Angular: append query parameters to URL

Question

Im using this:

    import { HttpParams } from '@angular/common/http';
    let params = new HttpParams();
    params.append('newOrdNum','123');

But this is not working, i dont append param in url. Any suggestion?

Answer 1

This could be achieved by using the Router class:

Using a component:

import { Router, ActivatedRoute } from '@angular/router';

@Component({})
export class FooComponent {
   constructor(
     private _route: ActivatedRoute,
     private _router: Router
   ){}

   navigateToFoo(){
     // changes the route without moving from the current view or
     // triggering a navigation event,
     this._router.navigate([], {
      relativeTo: this._route,
      queryParams: {
        newOrdNum: '123'
      },
      queryParamsHandling: 'merge',
      // preserve the existing query params in the route
      skipLocationChange: true
      // do not trigger navigation
    });
   }
}

For more info check this book and the angular Router API

Answer 2

You should use Router module. check this doc: https://angular.io/guide/router

You need import these modules: import { Router, ActivatedRoute, ParamMap } from '@angular/router';

Answer 3

You should write

let params = new HttpParams();
params = params.append('newOrdNum','123');

Answer 4

this.router.navigate(['.'], { relativeTo: this.route, queryParams: { 'a': 'b' }, queryParamsHandling: 'merge', skipLocationChange: true});

router: Router route: ActivatedRoute

Answer 5

I had to adjust Jota.Toledos answer a bit so that it works for me, I had to take out the second and the last property of the extras - object:

   navigateToFoo(){
     this._router.navigate([], {
      queryParams: {
        newOrdNum: '123'
      },
      queryParamsHandling: 'merge',
    });
   }

Answer 6

Make sure while passing query params value should not be undefined.

      this.router.navigate([yourRoute,
         queryParams : 
              {
                key : (yourValue ? yourValue : '')
              },
         queryParamsHandling: 'merge'
            ]);