Angular Select Dropdown with Reactive Form

By Hardik Savani | March 12, 2020 | Category : Angular


Here, i will show you angular select dropdown with reactive form example. if you have question about angular select box example then i will give simple example with solution. Here you will learn select dropdown in angular. Here you will learn bind select dropdown list in angular. Follow bellow tutorial step of dropdown selection change event in angular.

You can easily use this example with angular 6, angular 7, angular 8 and angular 9.

Here, i will give you two example to get value of selected select box by click on submit button and another get select dropdown box value in on change value. so we will take "websiteList" variable and create dropdown using it. let's see both example one by one.

You need to follow bellow step to add form validation in angular 9.

Example 1: Get Selected DropDown Value on Form Submit

Step 1: Import FormsModule

If you want to create form in angular app then you need to import FormsModule from @angular/forms library. so let's add following code to app.module.ts file.

src/app/app.module.ts

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

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

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

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

@NgModule({

declarations: [

AppComponent

],

imports: [

BrowserModule,

FormsModule,

ReactiveFormsModule

],

providers: [],

bootstrap: [AppComponent]

})

export class AppModule { }

Step 2: Form with ngModel

In this step, we will write code of html form with ngModel. so add following code to app.component.html file.

I used bootstrap class on this form. if you want to add than then follow this link too: Install Boorstrap 4 to Angular 9.

src/app/app.component.html

<div class="container">

<h1>Angular Select Dropdown Example - ItSolutionStuff.com</h1>

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

<div class="form-group">

<label for="website">Website:</label>

<select formControlName="website" class="form-control">

<option disabled>Select Website</option>

<option>Choose Website</option>

<option *ngFor="let web of websiteList">{{web}}</option>

</select>

<div *ngIf="f.website.touched && f.website.invalid" class="alert alert-danger">

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

</div>

</div>

<button class="btn btn-primary" type="submit" [disabled]="!form.valid">Submit</button>

</form>

</div>

Step 3: updated Ts File

In ts file. we will write submit() and get all input fields values. so let's add following code to app.component.ts file.

src/app/app.component.ts

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

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

@Component({

selector: 'app-root',

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

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

})

export class AppComponent {

websiteList: any = ['ItSolutionStuff.com', 'HDTuto.com', 'Nicesnippets.com']

form = new FormGroup({

website: new FormControl('', Validators.required)

});

get f(){

return this.form.controls;

}

submit(){

console.log(this.form.value);

}

}

Now you can run your application using following command:

ng serve

Example 2: Get Selected DropDown Value on Change Event

Step 1: Import FormsModule

If you want to create form in angular app then you need to import FormsModule from @angular/forms library. so let's add following code to app.module.ts file.

src/app/app.module.ts

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

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

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

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

@NgModule({

declarations: [

AppComponent

],

imports: [

BrowserModule,

FormsModule,

ReactiveFormsModule

],

providers: [],

bootstrap: [AppComponent]

})

export class AppModule { }

Step 2: Form with ngModel

In this step, we will write code of html form with ngModel. so add following code to app.component.html file.

I used bootstrap class on this form. if you want to add than then follow this link too: Install Boorstrap 4 to Angular 9.

src/app/app.component.html

<div class="container">

<h1>Angular Select Dropdown Example - ItSolutionStuff.com</h1>

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

<div class="form-group">

<label for="website">Website:</label>

<select formControlName="website" class="form-control" (change)="changeWebsite($event)">

<option disabled>Select Website</option>

<option>Choose Website</option>

<option *ngFor="let web of websiteList">{{web}}</option>

</select>

<div *ngIf="f.website.touched && f.website.invalid" class="alert alert-danger">

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

</div>

</div>

<button class="btn btn-primary" type="submit" [disabled]="!form.valid">Submit</button>

</form>

</div>

Step 3: updated Ts File

In ts file. we will write submit() and get all input fields values. so let's add following code to app.component.ts file.

src/app/app.component.ts

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

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

@Component({

selector: 'app-root',

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

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

})

export class AppComponent {

websiteList: any = ['ItSolutionStuff.com', 'HDTuto.com', 'Nicesnippets.com']

form = new FormGroup({

website: new FormControl('', Validators.required)

});

get f(){

return this.form.controls;

}

submit(){

console.log(this.form.value);

}

changeWebsite(e) {

console.log(e.target.value);

}

}

Now you can run your application using following command:

ng serve

You can see output:

I hope it can help you...




Hardik Savani
My name is Hardik Savani. I'm a full-stack developer, entrepreneur and owner of Aatman Infotech. I live in India and I love to write tutorials and tips that can help to other artisan. I am a big fan of PHP, Javascript, JQuery, Laravel, Codeigniter, VueJS, AngularJS and Bootstrap from the early stage.
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