订阅Angular2中的router.events.subscribe时如何从Route或ActivatedRoute获取数据? [英] How to get data from Route or ActivatedRoute when subscribing to router.events.subscribe in Angular2?

问题描述

每当路由更改时，我都试图从路由器获取数据，但是我没有成功.在这里设置asdf属性

I'm trying to get the data from a Router whenever the Route changes but I'm not having success. Here I set the asdf property

@NgModule({
  bootstrap: [AppComponent],
  declarations: [
    AppComponent,
    LoginComponent,
    DashboardComponent,
    OverviewComponent,
  ],
  imports: [
    BrowserModule,
    FormsModule,
    RouterModule.forRoot([
      { path: '', pathMatch: 'full', redirectTo: '' },
      { component: LoginComponent, path: 'login' },
      {
        children: [
          { path: '', pathMatch: 'full', redirectTo: 'overview', data: { asdf: 'hello' } },
          { component: OverviewComponent, path: 'overview', data: { asdf: 'hello' } },
        ], component: DashboardComponent,
        path: '',
      },
    ]),
  ],
})
export class AppModule { }

在这里，当路由更改但asdf未定义时，我可以从路由器获取URL:(

And here I can get the URL from the router when the route changes but asdf is undefined :(

import { Component, OnDestroy, OnInit } from '@angular/core';
import { Router } from '@angular/router';
import { ActivatedRoute, NavigationEnd } from '@angular/router';
@Component({
  selector: 'cs-map',
  styleUrls: ['map.component.css'],
  templateUrl: 'map.component.html',
})
export class MapComponent implements OnInit {
  private routerSub;

  constructor(private router: Router, private activatedRoute: ActivatedRoute) { }

  public ngOnInit() {
    this.router.events.subscribe((val) => {
      if (val instanceof NavigationEnd) {
        let url = val.url;
        console.log(this.activatedRoute.snapshot.data['asdf']); // data is defined but asdf is not :(
      }
    });
  }
}

如何获取asdf的值?

我正在导航至/overview

推荐答案

没有 while 循环

constructor(private router: Router, 
        private activatedRoute: ActivatedRoute)
{

 this.router.events
        .filter(event => event instanceof NavigationEnd)
        .map(() => this.activatedRoute)
        .map(route => route.firstChild)
        .switchMap(route => route.data)
        .map(data => data['asdf'])
}

这篇关于订阅Angular2中的router.events.subscribe时如何从Route或ActivatedRoute获取数据?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！