Angular 8 Image Upload with Preview

Angular 8 Image Upload with Preview

In this post we will give you information about Angular 8 Image Upload with Preview. Hear we will give you detail about Angular 8 Image Upload with PreviewAnd how to use it also give you demo for it if it is necessary.

In this example, i want to share with you how to image upload with preview in angular 8. we will see example of angular 8 reactive form image upload. we will use reactive form with image upload in angular 8 step by step. i also created api for store image in folder using php for angular 8 image upload.

Here, we will simple create reactive form using formGroup. input file onchange event we will add image to another formgroup element. then after click on submit button we will call web api for store that image to server.

I written step by step image uploading with angular 8 application, also created web services using php. so let’s follow bellowing step and get preview like as bellow:

Step 1: Create New App

You can easily create your angular app using bellow command:

ng new my-new-app


Step 2: Import Module

In this step, we need to import HttpClientModule, FormsModule and ReactiveFormsModule to app.module.ts file. so let’s import it as like bellow:

src/app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';

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

import { HttpClientModule } from '@angular/common/http';

import { FormsModule, ReactiveFormsModule } from '@angular/forms';



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



@NgModule({

  declarations: [

    AppComponent

  ],

  imports: [

    BrowserModule,

    HttpClientModule,

    FormsModule,

    ReactiveFormsModule

  ],

  providers: [],

  bootstrap: [AppComponent]

})

export class AppModule { }


Step 3: Updated View File

Now here, we will updated our html file. we will create simple reactive form with input file element and image tag for preview.

In this file i used bootstrap 4 class, if you want to use bootstrap then you can follow this link: Install Bootstrap 4 in Angular 8

so let’s put bellow code:

src/app/app.component.html

<h1>Angular 8 Image Upload with Preview - ItSolutionStuff.com</h1>



<form [formGroup]="myForm" (ngSubmit)="submit()">



    <div >

        <label for="name">Name</label>

        <input 

            formControlName="name"

            id="name" 

            type="text" 

            >

        <div *ngIf="f.name.touched && f.name.invalid" >

            <div *ngIf="f.name.errors.required">Name is required.</div>

            <div *ngIf="f.name.errors.minlength">Name should be 3 character.</div>

        </div>

    </div>



    <div >

        <label for="file">File</label>

        <input 

            formControlName="file"

            id="file" 

            type="file" 



            (change)="onFileChange($event)">

        <div *ngIf="f.file.touched && f.file.invalid" >

            <div *ngIf="f.file.errors.required">File is required.</div>

        </div>

    </div>



    <img [src]="imageSrc" *ngIf="imageSrc" style="height: 300px; width:500px">



    <button  type="submit">Submit</button>

</form>


Step 4: Use Component ts File

Now we need to update our component.ts file with formGroup and formControl element.

i used my local api file url ‘http://localhost:8001/upload.php’, you can use your api there.

so, let’s update as like bellow:

src/app/app.component.ts

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

import { HttpClient } from '@angular/common/http';

import { FormGroup, FormControl, Validators} from '@angular/forms';



@Component({

  selector: 'app-root',

  templateUrl: './app.component.html',

  styleUrls: ['./app.component.css']

})

export class AppComponent {



   imageSrc: string;



   myForm = new FormGroup({

    name: new FormControl('', [Validators.required, Validators.minLength(3)]),

    file: new FormControl('', [Validators.required]),

    fileSource: new FormControl('', [Validators.required])

  });



  constructor(private http: HttpClient) { }



  get f(){

    return this.myForm.controls;

  }



  onFileChange(event) {

    const reader = new FileReader();



    if(event.target.files && event.target.files.length) {

      const [file] = event.target.files;

      reader.readAsDataURL(file);



      reader.onload = () => {



        this.imageSrc = reader.result as string;



        this.myForm.patchValue({

          fileSource: reader.result

        });



      };



    }

  }



  submit(){

    console.log(this.myForm.value);

    this.http.post('http://localhost:8001/upload.php', this.myForm.value)

      .subscribe(res => {

        console.log(res);

        alert('Uploaded Successfully.');

      })

  }



}


Now we are ready to run our example, we will create api file using php. so you can create update.php file with “upload” folder and run with different port and call it. so let’s create upload.php file as like bellow:

upload.php

<?php



    header("Access-Control-Allow-Origin: *");

    header("Access-Control-Allow-Methods: PUT, GET, POST");

    header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");



    $folderPath = "upload/";

    $postdata = file_get_contents("php://input");

    $request = json_decode($postdata);



    $image_parts = explode(";base64,", $request->fileSource);



    $image_type_aux = explode("image/", $image_parts[0]);



    $image_type = $image_type_aux[1];



    $image_base64 = base64_decode($image_parts[1]);



    $file = $folderPath . uniqid() . '.png';



    file_put_contents($file, $image_base64);



?>


Now we are ready to run both:

Run Angular App:

ng serve


Run PHP API:

php -S localhost:8001


Now you can run and check it.

I hope it can help you…

Hope this code and post will helped you for implement Angular 8 Image Upload with Preview. if you need any help or any feedback give it in comment section or you have good idea about this post you can give it comment section. Your comment will help us for help you more and improve us. we will give you this type of more interesting post in featured also so, For more interesting post and code Keep reading our blogs

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