ionic2 Modals Modal with Parameters on dismiss:


Example

We now know how to create a modal. But what if we want to pass some data from modal to our home page. To do so, let us look into an example with modal as Register page passing parameters to parent page.

Register.html

<ion-header>
  <ion-toolbar>
    <ion-title>
      Login
    </ion-title>
    <ion-buttons start>
      <button (click)="dismiss()">
        <span primary showWhen="ios">Cancel</span>
        <ion-icon name="md-close" showWhen="android,windows"></ion-icon>
      </button>
    </ion-buttons>
  </ion-toolbar>
</ion-header>
<ion-content padding>
  <ion-list>
    <ion-item>
      <ion-label>Name</ion-label>
      <ion-input type="text" [(ngModel)]="name"></ion-input>
    </ion-item>
    <ion-item>
      <ion-label>Email</ion-label>
      <ion-input type="text" [(ngModel)]="email"></ion-input>
    </ion-item>
    <ion-item>
      <ion-label>Mobile</ion-label>
      <ion-input type="number" [(ngModel)]="mobile"></ion-input>
    </ion-item>
    <ion-item>
      <ion-label>Nickname</ion-label>
      <ion-input type="text" [(ngModel)]="nickname"></ion-input>
    </ion-item>
  </ion-list>
  <button full (click)="add()">Add</button>
</ion-content>

Register.ts

import { Component } from '@angular/core';
import { ViewController } from 'ionic-angular';
@Component({
  templateUrl: 'build/pages/register/register.html',
})
export class ResisterPage {
  viewCtrl;
  name;
  email;
  mobile;
  nickname;
  constructor(viewCtrl: ViewController) {
    this.viewCtrl = viewCtrl;
    this.name = "";
    this.email = "";
    this.mobile = "";
    this.nickname = "";
  }
  dismiss(){
    this.viewCtrl.dismiss();
  }
  add(){
    let data = {"name": this.name, "email": this.email, "mobile": this.mobile, "nickname": this.nickname};
    this.viewCtrl.dismiss(data);
  }
}

 Register modal gets data object with values entered by user and the parameters are passed to our current page on dismiss with viewControllers dismiss method. Now the parameters are sent.

 So how we are going to retrieve the parameters in home page? To do so, we are creating a button on home page and call Register modal on click. To display the user, we are displaying a list.

   Home.html

<ion-list>
  <ion-item *ngFor="let datum of data">
    <h1>{{datum.name}}</h1>
  </ion-item>
</ion-list>
<button full secondary (click)="openModalParams()">ModalWithParams-Register</button>

 Home.ts

import {ResisterPage} from '../register/register';

  openModalParams(){
    let modalWithParams = this.modalCtrl.create(ResisterPage);
    modalWithParams.present();

    modalWithParams.onDidDismiss((result) =>{
      if(result){
        this.data.unshift(result);
      }
    });
  }

ViewController onDidDismiss method gets executed whenever a modal is closed. If data is passed as parameter from modal, then we can retrieve it using onDidDismiss method. Here the data entered by user is appended to the existing data. If no data is passed as parameter, then the returned value will be null.