如何在角度材料中获取复选框数据 [英] How to get checkbox data in angular material

问题描述

我想在用户选择时获取所有复选框项目，现在正在获取数据但问题是复选框不会改变，我的意思是当我单击复选框时，如果选中了初始状态，则始终保持检查，反之亦然.

this.settings_data = ["一", "二", "三", "四", "五"];<div class="settings_head" fxFlex="50" *ngFor="let item of settings_data"><mat-checkbox formControlName="settingsCheckboxvalues" (ngModelChange)="seleteditems($event,item)">{{item}}</mat-checkbox>

选择项(事件，值){this.allitems.push(value);}

解决方案

我认为你把事情复杂化了.

修改你的数组，使每个条目都有一个 name 和一个 checked 属性，并用 [(ngModel)]

<小时>

ts

array = [{name: '一个',检查:错误},{name: '二',检查:错误},{name: '三',检查:错误},{name: '四',检查:错误},{name: '五',检查:错误}]获取复选框(){console.log(this.array.filter(x => x.checked === true).map(x => x.name));}

<小时>

html

<mat-checkbox [(ngModel)]="item.checked" (change)="getCheckboxes()">{{item.name}}</mat-checkbox>

<小时>

演示

I want to get the all checkboxes items when user selects, now am getting the data But the problem is that the checkbox don't change, I mean that when I click the checkbox, if the initial state is checked, always remain checked and vice versa.

this.settings_data = ["one", "two", "three", "four", "five"];

<div class="settings_head" fxFlex="50" *ngFor="let item of settings_data">
  <mat-checkbox formControlName="settingsCheckboxvalues" (ngModelChange)="seleteditems($event,item)">{{item}}</mat-checkbox>
</div>



seleteditems(event, value) {
  this.allitems.push(value);
}

解决方案

I think you are overcomplicating things.

Modify your array so that each entry has a name and a checked property, and bind the checkboxes to them with [(ngModel)]

---

ts

array = [
    {
      name: 'one',
      checked: false
    },
    {
      name: 'two',
      checked: false
    },
    {
      name: 'three',
      checked: false
    },
    {
      name: 'four',
      checked: false
    },
    {
      name: 'five',
      checked: false
    }
  ]
  getCheckboxes() {
    console.log(this.array.filter(x => x.checked === true).map(x => x.name));
  }

---

html

<div *ngFor="let item of array">
    <mat-checkbox [(ngModel)]="item.checked" (change)="getCheckboxes()">{{item.name}}</mat-checkbox>
</div>

---

Demo

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