使用angular4和asp.net core 2 web api做个练习项目(二), 这部分都是angular

上一篇: http://www.cnblogs.com/cgzl/p/7755801.html

完成client.service.ts:

import { Injectable } from '@angular/core';
import { Http, Headers } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import { ErrorHandler } from '@angular/core';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
import 'rxjs/add/observable/throw';import { Client } from '../models/Client';@Injectable()
export class ClientService {private url = 'http://localhost:5001/api/client';private headers = new Headers({ 'Content-Type': 'application/json' });constructor(private http: Http) { }getAll(): Observable<Client[]> {return this.http.get(this.url).map(response => response.json() as Client[]);}getOne(id: number): Observable<Client> {return this.http.get(`${this.url}/${id}`).map(response => response.json() as Client);}create(client: Client) {return this.http.post(this.url, JSON.stringify(client), { headers: this.headers }).map(response => response.json()).catch(this.handleError);}update(client: Client) {return this.http.patch(`${this.url}/${client.id}`, JSON.stringify(client), { headers: this.headers }).map(response => response.json()).catch(this.handleError);}delete(id: number) {return this.http.delete(`${this.url}/${id}`).map(response => response.json()).catch(this.handleError);}private handleError(error: Response) {if (error.status === 400) {return Observable.throw('Bad Request');}if (error.status === 404) {return Observable.throw('Not Found');}return Observable.throw('Error Occurred');}
}

我个人比较喜欢 observable的方式而不是promise.

然后再Client.Component里面, 注入ClientService, 在NgOnInit里面调用查询方法:

import { Component, OnInit } from '@angular/core';
import { ClientService } from '../../services/client.service';
import { Client } from '../../models/Client';@Component({selector: 'app-clients',templateUrl: './clients.component.html',styleUrls: ['./clients.component.css']
})
export class ClientsComponent implements OnInit {public clients: Client[];constructor(private service: ClientService) { }ngOnInit() {this.service.getAll().subscribe(clients => {this.clients = clients;console.log(this.clients);});}
}

然后修改Client.Component.html:

<table class="table table-striped" *ngIf="clients?.length > 0; else noClients"><thead class="thead-dark"><tr><th>ID</th><th>Name</th><th>Email</th><th>Balance</th><th></th></tr></thead><tbody><tr *ngFor="let client of clients"><td>{{client.id}}</td><td>{{client.firstName + ' ' + client.lastName}}</td><td>{{client.email}}</td><td>{{client.balance}}</td><td><a href="" class="btn btn-secondary btn-sm">明细</a></td></tr></tbody>
</table>
<ng-template #noClients><hr><h5>系统中没有客户..</h5>
</ng-template>

然后把client.component放在dashboard中:

dashboard.component.html:

<app-clients></app-clients>

然后看看浏览器:

我这里还没有数据, 如果有数据的话, 将会显示一个table, header是黑色的.

使用font-awesome

npm install font-awesome --save

然后打开.angular-cli.json:

      "styles": ["styles.css","../node_modules/bootstrap/dist/css/bootstrap.css","../node_modules/font-awesome/css/font-awesome.css"],"scripts": ["../node_modules/jquery/dist/jquery.js","../node_modules/tether/dist/js/tether.js","../node_modules/bootstrap/dist/js/bootstrap.bundle.js"]

重新运行ng serve

修改 client.component.html的明细按钮:

<td><a href="" class="btn btn-secondary btn-sm"><i class="fa fa-arrow-circle-o-right"></i> 明细</a></td>

然后还是使用swagger添加两条数据吧: http://localhost:5001/swagger, 现在的效果:

添加一个总计:

import { Component, OnInit } from '@angular/core';
import { ClientService } from '../../services/client.service';
import { Client } from '../../models/Client';@Component({selector: 'app-clients',templateUrl: './clients.component.html',styleUrls: ['./clients.component.css']
})
export class ClientsComponent implements OnInit {public clients: Client[];public total: number;constructor(private service: ClientService) { }ngOnInit() {this.service.getAll().subscribe(clients => {this.clients = clients;this.getTotal();});}getTotal() {this.total = this.clients.reduce((previous, current) => previous + current.balance, 0);}
}

html:

