TypeError: cannot create property 'validator' on line '[e-mail]' in setUpControl

Question

I am facing a problem in formGroup . First, based on the URL, I take some value and call the API to retrieve specific user data for the text before the field.

register.html

 <form [formGroup]="form" (ngSubmit)="onSubmit(form.value)" class="form-horizontal"> <div class="form-group row"> <label for="inputEmail3" class="col-sm-4 ">Username</label> <div class="col-sm-8"> <input [formControl]="email" type="text" class="form-control" id="inputEmail3" placeholder="Email Address" [readonly]="isReadOnly"> </div> </div> </form> 

register.component.ts

 import { Component } from '@angular/core'; import { FormGroup, AbstractControl, FormBuilder, Validators } from '@angular/forms'; import { Router, ActivatedRoute } from '@angular/router'; import { EmailValidator, EqualPasswordsValidator } from '../../theme/validators'; @Component({ selector: 'register', templateUrl: './register.html', }) export class Register { public form: FormGroup; public email: AbstractControl; public username: string; constructor(private registerService: RegisterService, fb: FormBuilder, private router: Router, private route: ActivatedRoute) { this.form = fb.group({ 'email': ['', Validators.compose([Validators.required])] .... etc.. }); this.email = this.form.controls['email']; this.registerService.getUser({ userId: "asdasd2123da2das" }).subscribe(posts => { if (posts) { var userObj = posts.json(); console.log("userObj : ", userObj.data); if (userObj.data && userObj.data[0].email) { this.email = this.username = userObj.data[0].email; // ouput : [e-mail] this.isReadOnly = true; this.router.navigateByUrl('/register'); } else { alert("You are Not Autorize to access this Page"); this.router.navigateByUrl('/login'); } } }); } } 

Error Details:

 TypeError: Cannot create property 'validator' on string '[e-mail]' at setUpControl (http://localhost:3004/vendor.dll.js:9739:23) at FormControlDirective.ngOnChanges (http://localhost:3004/vendor.dll.js:44196:89) at Wrapper_FormControlDirective.ngDoCheck (/ReactiveFormsModule/FormControlDirective/wrapper.ngfactory.js:50:18) 

Answer 1

 <form [formGroup]="form" (ngSubmit)="onSubmit(form.value)" class="form-horizontal"> <div class="form-group row"> <label for="inputEmail3" class="col-sm-4 ">Username</label> <div class="col-sm-8"> <input formControlName="email" type="text" class="form-control" id="inputEmail3" placeholder="Email Address" [readonly]="isReadOnly"> </div> </div> </form> 

try changing this [formControl] value to formControlName .

And to set the output in the input field, please do the following, specify the line this.form.patchValue

 import { Component } from '@angular/core'; import { FormGroup, AbstractControl, FormBuilder, Validators } from '@angular/forms'; import { Router, ActivatedRoute } from '@angular/router'; import { EmailValidator, EqualPasswordsValidator } from '../../theme/validators'; @Component({ selector: 'register', templateUrl: './register.html', }) export class Register { public form: FormGroup; public email: AbstractControl; public username: string; constructor(private registerService: RegisterService, fb: FormBuilder, private router: Router, private route: ActivatedRoute) { this.form = fb.group({ 'email': ['', Validators.compose([Validators.required])] .... etc.. }); this.email = this.form.controls['email']; this.registerService.getUser({ userId: "asdasd2123da2das" }).subscribe(posts => { if (posts) { var userObj = posts.json(); console.log("userObj : ", userObj.data); if (userObj.data && userObj.data[0].email) { this.email = this.username = userObj.data[0].email; // ouput : [e-mail] this.form.patchValue({ email : this.email }); this.isReadOnly = true; this.router.navigateByUrl('/register'); } else { alert("You are Not Autorize to access this Page"); this.router.navigateByUrl('/login'); } } });