Javascript 将布尔值传递给另一个角度组件
我有两个角分量 results.table和results.query 当用户单击results.query.component中的reset按钮时,我想将表隐藏在results.table.component中 也许我在事件发射器上做得不对,或者可能有更好的方法来做这件事 results.table HTMLJavascript 将布尔值传递给另一个角度组件,javascript,angular,typescript,boolean,Javascript,Angular,Typescript,Boolean,我有两个角分量 results.table和results.query 当用户单击results.query.component中的reset按钮时,我想将表隐藏在results.table.component中 也许我在事件发射器上做得不对,或者可能有更好的方法来做这件事 results.table HTML <div *ngIf='results?.length>0'> <table *ngIf="showResults" class='table'>
<div *ngIf='results?.length>0'>
<table *ngIf="showResults" class='table'>
<tr>
<th>Result Name</th>
<th>Location</th>
</tr>
<tbody>
<ng-template ngFor let-results [ngForOf]='items' let-i="index">
<tr>
<td>
<span>{{result?.description}}</span>
</td>
<td>
<span>{{result?.location}}</span>
</td>
</tr>
</ng-template>
</tbody>
</table>
</div>
<app-results-query (showResults)="changeShowResults($event)"></app-results-query>
<table *ngIf="showResults">
//table stuff
</table>
results.queryhtml
<div class="panel-body">
<form (submit)="onSubmitClicked()">
<div class="row">
<div class="form-group col-md-12 col-xs-12">
<div class="col-xs-12 col-sm-3 col-md-3 col-lg-3">
<label class="col-md-12 col-xs-12 control-label no-margin no-padding">Location: </label>
<pg-radio-toggle-select class="col-md-12 col-xs-12 no-margin no-padding" name="locationChangeInput" [(ngModel)]="Location"
(selectedChanged)="onFilteringLocation($event)" [options]='locationOptions'>
</pg-radio-toggle-select>
</div>
<pg-inputfield name="description" class="col-xs-12 col-sm-3 col-md-3 col-lg-3" [(ngModel)]="paramsModel.description"
displaytext="Name:"></pg-inputfield>
</div>
</div>
<div>
<button type="reset" class="btnReset" (click)="reset()">Reset</button>
<button type="submit" name="btnSearch">Search</button>
</div>
</form>
</div>
地点:
重置
搜寻
results.queryts
import {Component, OnInit, EventEmitter, Output} from '@angular/core';
import * as _ from 'lodash';
import { LocationService } from '../location-service.service';
@Component({
selector: 'result-query',
templateUrl: './result-query.component.html',
styleUrls: ['./result-query.component.less'],
})
export class ResultQueryComponent implements OnInit {
@Output() showResults: EventEmitter<boolean> = new EventEmitter<boolean>();
constructor(
private LocationService: LocationService,
) {
this.reset();
}
ngOnInit() {
this.reset();
}
onSubmitClicked() {
console.log('test')
}
reset(): void {
console.log('I am the reset king');
this.showResults = false;
this.showResults.emit(true);
this.onSubmitClicked();
}
}
从'@angular/core'导入{Component,OnInit,EventEmitter,Output};
从“lodash”导入*as uuu;
从“../location service.service”导入{LocationService};
@组成部分({
选择器:“结果查询”,
templateUrl:'./result query.component.html',
styleUrls:['./结果查询.component.less'],
})
导出类ResultQueryComponent在NIT上实现{
@Output()showResults:EventEmitter=新的EventEmitter();
建造师(
专用定位服务:定位服务,
) {
这是reset();
}
恩戈尼尼特(){
这是reset();
}
onSubmitClicked(){
console.log('test')
}
重置():无效{
log(“我是重置之王”);
this.showResults=false;
this.showResults.emit(true);
this.onSubmitClicked();
}
}
如果两个组件确实具有父子关系,则可以使用@Input()@Output()修饰符
父组件
import { Component, OnInit, ViewEncapsulation } from '@angular/core';
import { Stephen } from '../stephen.model';
@Component({
selector: 'app-parent',
template: `
Hello, Mr. (or Ms.): {{ selectedName }}
`,
styleUrls: ['./parent.component.css'],
encapsulation: ViewEncapsulation.None
})
export class ParentComponent implements OnInit {
stephen: Stephen;
selectedName: string;
constructor() {
this.stephen = new Stephen();
this.selectedName = this.stephen.firstName;
}
ngOnInit() {
}
