如何将值从一个组件发送到另一个组件? [英] How to send a value from one component to another?

问题描述

我制作了一个组件，其中有一个输入字段和按钮.单击按钮时，我正在显示第二个组件.我想将数据从一个组件发送到另一个组件?

I make a componenet in which I have one input field and button.On click of button I am diplaying the second component.I want to send data from one component to another component ?

我如何将数据从一个组件发送到另一个组件..我需要发送输入值(用户在输入字段中输入的内容)我需要在下一个组件或下一页显示.单击按钮.如何发送数据?这是我的plunkerhttp://plnkr.co/edit/IINX8Zq8J2LUTIyf4DYD?p=preview

how I will send data from one component to another ..I need to send input value (what ever user type in input field ) I need to show on next component or next page .On button click .how to send data ? here is my plunker http://plnkr.co/edit/IINX8Zq8J2LUTIyf4DYD?p=preview

import {Component,View} from 'angular2/core';
import {Router} from 'angular2/router';

@Component({
    templateUrl: 'home/home.html'
})


export class AppComponent {
   toDoModel;
  constructor(private _router:Router) {


  }

  onclck(inputValue){
    alert(inputValue)
    this._router.navigate(['Second']);
  }

}

推荐答案

哦！！可能是我来不及回答这个问题了！但没关系.这可能会帮助您或其他人使用路由器、共享服务和共享对象在共享服务中使用的组件之间共享数据.我希望这肯定会有所帮助.

Oh!! may be I' m too late to answer the question! But never mind.This might help you or other to share data between components using Router,Shared-Service and Shared-object used withing shared-service. I hope this will surely help.

答案

Boot.ts

import {Component,bind} from 'angular2/core';

import {bootstrap} from 'angular2/platform/browser';

import {Router,ROUTER_PROVIDERS,RouteConfig, ROUTER_DIRECTIVES,APP_BASE_HREF,LocationStrategy,RouteParams,ROUTER_BINDINGS} from 'angular2/router';

import {SharedService} from 'src/sharedService';

    import {ComponentFirst} from 'src/cone';
import {ComponentTwo} from 'src/ctwo';


@Component({
  selector: 'my-app',
  directives: [ROUTER_DIRECTIVES],
  template: `
    <h1>
      Home
    </h1> 

    <router-outlet></router-outlet>
      `,

})

@RouteConfig([
  {path:'/component-first', name: 'ComponentFirst', component: ComponentFirst}
  {path:'/component-two', name: 'ComponentTwo', component: ComponentTwo}

])

export class AppComponent implements OnInit {

  constructor(router:Router)
  {
    this.router=router;
  }

    ngOnInit() {
    console.log('ngOnInit'); 
    this.router.navigate(['/ComponentFirst']);
  }



}

    bootstrap(AppComponent, [SharedService,
    ROUTER_PROVIDERS,bind(APP_BASE_HREF).toValue(location.pathname)
    ]);

第一组件

import {Component,View,bind} from 'angular2/core';
import {SharedService} from 'src/sharedService';
import {Router,ROUTER_PROVIDERS,RouteConfig, ROUTER_DIRECTIVES,APP_BASE_HREF,LocationStrategy,RouteParams,ROUTER_BINDINGS} from 'angular2/router';
@Component({
  //selector: 'f',
  template: `
    <div><input #myVal type="text" >
    <button (click)="send(myVal.value)">Send</button>
      `,

})

export class ComponentFirst   {

  constructor(service:SharedService,router:Router){
    this.service=service;
    this.router=router;
  }

  send(str){
    console.log(str);
    this.service.saveData(str); 
    console.log('str');
    this.router.navigate(['/ComponentTwo']);
  }

}

第二组件

import {Component,View,bind} from 'angular2/core';
import {SharedService} from 'src/sharedService';
import {Router,ROUTER_PROVIDERS,RouteConfig, ROUTER_DIRECTIVES,APP_BASE_HREF,LocationStrategy,RouteParams,ROUTER_BINDINGS} from 'angular2/router';
@Component({
  //selector: 'f',
  template: `
    <h1>{{myName}}</h1>
    <button (click)="back()">Back<button>
      `,

})

export class ComponentTwo   {

  constructor(router:Router,service:SharedService)
  {
    this.router=router;
    this.service=service;
    console.log('cone called');
    this.myName=service.getData();
  }
  back()
  {
     console.log('Back called');
    this.router.navigate(['/ComponentFirst']);
  }

}

共享服务和共享对象

import {Component, Injectable,Input,Output,EventEmitter} from 'angular2/core'

// Name Service
export interface myData {
   name:string;
}



@Injectable()
export class SharedService {
  sharingData: myData={name:"nyks"};
  saveData(str){
    console.log('save data function called' + str + this.sharingData.name);
    this.sharingData.name=str; 
  }
  getData:string()
  {
    console.log('get data function called');
    return this.sharingData.name;
  }
} 

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