Show data using Angular 2

Raj Kumar
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Article

To know about basics and how to getting started with Angular 2, Please read this article first and add mandatory files and npm_modules.

· Angular 2 - Getting Started

Getting Started

· Start Visual Studio

· Create a new website

· Provide the name and the location of website

· Click "Next".

Once all files are added and npm_modules installed, now let’s work on how to show data.

First of all, add a new component and make some properties with data type.

export class Article {
constructor(
public Id: Number,
public Title: string,
public Summary: string
) { }
}

Add a new component and give references for CSS and HTML like this.

First add some data in article array.

import { Component } from '@angular/core';
import { Article } from '../shared/article';
const ARTICLES: Article[] = [
{ Id: 1, Title: 'Angular 2 - Getting Started', Summary: 'In this article, you will learn how to start working with Angular 2.' },
{ Id: 2, Title: 'How to detect image Faces and make Blur using Cognitive Face API with .NET Core', Summary: 'In this article, you will learn how to detect total faces and image and make them Blur using Cognitive Face API with .NET Core.' },
{ Id: 3, Title: 'Getting Started With Microsoft Project 2016', Summary: 'In this article, you will learn how to getting started with Microsoft Project 2016 from scratch.' },
{ Id: 4, Title: 'Get Image Attributes using Cognitive Services face API in WPF', Summary: 'In this article you will learn how to get the image attributes like Age, Gender using Cognitive Services face API in WPF.' },
{ Id: 5, Title: 'Cognitive Services face API in WPF', Summary: 'In this article, I will explain how to use Cognitive Services face API in WPF.' }
];

@Component({
selector: 'article-app',
templateUrl: './app/article/article.component.html',
styleUrls: ['./app/styles/styles.css']
})
export class ArticleComponent {
debugger;
title = 'Top 5 Articles';
articles = ARTICLES;
selectedArticle: Article;
onSelect(article: Article): void {
this.selectedArticle = article;
}
}

Now add a new HTML page and CSS.

HTML:

<div>
<h3>{{title}}</h3>
<ul class="articles">
<li *ngFor="let article of articles"
[class.selected]="article === selectedArticle"
(click)="onSelect(article)">
<span class="badge">{{article.Id}}</span> {{article.Title}}
</li>
</ul>
</div>

CSS:

.articles {
margin: 0 0 2em 0;
list-style-type: none;
padding: 0;
width: 50em;
}
.articles li {
cursor: pointer;
position: relative;
left: 0;
background-color: #EEE;
margin: .5em;
padding: .3em 0;
height: 2em;
border-radius: 4px;
}
.articles li.selected:hover {
background-color: #BBD8DC !important;
color: white;
}
.articles li:hover {
color: #607D8B;
background-color: #DDD;
left: .1em;
}
.articles .text {
position: relative;
top: -3px;
}
.articles .badge {
display: inline-block;
font-size: small;
color: white;
padding: 0.8em 0.7em 0 0.7em;
background-color: #607D8B;
line-height: 1em;
position: relative;
left: -1px;
top: -4px;
height: 1.8em;
margin-right: .8em;
border-radius: 4px 0 0 4px;
}

Now add references of components on Module:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { ArticleComponent } from './article/article.component';
import { ArticleDetailComponent } from './article/article-detail.component';
@NgModule({
imports: [BrowserModule, FormsModule, HttpModule],
declarations: [ArticleComponent, ArticleDetailComponent],
providers: [],
bootstrap: [ ArticleComponent, ArticleDetailComponent]
})
export class AppModule { };

Now add component and other refrences on Index.html

<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<link href="app/styles/styles.css" rel="stylesheet" />
<script src="node_modules/core-js/client/shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="systemjs.config.js"></script>
<script>
System.import('app').catch(
function (err)
{ console.error(err); });
</script>
</head>
<body>
<header class="navbar navbar-inner navbar-fixed-top">
<nav class="container">
<div class="navbar-header">
<span class="app-title">My Latest Articles</span>
</div>
</nav>
</header>
<main class="container">
<article-app>Loading...</article-app>
</main>
</body>
</html>

Now run the application:

Conclusion

In this article, we have learnt how to display data in Angular 2. In next article, I will show how to display article summary when click on article title. If you have any question or comments, then drop me a line in C# Corner comments section.

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