Angular 2 : Cannot find name 'Subscription'

Question

尝试设置属性类型时，出现错误 Cannot find name 'Subscription'。我从哪个包导入它？

import { Component, OnDestroy, OnInit } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';

// I'm missing an import here. Just don't know which package to load from.

@Component({
  moduleId: module.id,
  selector: 'my-component',
  templateUrl: 'my.component.html',
  styleUrls: ['my.component.css']
})
export class MyComponent implements OnInit, OnDestroy {

  private sub: any;

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

  ngOnInit() {
    this.sub = this.route.params.subscribe(params => {
       let id = +params['id']; // (+) converts string 'id' to a number
     });
  }

  ngOnDestroy() {
    this.sub.unsubscribe();
  }

}

编辑:提供更详细的代码示例。

Answer 1

你必须像这样导入它:

import { Subscription } from 'rxjs';

原始答案

import { Subscription } from 'rxjs/Subscription';

看这里:https://angular.io/docs/ts/latest/guide/router.html该文档中有几个 plunker 的链接。