angular的hero例子（5）

route的使用

ng generate module app-routing –flat –module=app
ng generate component dashboard

代码：
heroes.component.ts

import { Component, OnInit } from '@angular/core';import { Hero } from '../hero';import { HeroService } from '../hero.service';@Component({  selector: 'app-heroes',  templateUrl: './heroes.component.html',  styleUrls: ['./heroes.component.css']})export class HeroesComponent implements OnInit {  heroes: Hero[];  constructor(private heroService: HeroService) { }  ngOnInit() {    this.getHeroes();  }  getHeroes(): void {    this.heroService.getHeroes()    .subscribe(heroes => this.heroes = heroes);  }}

heroes.component.html

<h2>My Heroes</h2><ul class="heroes">  <li *ngFor="let hero of heroes">    <a routerLink="/detail/{{hero.id}}">      <span class="badge">{{hero.id}}</span> {{hero.name}}    </a>  </li></ul>

app.component.html

<h1>{{title}}</h1><app-heroes></app-heroes><app-messages></app-messages>

app.component.ts

<h1>{{title}}</h1><nav>  <a routerLink="/dashboard">Dashboard</a>  <a routerLink="/heroes">Heroes</a></nav><router-outlet></router-outlet><app-messages></app-messages>

app.component.css

h1 {  font-size: 1.2em;  color: #999;  margin-bottom: 0;}h2 {  font-size: 2em;  margin-top: 0;  padding-top: 0;}nav a {  padding: 5px 10px;  text-decoration: none;  margin-top: 10px;  display: inline-block;  background-color: #eee;  border-radius: 4px;}nav a:visited, a:link {  color: #607D8B;}nav a:hover {  color: #039be5;  background-color: #CFD8DC;}nav a.active {  color: #039be5;}

app.module.ts

import { NgModule }       from '@angular/core';import { BrowserModule }  from '@angular/platform-browser';import { FormsModule }    from '@angular/forms';import { AppComponent }         from './app.component';import { DashboardComponent }   from './dashboard/dashboard.component';import { HeroDetailComponent }  from './hero-detail/hero-detail.component';import { HeroesComponent }      from './heroes/heroes.component';import { HeroService }          from './hero.service';import { MessageService }       from './message.service';import { MessagesComponent }    from './messages/messages.component';import { AppRoutingModule }     from './app-routing.module';@NgModule({  imports: [    BrowserModule,    FormsModule,    AppRoutingModule  ],  declarations: [    AppComponent,    DashboardComponent,    HeroesComponent,    HeroDetailComponent,    MessagesComponent  ],  providers: [ HeroService, MessageService ],  bootstrap: [ AppComponent ]})export class AppModule { }

hero.ts

export class Hero {  id: number;  name: string;}

mock-heroes.ts

/** * Created by gmy on 2017/12/4. */import { Hero } from './hero';export const HEROES: Hero[] = [  { id: 11, name: 'Mr. Nice' },  { id: 12, name: 'Narco' },  { id: 13, name: 'Bombasto' },  { id: 14, name: 'Celeritas' },  { id: 15, name: 'Magneta' },  { id: 16, name: 'RubberMan' },  { id: 17, name: 'Dynama' },  { id: 18, name: 'Dr IQ' },  { id: 19, name: 'Magma' },  { id: 20, name: 'Tornado' }];

heroes.component.css

.heroes {  margin: 0 0 2em 0;  list-style-type: none;  padding: 0;  width: 15em;}.heroes li {  position: relative;  cursor: pointer;  background-color: #EEE;  margin: .5em;  padding: .3em 0;  height: 1.6em;  border-radius: 4px;}.heroes li:hover {  color: #607D8B;  background-color: #DDD;  left: .1em;}.heroes a {  color: #888;  text-decoration: none;  position: relative;  display: block;  width: 250px;}.heroes a:hover {  color:#607D8B;}.heroes .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;  min-width: 16px;  text-align: right;  margin-right: .8em;  border-radius: 4px 0 0 4px;}

hero-detail.component.ts

import { Component, OnInit, Input } from '@angular/core';import { ActivatedRoute } from '@angular/router';import { Location } from '@angular/common';import { Hero }         from '../hero';import { HeroService }  from '../hero.service';@Component({  selector: 'app-hero-detail',  templateUrl: './hero-detail.component.html',  styleUrls: [ './hero-detail.component.css' ]})export class HeroDetailComponent implements OnInit {  @Input() hero: Hero;  constructor(    private route: ActivatedRoute,    private heroService: HeroService,    private location: Location  ) {}  ngOnInit(): void {    this.getHero();  }  getHero(): void {    const id = +this.route.snapshot.paramMap.get('id');    this.heroService.getHero(id)      .subscribe(hero => this.hero = hero);  }  goBack(): void {    this.location.back();  }}

hero-detail.component.html

<div *ngIf="hero">  <h2>{{ hero.name | uppercase }} Details</h2>  <div><span>id: </span>{{hero.id}}</div>  <div>    <label>name:      <input [(ngModel)]="hero.name" placeholder="name"/>    </label>  </div>  <button (click)="goBack()">go back</button></div>

