如何动态绑定复选框Angular 2的值 [英] How to dynamically bind the value of a checkbox Angular 2

问题描述

大家好:我有一个组件.组件视图有一个表:

Hi all: I have a component. The component view has a table:

<div class="container">
<h2>Recipients List</h2>
<br>
<table class="table table-striped">
    <thead>
        <tr>
            <th>Id</th>
            <th>Name</th>
            <th>Phone</th>
            <th>Status</th>
            <th>Select</th>
        </tr>
    </thead>
    <tbody>
        <tr *ngFor="#rp of arrAll">   
            <td>{{rp.id}}</td>             
            <td>{{rp.name}}</td>
            <td>{{rp.phone}}</td>                
            <td>{{rp.isActivated?'Active':'Inactive'}}</td>             
            <td>
                <input #{{rp.id}}  type="checkbox" (change)="checkbox(value)">
            </td>
        </tr>          
    </tbody>
</table>

<button class="btn btn-success" (click)="newRecipient()">New Recipient</button>
<button class="btn btn-danger pull-right" (click) ="deleteRecipients()">Delete Recipients</button>

此处是指向表格视图的图像的链接，该图像是使用* ngFor.

Here is a link to an image of the table view which was generated using *ngFor.

业务逻辑是单击删除按钮时，必须删除所有选中的收件人".我想将参数传递给我的delete函数(我认为应该是包含已检查的收件人ID的数组)

The business logic is "When the delete button is clicked all the checked recipients must be deleted". I want to pass a parameter to my delete function (which I think should be an array containing the checked recipient ids)

这是我的组件代码:

import {Component} from 'angular2/core';
import {CORE_DIRECTIVES} from 'angular2/common';
import { Router, RouteParams } from 'angular2/router';
import {RecipientsService}    from'../../services/recipients/recipients.service';
import {Recipient} from '../../models/recipient/recipient';

@Component({
selector: 'recipient-list-view',
templateUrl: './app/components/recipient-list-view/recipient-list-view.html',
styleUrls: ["./app/components/recipient-list-view/style.css"]
})

export class RecipientListViewComponent {

arrAll: Recipient[];

constructor(private recipientsService: RecipientsService, params:    RouteParams, private router: Router) {
    this.arrAll = recipientsService.getAll();        
}

newRecipient() {
    this.router.navigate(['../NewRecipient']);
}

deleteRecipients() {  //need to know which recipients are checked

    console.log("delete");
}


}

我想知道如何实现这一目标.

I would like to know how to achieve this.

欢呼

推荐答案

向接收者添加属性selected.在复选框更改上，将其设置为true.

Add a property selected to your recipient. On the checkbox change, put it as true.

一旦用户单击删除所有收件人，只需为选定的收件人过滤列表.

Once the user clicks delete all recipients, just filter the list for the ones who are selected.

类似这样的东西:

<div class="container">
    <h2>Recipients List</h2>
    <br>
    <table class="table table-striped">
        <thead>
            <tr>
                <th>Id</th>
                <th>Name</th>
                <th>Phone</th>
                <th>Status</th>
                <th>Select</th>
            </tr>
        </thead>
        <tbody>
            <tr *ngFor="#rp of arrAll">   
                <td>{{rp.id}}</td>             
                <td>{{rp.name}}</td>
                <td>{{rp.phone}}</td>                
                <td>{{rp.isActivated?'Active':'Inactive'}}</td>             
                <td>
                    <input #{{rp.id}}  [(ngModel)]="rp.selected" type="checkbox" (change)="checkbox(rp)">
                </td>
            </tr>          
        </tbody>
    </table>

    <button class="btn btn-success" (click)="newRecipient()">New Recipient</button>
    <button class="btn btn-danger pull-right" (click) ="deleteRecipients()">Delete Recipients</button>
</div>

以及组件:

export class RecipientListViewComponent {

     arrAll: Recipient[];

     constructor(private recipientsService: RecipientsService, params: RouteParams, private router: Router) {
        this.arrAll = recipientsService.getAll();        
    }

    newRecipient() {
        this.router.navigate(['../NewRecipient']);
    }

    deleteRecipients() {  //need to know which recipients are checked
        let selected = this.arrAll.filter((x) => x.selected)
        console.log(selected);
    }

    checkbox(recipient) {
        recipient.selected = (recipient.selected) ? false : true;
    }
}

这篇关于如何动态绑定复选框Angular 2的值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！