我已经设法从API调用中获取数据,这些数据已经设法显示在表格中。现在,当您单击表格的某些项目时,我想显示该项目的更详细视图。
因此,当我打开链接localhost:4200 / detail / 12时,我想显示id = 12的对象中的数据。但是我不知道该怎么做。
我目前从people.component.html获得这样选定的人的ID
...
<tr *ngFor="let data of data" routerLink="/detail/{{data.person_id}}">
<td>{{data.person_id}}</td>
<td>{{data.name}}</td>
</tr>
...
API的数据为JSON格式:
[{"person_id":"1","name":"Tom"},{"person_id":"2","name":"Clarissa"},{"person_id":"4","name":"Micky"},...]
但是显示的(在浏览器中)数据被记录为JavaScript对象:
0:
person_id: 1
name: "Tom"
2:
person_id: 2
name: "Clarissa"
3:
person_id: 4
name: "Micky"
...
所以我必须调整people-detail.component.ts和people-detail.component.html以仅显示所选项目的数据(例如,使用person_id = 12),而不显示所有项目(即当前会发生什么?)
这是我的people-detail.component.ts当前的样子
...
export class PeopleDetailComponent implements OnInit {
public data: any = []
constructor(
public http: HttpClient,
private route: ActivatedRoute) { }
getData(){
const person_id = +this.route.snapshot.paramMap.get('person_id');
const url ='http://localhost:4000/api/allpeople'
this.http.get(url).subscribe
(data => this.data = data);
}
ngOnInit() : void{
this.getData()
}
这是我当前的people-detail.component.html:
<div *ngFor="let data of data">
<div>
<span>id1: </span>
{{data.regulation_id}}
</div>
</div>
如下设置点击侦听器。
<table>
<thead>
<tr>
<th>ID</th>
<th>Name</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let data of data" (click)="onClickHandler(data.person_id)">
<td>{{data.person_id}}</td>
<td>{{data.name}}</td>
</tr>
</tbody>
</table>
这会将所选项目的ID传递到处理程序方法。具有所选ID的对象将存储在“ selected”变量中。
onClickHandler(id)
{
this.selected=this.data.find(item=>{
if(item['id']===id)
{
return true;
}
return false;
});
}
我会使用解析器。
首先声明详细视图的路径:
const routes: Routes = [
{
path: 'detail/:id',
component: PersonComponent,
resolve: { message: PersonResolver }
}
];
您可以在想要获取人员详细信息的任何地方使用解析器(可重用的在加载组件之前获取数据的方式
然后在路径上创建解析器:
import { Injectable } from '@angular/core';
import { Resolve, ActivatedRoute, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { of } from "rxjs";
import { delay } from "rxjs/operators";
@Injectable()
export class PersonResolver implements Resolve<Person> {
constructor(private route: ActivatedRoute) {
}
resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot){
const id = route.paramMap.get('id');
const url = 'your url here';
return this.http.get(url);
}
}
您也可以查看此内容以选择嵌入式stackblitz
您必须创建数据接口:
export interface iUsers {
person_id: string;
name: string;
}
然后您必须将代码更改为:
public data: iUsers[] = []
this.http.get<iUsers[]>(url).subscribe((res)=>{
this.data = res
console.log(this.data)
})