Dynamically add formControlName for controls in ionic

Hi all,
I am working in ionic3 and angular 4 js. I created dynamic textbox based on a loop count. Now I want to validate the controls. How can I give formControlName for the dynamic controls. Please help me…


What have you tried so far and how did it not meet your expectations?

Than you for the response…

In my html I used the code
" <li *ngFor=“let item of createRange(10)”>
<ion-input type=“text” placeholder=“ccc” [formGroupName]=“item” >


and in ts file
" createRange(number){
var items: number[] = [];
for(var i = 1; i <= number; i++){
return items;

How can I set the formGroupName for validation?

This is exactly what I want too.
I am very new to the ionic as well as angular (or for that matter, javascript too). I am trying to build a messaging app which will have surveys and polls which user will answer.
I followed this tutorial to get single option forms and succeded but the problem is that whenever I press submit button on one survey, all surverys are submitted obviously because all forms have same formControlName. I tried following angular docs on dynamic forms but couldn’t get any clues out of it. Please help if possible. Thank you.


Try this in ts page

addNewRow() {
// control refers to your formarray
const control = this.form.controls[‘itemRows’];
// add new formgroup

and in html page

          <div class="form-group">
             <ion-datetime displayFormat="HH:mm" [(ngModel)]="fromtoday[i]" formControlName="itemname"></ion-datetime>
          </div>        <button class="icona" ion-button icon-only *ngIf="form.controls.itemRows.controls.length >1" (click)="deleteRow(i)">