Angular 2：找不到名称“订阅”

尝试设置属性的类型时出现错误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();
  }

}

Edit:提供更详细的代码示例。

你必须像这样导入它：

import { Subscription } from 'rxjs';

原答案

import { Subscription } from 'rxjs/Subscription';

看看这里：https://angular.io/docs/ts/latest/guide/router.html https://angular.io/docs/ts/latest/guide/router.html该文档中链接了几个 plunker。