this.myhttp.get(‘http://192.168.2.139:9002/api/patients‘)方法，读取webapi。因为get方法是通过AJAX方法读取数据的，所以服务器要可以跨域访问，具体方法查询webapi文章
1 import { Component, OnInit } from ‘@angular/core‘;
2 import { HttpClient } from ‘@angular/common/http‘;
3 import { Patient } from ‘./app.patient.server‘;
4 @Component({
5 selector: ‘app-root‘,
6 templateUrl: ‘./app.component.html‘,
7 styleUrls: [‘./app.component.css‘]
8 })
9
10 export class AppComponent implements OnInit {
11 title = ‘angular4.3‘;
12 results: string[];
13 myPatientList: Patient[] = [];
14
15 16 constructor(
17 private myhttp: HttpClient
18 ) { }
19
20 ngOnInit(): void {
21 this.myhttp.get(‘http://192.168.2.139:9002/api/patients‘)
22 .subscribe(data => {
23 this.myPatientList = (<any>data).map(u => new Patient({
24 id: u.PatientId,
25 FirstName: u.Details.FirstName,
26 LastName: u.Details.LastName,
27 MiddleName: u.Details.MiddleName,
28 BirthDate: u.Details.BirthDate,
29 Gender: u.Details.Gender,
30 PhoneNumber: u.PersonalInfo.PhoneNumberPrimary,
31 ZIPCODE: u.PersonalInfo.ZIPCODE,
32 City: u.PersonalInfo.City,
33 Street: u.PersonalInfo.Street,
34 EmailAddress: u.PersonalInfo.EmailAddressPrimary,
35 CitizenServiceNumber: u.PersonalInfo.ServiceNumber
36 }));
37 38 });
39 }
40 }
(<any>data).map()方法直接把读取data数据转换成实体类。
【注：需要查看自己的json文件，对应好结构】 网上很多json都是以results[]开头。以所用(<any>data).results.map() 这个问题真的卡了我很久，在同事长庆的帮助下才得以解决。
实体类代码，如下：
1 export class Patient {
2 id: string;
3 FirstName: string;
4 LastName: string;
5 MiddleName: string;
6 BirthDate: string;
7 Gender: string;
8 PhoneNumber: string;
9 ZIPCODE: string;
10 City: string;
11 Street: string;
12 EmailAddress: string;
13 CitizenServiceNumber: string;
14
15 public constructor(
16 fields?: {
17 id: string,
18 FirstName: string,
19 LastName: string,
20 MiddleName: string,
21 BirthDate: string,
22 Gender: string,
23 PhoneNumber: string,
24 ZIPCODE: string,
25 City: string,
26 Street: string,
27 EmailAddress: string,
28 CitizenServiceNumber: string
29 }) {
30 // tslint:disable-next-line:curly
31 if (fields) Object.assign(this, fields);
32 }
33
34 getFullName(): string {
35 return this.FirstName + ‘ ‘ + this.LastName;
36 }
37 }
前台调用很简单，直接读取实体类就可以了
1 <div style="text-align:center">
2 <h1>
3 Welcome to {{title}}!
4 </h1>
5 {{results}}
6 <h2>ngfor</h2>
7 <ul>
8 <li *ngFor="let myPatient of myPatientList" >
9 id:{{myPatient.id}} FirstName :{{myPatient.FirstName}}
10 </li>
11 </ul>
12 </div>
显示如下图：
注：这个用法写的还很简单，还需要传参数，加头文件之类的方法，不过已经可以基本的读取数据了。
转自：http://www.cnblogs.com/cxd1008/p/7685999.html
