How to pass and get parameter with routerLink in Angular 2?

Question

I want to pass a value with url using routerLink. And read that value on another page. Like I have product list. On select of first record the id of that record pass to product detail page. After read that productId I want to show detail of that product.

So How can I pass and get the parameter?

Answer 1

you can use this in .html

[routerLink]="['/trips/display/' + item.trip, {'paramKey': 'application'}]"

and in .ts you can use this to recover the params

this.id = this.route.snapshot.params['id'];
const param = this.route.snapshot.params['paramKey'];

Answer 2

I'm assuming you have some code like this:

{ path: 'product/:id', component: ProductDetailComponent }

in ProductList template

<a [routerLink]="['/product', id]">Home</a>

or

<a [routerLink]="['/product', 5]">Home</a>

where id is a variable, maybe you got it in a loop.

in ProductDetailComponent:

constructor(
  private route: ActivatedRoute,
  private router: Router
) {}
ngOnInit() {

  this.route.params
    // (+) converts string 'id' to a number
    .switchMap((params: Params) => this.yourProductService.getProductById(+params['id']))
    .subscribe((product) => this.product = product);
}

Router document: https://angular.io/docs/ts/latest/guide/router.html

Answer 3

Use routerLink on your a tag for passing it by url.

[routerLink]="['yourRouteHere', {'paramKey': paramValue}]

To get it you need to use ActivatedRoute service. Inject it into your component and use it's subscribe method. Here my route is the injected service

this.route.params.subscribe(params => {
   const id = Number.parseInt(params['paramKey']);
}

If you want to get parameters from the route segment use .params, else if you want from query string, use .queryParams