

import { BrowserModule } from '@angular/platform-browser';import { NgModule } from '@angular/core';import { AppRoutingModule } from './app-routing.module';import { AppComponent } from './app.component';import { HttpClientModule } from '@angular/common/http';import { HomeComponent } from './home/home.component';import { AboutComponent } from './about/about.component';import { BrowserAnimationsModule } from '@angular/platform-browser/animations';import { MatToolbarModule } from '@angular/material/toolbar';import { MatIconModule } from '@angular/material/icon';import { MatCardModule } from '@angular/material/card';import { MatButtonModule } from '@angular/material/button';import { MatProgressBarModule } from '@angular/material/progress-bar';@NgModule({ declarations: [ AppComponent, HomeComponent, AboutComponent ], imports: [ BrowserModule, AppRoutingModule, HttpClientModule, BrowserAnimationsModule, MatToolbarModule, MatCardModule, MatButtonModule, MatProgressBarModule, MatIconModule ], providers: [], bootstrap: [ AppComponent ]})export class AppModule { }

Step 6: Create file upload service

You can use the following command to generate a service.

In the UploadService.ts file, write the following code.

import { Injectable } from '@angular/core';import { HttpClient, HttpEvent, HttpErrorResponse, HttpEventType } from '@angular/common/http'; import { map } from 'rxjs/operators';@Injectable({ providedIn: 'root'})export class UploadService { SERVER_URL: string = "https://file.io/"; constructor( private httpClient: HttpClient ) { } public upload(formData) { return this.httpClient.post(this.SERVER_URL, formData, { reportProgress: true, observe: 'events' }); }}

Step 7:After creating the service, you need to define the upload method in the home.component.ts file

import { Component, OnInit, ViewChild, ElementRef } from '@angular/core';import { HttpEventType, HttpErrorResponse } from '@angular/common/http';import { of } from 'rxjs'; import { catchError, map } from 'rxjs/operators'; import { UploadService } from '../upload.service';@Component({ selector: 'app-home', templateUrl: './home.component.html', styleUrls: ['./home.component.scss']})export class HomeComponent implements OnInit { @ViewChild("fileUpload", {static: false}) fileUpload: ElementRef;files = []; constructor( private uploadService: UploadService ) { } ngOnInit(): void { } uploadFile(file) { const formData = new FormData(); formData.append('file', file.data); file.inProgress = true; this.uploadService.upload(formData).pipe( map(event => { switch (event.type) { case HttpEventType.UploadProgress: file.progress = Math.round(event.loaded * 100 / event.total); break; case HttpEventType.Response: return event; } }), catchError((error: HttpErrorResponse) => { file.inProgress = false; return of(`${file.data.name} upload failed.`); })).subscribe((event: any) => { if (typeof (event) === 'object') { console.log(event.body); } }); } private uploadFiles() { this.fileUpload.nativeElement.value = ''; this.files.forEach(file => { this.uploadFile(file); }); } onClick() { const fileUpload = this.fileUpload.nativeElement;fileUpload.onchange = () => { for ( let index = 0; index < fileUpload.files.length; index++) { const file = fileUpload.files[index]; this.files.push({ data: file, inProgress: false, progress: 0}); } this.uploadFiles(); }; fileUpload.click(); }}

Next, you need to create an HTML template. Add the following content in the home.component.html file.

Next, add the toolbar in the app.component.html file.

 ngImageUpload