Hi, I want to make validations to my project but i can not import FormBuilder, Validators, ControlGroup, Control.
I am getting following errors in console:
Errors:-
[default] /var/www/aaaa/angular2-seed/src/app/home/home.ts:22:13
Cannot find name 'ControlGroup'.

[default] /var/www/aaaa/angular2-seed/src/app/home/home.ts:24:27
Cannot find name 'FormBuilder'.

[default] /var/www/aaaa/angular2-seed/src/app/home/home.ts:26:26
Property 'formBuilder' does not exist on type 'Home'.

[default] /var/www/aaaa/angular2-seed/src/app/home/home.ts:27:23
Cannot find name 'Validators'.

[default] /var/www/aaaa/angular2-seed/src/app/home/home.ts:28:24
Cannot find name 'Validators'.

[default] /var/www/aaaa/angular2-seed/src/app/home/home.ts:28:45
Cannot find name 'Validators'.

I also attached my code here.

home.ts

import { Component, Input, trigger, state, style, transition, animate} from '@angular/core';
import {Http, Headers, RequestOptions, Response} from '@angular/http';
import { FormBuilder, Validators, ControlGroup, Control} from "@angular/common";

@component({
selector: 'home',
styleUrls: ['./home.css'],
templateUrl: './home.html'
})

export class Home {
public results;
loginForm: ControlGroup;

constructor(formBuilder: FormBuilder, private http:Http) {

this.loginForm = this.formBuilder.group({
  'username': ['', Validators.required],
  'password': ['', [Validators.required, Validators.minLength(3) ]]

});

}

login(event,username,userpassword) {
console.log(username);
}
}

home.html

< form class="login-form" [ngModelForm]="loginForm" [formGroup]="loginForm" *ngIf="ishidden1">
< h3 style="display:inline-block">< span class="glyphicon glyphicon-log-in" >< / h3 >
< h1 style="display:inline-block">Login< / h1 >
< input type="text" minlength="5" maxlength="8" required #username id="username" placeholder="username" ngControl="username" #username="ngForm" />
< input type="password" id="password" #password placeholder="password" ngControl="password" />
< button (click)="login($event,username.value,password.value)">login< /button>
< p class="message" (click)="clicked($event,false)">Not registered? < a href="#" class="message">Create an account< / a >< /p >
</ form>