<div class="row"><div class="col-md-6"><h2><i class="fa fa-users">客户</i></h2></div><div class="col-md-6"><h5 class="pull-right text-muted">总计: {{total | currency:"USD":true}}</h5></div>
</div>
<table class="table table-striped" *ngIf="clients?.length > 0; else noClients"><thead class="thead-dark"><tr><th>ID</th><th>Name</th><th>Email</th><th>Balance</th><th></th></tr></thead><tbody><tr *ngFor="let client of clients"><td>{{client.id}}</td><td>{{client.firstName + ' ' + client.lastName}}</td><td>{{client.email}}</td><td>{{client.balance}}</td><td><a href="" class="btn btn-secondary btn-sm"><i class="fa fa-arrow-circle-o-right"></i> 明细</a></td></tr></tbody>
</table>
<ng-template #noClients><hr><h5>系统中没有客户..</h5>
</ng-template>

Sidebar 侧边栏

打开sidebar.component.html:

<a routerLink="/add-client" href="#" class="btn btn-success btn-block"><i class="fa fa-plus"></i>添加新客户</a>

然后再dashboard中添加sidebar:

<div class="row"><div class="col-md-10"><app-clients></app-clients></div><div class="col-md-2"><app-sidebar></app-sidebar></div>
</div>

添加在了右边. 效果如图:

然后需要在app.module.ts里面添加路由:

const appRoutes: Routes = [{ path: '', component: DashboardComponent },{ path: 'register', component: RegisterComponent },{ path: 'login', component: LoginComponent },{ path: 'add-client', component: AddClientComponent }
];

Add-Client 添加客户的表单:

打开add-client.component.html:

<div class="row"><div class="col-md-6"><a routerLink="/" href="#" class="btn btn-link"><i class="fa fa-arrow-circle-o-left"></i> 回到Dashboard </a></div><div class="col-md-6"></div>
</div><div class="card"><div class="card-header">Add Client</div><div class="card-body"><form #f="ngForm" (ngSubmit)="onSubmit(f)"><div class="form-group"><label for="firstName">名</label><input type="text" class="form-control" [(ngModel)]="client.firstName"name="firstName"#clientFirstName="ngModel"minlength="2"required><div *ngIf="clientFirstName.errors.required && clientFirstName.touched" class="alter alert-danger">名字是必填的</div><div *ngIf="clientFirstName.errors.minlength && clientFirstName.touched" class="alter alert-danger">名字最少是两个字</div></div></form></div>
</div>

现在表单里面添加一个字段, 然后在app.module里面添加FormsModule:

import { FormsModule } from '@angular/forms';imports: [BrowserModule,RouterModule.forRoot(appRoutes),HttpModule,
    FormsModule],

现在应该是这个样子:

然后把表单都完成 add-client.component.html:

<div class="row"><div class="col-md-6"><a routerLink="/" href="#" class="btn btn-link"><i class="fa fa-arrow-circle-o-left"></i> 回到Dashboard </a></div><div class="col-md-6"></div>
</div><div class="card"><div class="card-header">添加客户</div><div class="card-body"><form #f="ngForm" (ngSubmit)="onSubmit(f)" novalidate><div class="form-group"><label for="firstName">名</label><input type="text" class="form-control" [(ngModel)]="client.firstName" name="firstName" #clientFirstName="ngModel" minlength="2"required><div *ngIf="clientFirstName.touched && clientFirstName.invalid"><div *ngIf="clientFirstName.errors.required" class="alert alert-danger">名字是必填的</div><div *ngIf="clientFirstName.errors.minlength" class="alert alert-danger">名字最少是两个字</div></div></div><div class="form-group"><label for="lastName">姓</label><input type="text" class="form-control" [(ngModel)]="client.lastName" name="lastName" #clientLastName="ngModel" minlength="2"required><div *ngIf="clientLastName.touched && clientLastName.invalid"><div *ngIf="clientLastName.errors.required" class="alert alert-danger">姓是必填的</div><div *ngIf="clientLastName.errors.minlength" class="alert alert-danger">姓最少是两个字</div></div></div><div class="form-group"><label for="email">Email</label><input type="email" class="form-control" [(ngModel)]="client.email" name="email" #clientEmail="ngModel" required><div *ngIf="clientEmail.touched && clientEmail.invalid"><div *ngIf="clientEmail.errors.required" class="alert alert-danger">Email是必填的</div></div></div><div class="form-group"><label for="phone">联系电话</label><input type="text" class="form-control" [(ngModel)]="client.phone" name="phone" #clientPhone="ngModel" minlength="10"><div *ngIf="clientPhone.touched && clientPhone.invalid"><div *ngIf="clientPhone.errors.minlength" class="alert alert-danger">电话最少是10位</div></div></div><div class="form-group"><label for="balance">余额</label><input type="number" class="form-control" [(ngModel)]="client.balance" name="balance" #clientBalance="ngModel" [disabled]="disableBalanceOnAdd"></div><input type="submit" class="btn btn-primary btn-block" value="提交"></form></div>
</div>