updateName(selectedName: string): void {
console.log('in parent');
this.selectedName = selectedName;
}
}
import { Component, OnInit, ViewEncapsulation, Input, Output, EventEmitter } from '@angular/core';
import { Stephen } from '../../stephen.model';
@Component({
selector: 'app-child',
template: `
{{ stephen.firstName }}
{{ stephen.lastName }}
{{ stephen.fullName }}
`,
styleUrls: ['./child.component.css'],
encapsulation: ViewEncapsulation.None
})
export class ChildComponent implements OnInit {
@Input() stephen: Stephen;
@Output() onNameSelected: EventEmitter;
constructor() {
this.onNameSelected = new EventEmitter();
}
ngOnInit() {
}
clicked(name: string): void {
this.onNameSelected.emit(name);
}
}
子组件
import { Component, OnInit, ViewEncapsulation } from '@angular/core';
import { Stephen } from '../stephen.model';
@Component({
selector: 'app-parent',
template: `
Hello, Mr. (or Ms.): {{ selectedName }}
`,
styleUrls: ['./parent.component.css'],
encapsulation: ViewEncapsulation.None
})
export class ParentComponent implements OnInit {
stephen: Stephen;
selectedName: string;
constructor() {
this.stephen = new Stephen();
this.selectedName = this.stephen.firstName;
}
ngOnInit() {
}
updateName(selectedName: string): void {
console.log('in parent');
this.selectedName = selectedName;
}
}
import { Component, OnInit, ViewEncapsulation, Input, Output, EventEmitter } from '@angular/core';
import { Stephen } from '../../stephen.model';
@Component({
selector: 'app-child',
template: `
{{ stephen.firstName }}
{{ stephen.lastName }}
{{ stephen.fullName }}
`,
styleUrls: ['./child.component.css'],
encapsulation: ViewEncapsulation.None
})
export class ChildComponent implements OnInit {
@Input() stephen: Stephen;
@Output() onNameSelected: EventEmitter;
constructor() {
this.onNameSelected = new EventEmitter();
}
ngOnInit() {
}
clicked(name: string): void {
this.onNameSelected.emit(name);
}
}
重要-第二个解决方案
但在您的案例中,这两个组件似乎没有父子关系。如果要在两个组件之间共享数据,可以创建可共享的服务。此服务将包含和EventEmitter,需要最新更改的组件将在ngOnInit方法中向其订阅,并且具有最新数据的组件将从该可共享服务调用函数以发出该事件
可共享服务
import { Injectable, Output, EventEmitter } from '@angular/core';
@Injectable({
providedIn: 'root'
})
export class MessengerService {
@Output() change: EventEmitter<any> = new EventEmitter();
sendData(data: any): any {
this.change.emit(data);
}
}
具有新更改的组件将调用sendData方法是messenge/share-able服务,以便在需要时向事件订阅者发布新数据。我不知道您是否忘记在问题中写入新数据,但您的results.Table HTML中应该有results.query标记,并通过它调用输出。考虑到您的选择器是应用程序结果查询,它将如下所示: results.table HTML
<div *ngIf='results?.length>0'>
<table *ngIf="showResults" class='table'>
<tr>
<th>Result Name</th>
<th>Location</th>
</tr>
<tbody>
<ng-template ngFor let-results [ngForOf]='items' let-i="index">
<tr>
<td>
<span>{{result?.description}}</span>
</td>
<td>
<span>{{result?.location}}</span>
</td>
</tr>
</ng-template>
</tbody>
</table>
</div>
<app-results-query (showResults)="changeShowResults($event)"></app-results-query>
<table *ngIf="showResults">
//table stuff
</table>
您可以发布您的
结果。表组件的完整html吗?我的意思是我们想知道results.table
组件的html和results.query
是如何关联的?i、 e.如何呈现这两个组件?i、 e.父母/子女或其他。根据您的代码,我们将能够提供答案。@user2216584我已经添加了完整的结果。table谢谢您的帮助结果。table html代码很好。我要求向我们展示与results.table html和results.query html相关的代码。我指的是将这两个HTML放在一起的模板。通过查看results.query TS,您的HTML之间似乎存在父/子关系。提供将这两个HTML显示在一起的代码将使我们能够深入了解,从而为您提供更好的解决方案。@user2216584现已更新!非常抱歉,您仍然没有共享显示results.table和results.query组件之间关系的模板。让我再试一次-您有来自ResultQueryComponent的选择器,同样,您也有来自ResultTableComponent的选择器。这两个选择器在您的页面中是如何显示的?是这样的吗?通过查看共享代码,很难知道这两个组件是如何关联/呈现的。我已经将结果绑定到HTML,我已经更新了描述中的代码,因为正如我所看到的,结果表组件与结果查询组件没有任何关系。如果在results.query中发出showResults事件,则不会更改results.table中的任何内容。要执行此处的操作,results.query必须是result.table的子级,如我在上面键入的示例代码中所示。下面是一个了解输出事件用法的简单示例: