Ionic: อ่าน JSON และตรวจสอบค่า JSON ที่รับมา

เตรียม JSON ด้วย PHP
สร้างไฟล์ json.php

<?php
 $data = [ 'name' => 'jack', 
           'email' => 'xxx@xxx.com', 
           'status' => 'success' ];

 header('Content-type: application/json');
 echo json_encode( $data );
?>

<?php

$data = [ 'name' => 'jack',

'email' => 'xxx@xxx.com',

'status' => 'success' ];

header('Content-type: application/json');

echo json_encode( $data );

เรียกใช้ HttpClientModule โดยการ
แก้ไขไฟล์ src/app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { ErrorHandler, NgModule } from '@angular/core';
import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';
import { SplashScreen } from '@ionic-native/splash-screen';
import { StatusBar } from '@ionic-native/status-bar';

import { MyApp } from './app.component';
import { HomePage } from '../pages/home/home';

import { HttpClientModule } from '@angular/common/http';

@NgModule({
  declarations: [
    MyApp,
    HomePage
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    IonicModule.forRoot(MyApp)
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    HomePage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    { provide: ErrorHandler, useClass: IonicErrorHandler }
  ]
})
export class AppModule { }

import { BrowserModule } from '@angular/platform-browser';

import { ErrorHandler, NgModule } from '@angular/core';

import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';

import { SplashScreen } from '@ionic-native/splash-screen';

import { StatusBar } from '@ionic-native/status-bar';

import { MyApp } from './app.component';

import { HomePage } from '../pages/home/home';

import { HttpClientModule } from '@angular/common/http';

@NgModule({

declarations: [

MyApp,

HomePage

imports: [

BrowserModule,

HttpClientModule,

IonicModule.forRoot(MyApp)

bootstrap: [IonicApp],

entryComponents: [

MyApp,

HomePage

providers: [

StatusBar,

SplashScreen,

{ provide: ErrorHandler, useClass: IonicErrorHandler }

]

})

export class AppModule { }

แก้ไขไฟล์ src/pages/home/home.html

<ion-header>
  <ion-navbar>
    <ion-title>
      Ionic Blank
    </ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>
  <p>{{ loginResult }}</p>
</ion-content>

<ion-header>

<ion-navbar>

<ion-title>

Ionic Blank

</ion-title>

</ion-navbar>

</ion-header>

<ion-content padding>

<p>{{ loginResult }}</p>

</ion-content>

แก้ไขไฟล์ src/pages/home/home.ts

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';

import { Observable } from 'rxjs/Observable';
import { HttpClient } from '@angular/common/http';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {

  films: Observable<any>;
  loginResult: string;

  constructor(public navCtrl: NavController,
    public httpClient: HttpClient) {
    this.films = this.httpClient.get('http://localhost/json.php');
    this.films.subscribe(data => {
      console.log('my data: ', data);

      if (data['status'] === 'success') {
        this.loginResult = 'OK';
      } else {
        this.loginResult = 'NO';
      }
    })
  }
}

import { Component } from '@angular/core';

import { NavController } from 'ionic-angular';

import { Observable } from 'rxjs/Observable';

import { HttpClient } from '@angular/common/http';

@Component({

selector: 'page-home',

templateUrl: 'home.html'

})

export class HomePage {

films: Observable<any>;

loginResult: string;

constructor(public navCtrl: NavController,

public httpClient: HttpClient) {

this.films = this.httpClient.get('http://localhost/json.php');

this.films.subscribe(data => {

console.log('my data: ', data);

if (data['status'] === 'success') {

this.loginResult = 'OK';

} else {

this.loginResult = 'NO';

}

})

}

ค่า status จาก JSON ที่รับมา ถ้ามีค่าเป็น success ก็แสดง OK แต่ถ้าไม่ใช่ก็แสดง NO

Phaisarn Sutheebanjard

blog.phaisarn.com

Ionic: อ่าน JSON และตรวจสอบค่า JSON ที่รับมา