现在看起来是这样:

再安装一个库: npm install --save angular2-flash-messages

这个库可以略微灵活的显示提示信息.

npm install --save angular2-flash-messages

在app.module里面:

import { FlashMessagesModule } from 'angular2-flash-messages';imports: [BrowserModule,RouterModule.forRoot(appRoutes),HttpModule,FormsModule,
    FlashMessagesModule],

add-client.component.ts:

import { Component, OnInit } from '@angular/core';
import { FlashMessagesService } from 'angular2-flash-messages';
import { Router } from '@angular/router';
import { Client } from '../../models/Client';@Component({selector: 'app-add-client',templateUrl: './add-client.component.html',styleUrls: ['./add-client.component.css']
})
export class AddClientComponent implements OnInit {public client: Client = {id: 0,firstName: '',lastName: '',email: '',phone: '',balance: 0};public disableBalanceOnAdd = true;constructor(public flashMessagesService: FlashMessagesService,public router: Router) { }ngOnInit() {}onSubmit({ value, valid }: { value: Client, valid: boolean }) {if (!valid) {this.flashMessagesService.show('请正确输入表单', { cssClass: 'alert alert-danger', timeout: 4000 });this.router.navigate(['/add-client']);} else {console.log('valid');}}
}

然后需要在某个地方放置flash messages, 打开app.component.html:

<app-navbar></app-navbar>
<div class="container"><flash-messages></flash-messages><router-outlet></router-outlet>
</div>

然后运行一下:

大约这个样子.

然后修改提交, 注入clientService, 把数据新增到web api:

import { Component, OnInit } from '@angular/core';
import { FlashMessagesService } from 'angular2-flash-messages';
import { Router } from '@angular/router';
import { Client } from '../../models/Client';
import { ClientService } from '../../services/client.service';@Component({selector: 'app-add-client',templateUrl: './add-client.component.html',styleUrls: ['./add-client.component.css']
})
export class AddClientComponent implements OnInit {public client: Client = {id: 0,firstName: '',lastName: '',email: '',phone: '',balance: 0};public disableBalanceOnAdd = true;constructor(public flashMessagesService: FlashMessagesService,public router: Router,public clientService: ClientService) { }ngOnInit() {}onSubmit({ value, valid }: { value: Client, valid: boolean }) {if (this.disableBalanceOnAdd) {value.balance = 0;}if (!valid) {this.flashMessagesService.show('请正确输入表单', { cssClass: 'alert alert-danger', timeout: 4000 });this.router.navigate(['/add-client']);} else {this.clientService.create(value).subscribe(client => {console.log(client);this.flashMessagesService.show('新客户添加成功', { cssClass: 'alert alert-success', timeout: 4000 });this.router.navigate(['/']);});}}
}

可以运行试试. 应该是好用的.