hero.service.ts

import { Injectable } from '@angular/core';import { Observable } from 'rxjs/Observable';import { of } from 'rxjs/observable/of';import { Hero } from './hero';import { HEROES } from './mock-heroes';import { MessageService } from './message.service';@Injectable()export class HeroService {  constructor(private messageService: MessageService) { }  getHeroes(): Observable<Hero[]> {    // Todo: send the message _after_ fetching the heroes    this.messageService.add('HeroService: fetched heroes');    return of(HEROES);  }}

message.service.ts

import { Injectable } from '@angular/core';import { Observable } from 'rxjs/Observable';import { of } from 'rxjs/observable/of';import { Hero } from './hero';import { HEROES } from './mock-heroes';import { MessageService } from './message.service';@Injectable()export class HeroService {  constructor(private messageService: MessageService) { }  getHeroes(): Observable<Hero[]> {    // Todo: send the message _after_ fetching the heroes    this.messageService.add('HeroService: fetched heroes');    return of(HEROES);  }  getHero(id: number): Observable<Hero> {    // Todo: send the message _after_ fetching the hero    this.messageService.add(`HeroService: fetched hero id=${id}`);    return of(HEROES.find(hero => hero.id === id));  }}

message.component.ts

import { Component, OnInit } from '@angular/core';import { MessageService } from '../message.service';@Component({  selector: 'app-messages',  templateUrl: './messages.component.html',  styleUrls: ['./messages.component.css']})export class MessagesComponent implements OnInit {  constructor(public messageService: MessageService) {}  ngOnInit() {  }}

message.component.html

<div *ngIf="messageService.messages.length">  <h2>Messages</h2>  <button class="clear"          (click)="messageService.clear()">clear</button>  <div *ngFor='let message of messageService.messages'> {{message}} </div></div>

message.component.css

h2 {  color: red;  font-family: Arial, Helvetica, sans-serif;  font-weight: lighter;}body {  margin: 2em;}body, input[text], button {  color: crimson;  font-family: Cambria, Georgia;}button.clear {  font-family: Arial;  background-color: #eee;  border: none;  padding: 5px 10px;  border-radius: 4px;  cursor: pointer;  cursor: hand;}button:hover {  background-color: #cfd8dc;}button:disabled {  background-color: #eee;  color: #aaa;  cursor: auto;}button.clear {  color: #888;  margin-bottom: 12px;}

app-routing.module.ts

import { NgModule }             from '@angular/core';import { RouterModule, Routes } from '@angular/router';import { DashboardComponent }   from './dashboard/dashboard.component';import { HeroesComponent }      from './heroes/heroes.component';import { HeroDetailComponent }  from './hero-detail/hero-detail.component';const routes: Routes = [  { path: '', redirectTo: '/dashboard', pathMatch: 'full' },  { path: 'dashboard', component: DashboardComponent },  { path: 'detail/:id', component: HeroDetailComponent },  { path: 'heroes', component: HeroesComponent }];@NgModule({  imports: [ RouterModule.forRoot(routes) ],  exports: [ RouterModule ]})export class AppRoutingModule {}

dashboard.component.html

<h3>Top Heroes</h3><div class="grid grid-pad">  <a *ngFor="let hero of heroes" class="col-1-4"      routerLink="/detail/{{hero.id}}">    <div class="module hero">      <h4>{{hero.name}}</h4>    </div>  </a></div>

dashboard.component.ts

import { Component, OnInit } from '@angular/core';import { Hero } from '../hero';import { HeroService } from '../hero.service';@Component({  selector: 'app-dashboard',  templateUrl: './dashboard.component.html',  styleUrls: [ './dashboard.component.css' ]})export class DashboardComponent implements OnInit {  heroes: Hero[] = [];  constructor(private heroService: HeroService) { }  ngOnInit() {    this.getHeroes();  }  getHeroes(): void {    this.heroService.getHeroes()      .subscribe(heroes => this.heroes = heroes.slice(1, 5));  }}

dashboard.component.css

[class*='col-'] {  float: left;  padding-right: 20px;  padding-bottom: 20px;}[class*='col-']:last-of-type {  padding-right: 0;}a {  text-decoration: none;}*, *:after, *:before {  -webkit-box-sizing: border-box;  -moz-box-sizing: border-box;  box-sizing: border-box;}h3 {  text-align: center; margin-bottom: 0;}h4 {  position: relative;}.grid {  margin: 0;}.col-1-4 {  width: 25%;}.module {  padding: 20px;  text-align: center;  color: #eee;  max-height: 120px;  min-width: 120px;  background-color: #607D8B;  border-radius: 2px;}.module:hover {  background-color: #EEE;  cursor: pointer;  color: #607d8b;}.grid-pad {  padding: 10px 0;}.grid-pad > [class*='col-']:last-of-type {  padding-right: 20px;}@media (max-width: 600px) {  .module {    font-size: 10px;    max-height: 75px; }}@media (max-width: 1024px) {  .grid {    margin: 0;  }  .module {    min-width: 60px;  }}

hero-detail.component.css

label {  display: inline-block;  width: 3em;  margin: .5em 0;  color: #607D8B;  font-weight: bold;}input {  height: 2em;  font-size: 1em;  padding-left: .4em;}button {  margin-top: 20px;  font-family: Arial;  background-color: #eee;  border: none;  padding: 5px 10px;  border-radius: 4px;  cursor: pointer; cursor: hand;}button:hover {  background-color: #cfd8dc;}button:disabled {  background-color: #eee;  color: #ccc;  cursor: auto;}