单击另一个组件时组件的Angular 6输出信息

Question

我有 3 个组件： 一、客户名单 2. 客户（姓名） 3. 客户的完整信息（姓名、年龄、地址），当我点击用户项时必须显示。

而且我不明白，当我在客户列表中单击此客户时，如何获取有关特定客户的信息（如何显示第三个组件）。

这是我的代码：

1) 客户列表.component.ts：

import { Component, OnInit, Input } from '@angular/core';
import { ClientsService } from '../clients.service';
import { Client } from '../../models/client.model';  

@Component({
  selector: 'app-clients-list',
  templateUrl: './clients-list.component.html',
  styleUrls: ['./clients-list.component.css']
})
export class ClientsListComponent implements OnInit {

  public clients: Client[] = [];
  public selectedClient;
  constructor(private _clientsService: ClientsService) {}
  ngOnInit() {
    this._clientsService.getClient()
      .subscribe(data => this.clients = data);
  }

}

clients-list.component.html:

<app-client-detail *ngFor="let client of clients" [clients]="client" (clientSelected)="selectedClient=client"></app-client-detail>
<app-selected-client-details></app-selected-client-details>

2）cli​​ent-detail.component.ts：

import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';
@Component({
  selector: 'app-client-detail',
  templateUrl: './client-detail.component.html',
  styleUrls: ['./client-detail.component.css']
})
export class ClientDetailComponent implements OnInit {
  @Input() clients;
  @Output() clientSelected: EventEmitter<any> = new EventEmitter;
  constructor() {}
  ngOnInit() {}
  selectClient() {
    this.clientSelected.emit();
  }
}

client-detail.component.html:

<div (click)="selectClient()">
  <p>{{clients.name}}</p>
</div>

3) selected-client-details.component.ts:

import {Component, OnInit, Input} from '@angular/core';
@Component({
  selector: 'app-selected-client-details',
  templateUrl: './selected-client-details.component.html',
  styleUrls: ['./selected-client-details.component.css']
})
export class SelectedClientDetailsComponent implements OnInit {
  @Input() selectedClient;

  constructor() {}
  ngOnInit() {}
}

selected-client-details.component.html：

<div>
  <p>{{selectedClient?.firstName}}</p>
  <p>{{selectedClient?.age}}</p>
  <p>{{selectedClient?.address}}</p>
</div>

---

如果我的 clients-list.component.html 看起来像这样 -

<app-client-detail *ngFor="let client of clients" [clients]="client" (clientSelected)="selectedClient=client"></app-client-detail>

<div>
  <p>{{selectedClient?.firstName}}</p>
  <p>{{selectedClient?.age}}</p>
  <p>{{selectedClient?.address}}</p>
</div>

• 有效。当我点击用户时，阻止出现用户信息。但是用户的信息必须是另一个组件。还有一个问题。

我想我必须这样做：

（在 clients-list.component.html 中）

<app-client-detail *ngFor="let client of clients" class="client-item" [clients]="client" (clientSelected)="selectedClient=client"></app-client-detail>

<app-selected-client-details [???]></app-selected-client-details>

但我无法理解我该怎么做。请帮我...

Answer 1

我对您的代码做了一些更改，但首先在客户端详细信息上 selectClient 方法发出 undefined 我已修复

this.clientSelected.emit(this.client); // client was clients

clients-list.component.html 看起来像这样

<app-client-detail *ngFor="let client of clients" [client]="client" 
(clientSelected)="selectedClientComponent.selectedClient=$event"></app-client-detail>


<app-selected-client-details #selectedClientComponent></app-selected-client-details>

这就是我如何通过模板引用#selectedClientComponent 将选定的客户端发送到选定的客户端组件并将 $event 分配给 selectedClientComponent 的 selectedClient

selectedClientComponent.selectedClient=$event

$event 是发出的客户端对象

stackblitz example