Client Detail 客户明细:

首先在app.module.ts里面添加路由:

const appRoutes: Routes = [{ path: '', component: DashboardComponent },{ path: 'register', component: RegisterComponent },{ path: 'login', component: LoginComponent },{ path: 'add-client', component: AddClientComponent },{ path: 'client/:id', component: ClientDetailsComponent }
];

然后在clients.componet.html修改:

      <td><a href="" [routerLink]="['/client', client.id]" class="btn btn-secondary btn-sm"><i class="fa fa-arrow-circle-o-right"></i> 明细</a></td>

修改client-detail.component.ts:

import { Component, OnInit } from '@angular/core';
import { ClientService } from '../../services/client.service';
import { FlashMessagesService } from 'angular2-flash-messages';
import { Router, ActivatedRoute, Params } from '@angular/router';
import { Client } from '../../models/Client';@Component({selector: 'app-client-details',templateUrl: './client-details.component.html',styleUrls: ['./client-details.component.css']
})
export class ClientDetailsComponent implements OnInit {id: string;client: Client;hasBalance = false;showBalanceUpdateInput = false;constructor(public clientService: ClientService,public router: Router,public route: ActivatedRoute,public flashMessagesService: FlashMessagesService) { }ngOnInit() {// 获取IDthis.id = this.route.snapshot.params['id'];// 获取Clientthis.clientService.getOne(+this.id).subscribe(client => {if (client.balance > 0) {this.hasBalance = true;}this.client = client;});}}

然后修改html:

<div class="row"><div class="col-md-6"><a routerLink="/" class="btn btn-link"><i class="fa fa-arrow-circle-o-left"></i> 回到Dashboard</a></div><div class="col-md-6"><div class="btn-group pull-right"><a [routerLink]="['/edit-client', id]" class="btn btn-secondary">编辑</a><button type="button" class="btn btn-danger" (click)="onDeleteClick()">删除</button></div></div>
</div>
<hr>
<div class="card" *ngIf="client"><div class="card-header"><h3> {{client.firstName + ' ' + client.lastName}}</h3></div><div class="card-body"><div class="row"><div class="col-md-8"><h4>客户ID: {{id}}</h4></div><div class="col-md-4"><h4 class="pull-right">余额:<span [class.text-danger]="!hasBalance" [class.text-success]="hasBalance">{{client.balance | currency: 'USD': true}}</span><small><a (click)="showBalanceUpdateInput = !showBalanceUpdateInput"><i class="fa fa-pencil"></i></a></small></h4><div class="clearfix"><form *ngIf="showBalanceUpdateInput" (submit)="updateBalance(id)" class="form-inline pull-right"><div class="form-group"><input type="number" class="form-control" name="balance" [(ngModel)]="client.balance"></div><button type="submit" class="btn btn-primary">更新</button></form></div></div></div><hr><ul class="list-group"><li class="list-group-item">Email: {{client.email}}</li><li class="list-group-item">联系电话: {{client.phone}}</li></ul></div>
</div>

然后要做一个修改余额的动作, 这是个部分更新, 应该对应http patch.

目前client.service里没有patch, 所以需要添加一个patch方法, 不过首先建立一个PatchModel.ts:.

export interface PatchModel {op: string;path: string;value: any;
}

client.service.ts:

import { PatchModel } from '../models/PatchModel';patch(id: number, patchs: PatchModel[]) {return this.http.patch(`${this.url}/${id}`, JSON.stringify(patchs), { headers: this.headers }).map(response => response.json()).catch(this.handleError);}

然后修改 client-detail.component.ts:

import { PatchModel } from '../../models/PatchModel';updateBalance(id: string) {// 更新客户的余额this.clientService.patch(+id, [{ op: 'replace', path: '/balance', value: this.client.balance }]).subscribe(() => {this.showBalanceUpdateInput = false;this.flashMessagesService.show('更新余额成功', { cssClass: 'alert alert-success', timeout: 4000 });});}

运行一下, 应该好用:

删除动作:

  onDeleteClick() {if (confirm('确定要删除?')) {this.clientService.delete(+this.id).subscribe(() => {this.flashMessagesService.show('客户删除成功', { cssClass: 'alert alert-success', timeout: 4000 });this.router.navigate(['/']);});}}

应该好用, 删除后跳转到dashboard.

