如何使用 angular 中的 ng-bootstrap 将数据模态组件传递给父组件 4

How to pass data modal Component to parent Component using ng-bootstrap in angular 4

我尝试了以下编码,将数据从模态组件传递到父组件。

package.json

"@ng-bootstrap/ng-bootstrap": "^1.0.0-beta.3"

app.component.html

<button class="btn btn-primary" (click)="openModal()">Open</button>

app.component.ts

import { NgbModal, NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';

export class AppComponent {

   constructor(private modalService: NgbModal) { }

    openModal() {
        const modalRef = this.modalService.open(AppModalComponent);
    }
}

app-modal.component.html

<h1>{{data}}</h1>
<button class="btn btn-primary" (click)="addMe()"></button>

app-modal.component.ts

import { Component, Output, EventEmitter } from '@angular/core';

export class AppModalComponent {
    private data: string;
    @Output emitService = new EventEmitter();

    constructor() {
        this.data = "hello world";
    }

    addMe() {
        this.emitService.next(this.data)
    }
}

emit后如何获取父组件(app.component)中的数据??

您可以像这样订阅 emitService @Output

openModal() {
     const modalRef = this.modalService.open(AppModalComponent);
     modalRef.componentInstance.emitService.subscribe((emmitedValue) => {
         // do sth with emmitedValue
     });
}

虽然上面的方法可行,但请注意,使用您想要 return 的值关闭模态通常更容易。这将解决 modalRef 上可用的承诺。

中的更多详细信息