Ionic 2 Form with ngModel

You call the editprofile() function without any parameter, so the value will be undefined, maybe try this
(ngSubmit)="editprofile(form)", and then I would use value.fullname instead, plus a submit button is enough for you, that will call your function which is in (ngSubmit) so don’t create a new click event.

Btw check the [https://ionicframework.com/docs/developer-resources/forms/](Forms with Templates) section.