编辑客户 Edit-Client

 先添加路由 app.module.ts:

const appRoutes: Routes = [{ path: '', component: DashboardComponent },{ path: 'register', component: RegisterComponent },{ path: 'login', component: LoginComponent },{ path: 'add-client', component: AddClientComponent },{ path: 'client/:id', component: ClientDetailsComponent },
  { path: 'edit-client/:id', component: EditClientComponent }
];

然后修改edit-client.component.html:

<div class="row"><div class="col-md-6"><a [routerLink]="['/client', id]" href="#" class="btn btn-link"><i class="fa fa-arrow-circle-o-left"></i> 回到客户明细 </a></div><div class="col-md-6"></div></div><div class="card"><div class="card-header">编辑客户</div><div class="card-body"><form #f="ngForm" (ngSubmit)="onSubmit(f)" *ngIf="client" novalidate><div class="form-group"><label for="firstName">名</label><input type="text" class="form-control" [(ngModel)]="client.firstName" name="firstName" #clientFirstName="ngModel" minlength="2"required><div *ngIf="clientFirstName.touched && clientFirstName.invalid"><div *ngIf="clientFirstName.errors.required" class="alert alert-danger">名字是必填的</div><div *ngIf="clientFirstName.errors.minlength" class="alert alert-danger">名字最少是两个字</div></div></div><div class="form-group"><label for="lastName">姓</label><input type="text" class="form-control" [(ngModel)]="client.lastName" name="lastName" #clientLastName="ngModel" minlength="2"required><div *ngIf="clientLastName.touched && clientLastName.invalid"><div *ngIf="clientLastName.errors.required" class="alert alert-danger">姓是必填的</div><div *ngIf="clientLastName.errors.minlength" class="alert alert-danger">姓最少是两个字</div></div></div><div class="form-group"><label for="email">Email</label><input type="email" class="form-control" [(ngModel)]="client.email" name="email" #clientEmail="ngModel" required><div *ngIf="clientEmail.touched && clientEmail.invalid"><div *ngIf="clientEmail.errors.required" class="alert alert-danger">Email是必填的</div></div></div><div class="form-group"><label for="phone">联系电话</label><input type="text" class="form-control" [(ngModel)]="client.phone" name="phone" #clientPhone="ngModel" minlength="10"><div *ngIf="clientPhone.touched && clientPhone.invalid"><div *ngIf="clientPhone.errors.minlength" class="alert alert-danger">电话最少是10位</div></div></div><div class="form-group"><label for="balance">余额</label><input type="number" class="form-control" [(ngModel)]="client.balance" name="balance" #clientBalance="ngModel" [disabled]="disableBalanceOnEdit"></div><input type="submit" class="btn btn-primary btn-block" value="提交"></form></div></div>

修改edit-client.component.ts:

import { Component, OnInit } from '@angular/core';
import { ClientService } from '../../services/client.service';
import { FlashMessagesService } from 'angular2-flash-messages';
import { Router, ActivatedRoute, Params } from '@angular/router';
import { Client } from '../../models/Client';@Component({selector: 'app-edit-client',templateUrl: './edit-client.component.html',styleUrls: ['./edit-client.component.css']
})
export class EditClientComponent implements OnInit {id: string;client: Client;disableBalanceOnEdit = true;constructor(public clientService: ClientService,public router: Router,public route: ActivatedRoute,public flashMessagesService: FlashMessagesService) { }ngOnInit() {// 获取IDthis.id = this.route.snapshot.params['id'];// 获取Clientthis.clientService.getOne(+this.id).subscribe(client => {this.client = client;});}onSubmit({ value, valid }: { value: Client, valid: boolean }) {if (!valid) {this.flashMessagesService.show('请正确输入表单', { cssClass: 'alert alert-danger', timeout: 4000 });this.router.navigate(['/edit-client', this.id]);} else {this.clientService.update(+this.id, value).subscribe(client => {console.log(client);this.flashMessagesService.show('更新客户成功', { cssClass: 'alert alert-success', timeout: 4000 });this.router.navigate(['/client', this.id]);});}}
}

client.service.ts需要修改一下, 之前的update方法写的不正确也不符合规范:

  update(id: number, client: Client) {return this.http.put(`${this.url}/${id}`, JSON.stringify(client), { headers: this.headers }).map(response => response.json()).catch(this.handleError);}

然后运行, 好用.

先写到这, 估计还得写一篇, 下一篇文章里面要使用identity server 4了, implicit grant flow.