如何在 angular2 中的一个组件中拥有多个视图

Question

我有一个表示导航栏full-layout.component.ts的组件。导航栏中的项目是从服务器接收的(但出于此问题的目的，我将进行硬编码)。

对于每个项目，都有一个与之关联的routerLink，因此当用户单击任何项目时，它将被定向到一个名为department.component.ts的组件。在此组件中，提供了一个DepartmentService，它发出http get()请求并返回字符串数组。

目前，当我full-layout.component.ts并单击任何项目时，它会完美地将我引导到那里并显示正确的数据。但是当我尝试从那里单击另一个项目时，它没有任何作用，我不确定为什么。

注意：导航栏中的所有项目都显示来自服务器的部门列表。

这是我的代码：

ul 由我的物品组成

full-layout.component.html

<ul class="nav-dropdown-items">
<li class="nav-item" *ngFor="let item of dropDownItems">
<a #clicked class="nav-link" routerLinkActive="active" [routerLink]="[item.routerLink]" (click)="send(item.name)" >
<i class="icon-puzzle"></i>{{item.name}}
</a>
</li>
</ul>

full-layout.component.ts

@Component({
selector: 'app-dashboard',
templateUrl: './full-layout.component.html',
providers: [SharedService]
})
export class FullLayoutComponent implements OnInit {
service;
constructor(service: SharedService) { this.service = service; }
ngOnInit() {}
send(str) { this.service.saveData(str); }
dropDownItems = [{
routerLink: '/components/departments',
name: 'Artshums'
},
{
routerLink: '/components/departments',
name: 'Dentistry'
},
{
routerLink: '/components/departments',
name: 'Law'
},
{
routerLink: '/components/departments',
name: 'IOPPN'
},
{
routerLink: '/components/departments',
name: 'LSM'
},
{
routerLink: '/components/departments',
name: 'NMS'
},
{
routerLink: '/components/departments',
name: 'Nursing'
},
{
routerLink: '/components/departments',
name: 'SSPP'
},
{
routerLink: '/components/departments',
name: 'Health'
}
];
}

departments.component.ts

@Component({
selector: 'app-departments',
templateUrl: './departments.component.html',
providers: [DepartmentsService]
})
export class DepartmentsComponent implements OnInit {
router; service; myName; _faculty: Faculty;
constructor(service: SharedService, private departmentsService: DepartmentsService) {
this.service = service;
this.myName = service.getData();
}
ngOnInit() {
console.log(this.myName);
this.departmentsService.getData(this.myName).then(
(faculties: Faculty) => this._faculty = faculties
);
}
}

departments.service.ts

@Injectable()
export class DepartmentsService {
constructor(
private http: Http
) {}
getData(facultyName): Promise < any > {
return this.http.get('/admin/faculty/' + facultyName).toPromise().then(response => response.json()).catch(DepartmentsService.handleError);
}
}

departments.component.html

<ul class="departments-box" *ngFor="let fac of _faculty">
<li *ngFor="let dep of fac.Departments">
{{dep}}
</li>
</ul>

问题

当用户在任何项目中时，我如何才能实现这一点，它应该显示正确的信息和更新视图？

Answer 1

您可以在 angular2 中使用 route 参数和 Activated Route

在完整布局中进行修改.html方法是将名称作为路由参数传递。

<a #clicked class="nav-link" routerLinkActive="active" [routerLink]="
[item.routerLink,item.name]"> 

访问应用部门中的参数为

import { ActivatedRoute } from '@angular/router'
departmentName: string = ""; // used for the route parameter.
constructor(private route: ActivatedRoute,.....) {
this.departmentName= route.snapshot.params.name;
}
ngOnInit(){
this.departmentsService.getData(this.myName).then(
(faculties: Faculty) => this._faculty = faculties
);
}

您的路由 URL 应修改为

/components/departments/:name