Angular:将查询参数附加到 URL

Question

我正在使用这个:

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

但这不起作用，我没有在 url 中附加参数。有什么建议吗？

Answer 1

这可以通过使用 Router 类来实现:

使用组件:

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
    });
   }
}

更多信息请查看this book和 Angular Router API