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ID
this.id = this.route.snapshot.params['id'];
// 获取Client
this.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ID
this.id = this.route.snapshot.params['id'];
// 获取Client
this.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.