Angular2 Component does not reinitialize for param

问题:

I have below test route with parameter T1:

{
    path: 'Test/:T1',
    component: TestComponent
},

When I route to 'Test/2' from 'Test/1' my TestComponent does not reinitialize. Is it an issue with angular router?

I am using "@angular/router": "3.0.0-beta.1"

回答1:

This is currently the only supported behavior. There are plans to make this configurable https://github.com/angular/angular/issues/9811

You can subscribe to parameters change and do the initialization there

export class MyComponent {
    constructor(private route : ActivatedRoute,
      private r : Router) {}

    reloadWithNewId(id:number) {
        this.r.navigateByUrl('my/' + id + '/view');
    }

    ngOnInit() {
      this.sub = this.route.params.subscribe(params => {
         this.paramsChanged(params['id']);
       });
    }

    paramsChanged(id) {
      console.log(id);
      // do stuff with id

    }
}

See also How do I re-render a component manually?

回答2:

After about 2 hours of searching the web for an answer to this router issue, my Solution was to forego the router and just let my component do its thing.

window.location.href = '/my/' + new_id_param + '/view';

This could also work for you if you have no guards that would prevent it from being loaded by visiting the url with the right params.

Not the "best practice way" but it works for me.