Navigating to the same route not refreshing the component?

问题

I've upgraded to use the new Angular 2 router from router-deprecated and some behavior has changed.

The page I'm having issues with is a search page. We've chosen to put all the search terms in the URL using the HashLocationStrategy. The routes look like this:

const routes: RouterConfig = [
  { path: '', component: HomeComponent },
  { path: 'search/:term/:cat/:page/:sort/:size/:more', component: HomeComponent },
  { path: 'search/:term/:cat/:page/:sort/:size', component: HomeComponent },
  { path: 'search/:term/:cat/:page/:sort', component: HomeComponent },
  { path: 'search/:term/:cat/:page', component: HomeComponent },
  { path: 'search/:term/:cat', component: HomeComponent },
  { path: 'search/:term', component: HomeComponent },
  { path: 'details/:accountNumber', component: DetailsComponent }
];

I know a query string approach might be better fit for all these options but project requirements decided by other people...

Anyway if I navigate to localhost/#/search/Hello using this.router.navigate(['/search/Hello']); then the router works fine and everything is great. While on that page if I try to this.router.navigate(['/search/World']); then the URL in the browser's address bar will update accordingly but the component doesn't change at all.

Previously I could use routerCanReuse to indicate that I did want to reuse the search component and routerOnReuse would rerun the search when the navigation happened. I don't see equivalent's to these in @angular/router. How can I reload the current route with new URL parameters?

I'm running version 2.0.0-rc.3 for Angular 2 and 3.0.0-alpha.8 of @angular/router.

回答1:

If only the params has changes the component itself won't be initialize again. But you can subscribe to changes in the parameters that you send.

For example on ngOnInit method you can do something like this:

ngOnInit() {
    this.sub = this.route.params.subscribe(params => {
       const term = params['term'];
       this.service.get(term).then(result => { console.log(result); });
     });
  }

来源：https://stackoverflow.com/questions/38127308/navigating-to-the-same-route-not-refreshing-the-component