如何将数据从子级传递到父级组件Angular [英] How to Pass data from child to parent component Angular
本文介绍了如何将数据从子级传递到父级组件Angular的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个名为search_detail的组件,该组件中还有一个名为Calendar的组件
I have a component named search_detail which has another component inside it named calendar,
SearchDetail_component.html
<li class="date">
<div class="btn-group dropdown" [class.open]="DatedropdownOpened">
<button type="button" (click)="DatedropdownOpened = !DatedropdownOpened" class="btn btn-default dropdown-toggle" data-toggle="dropdown"
aria-haspopup="true" [attr.aria-expanded]="dropdownOpened ? 'true': 'false'">
Date <span class="caret"></span>
</button>
<ul class="dropdown-menu default-dropdown">
<calendar ></calendar>
<button > Cancel </button>
<button (click)="setDate(category)"> Ok </button>
</ul>
</div>
</li>
SearchDetail_component.ts
import 'rxjs/add/observable/fromEvent';
@Component({
selector: 'searchDetail',
templateUrl: './search_detail.component.html',
moduleId: module.id
})
Calendar.component.ts
import { Component, Input} from '@angular/core';
@Component({
moduleId:module.id,
selector: 'calendar',
templateUrl: './calendar.component.html'
})
export class CalendarComponent{
public fromDate:Date = new Date();
private toDate:Date = new Date();
private events:Array<any>;
private tomorrow:Date;
private afterTomorrow:Date;
private formats:Array<string> = ['DD-MM-YYYY', 'YYYY/MM/DD', 'DD.MM.YYYY', 'shortDate'];
private format = this.formats[0];
private dateOptions:any = {
formatYear: 'YY',
startingDay: 1
};
private opened:boolean = false;
public getDate():number {
return this.fromDate.getDate() || new Date().getTime();
}
}
我想单击搜索详细信息页面中的确定"按钮来访问开始日期和结束日期.我该怎么办?
I want to access the startdate and enddate on click of the ok button in the search detail page. how can i do?
推荐答案
在子组件中将EventEmitter
注册为@Output
:
@Output() onDatePicked: EventEmitter<any> = new EventEmitter<any>();
发出点击价值:
public pickDate(date: any): void {
this.onDatePicked.emit(date);
}
收听父组件模板中的事件:
Listen for the events in your parent component's template:
<div>
<calendar (onDatePicked)="doSomething($event)"></calendar>
</div>
并在父组件中:
public doSomething(date: any):void {
console.log('Picked date: ', date);
}
在官方文档中也对此进行了很好的解释:组件交互.
It's also well explained in the official docs: Component interaction.
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