每次页面加载时总是选中最后一个单选按钮。我知道它与ID有关,但我不知道如何解决。
countryArray
countryA = [{name : "Finland"}, {name : "china"},{name : "USA"}]
test.html
<form #filterForm="ngForm" (ngSubmit)="addFilter(filterForm)" autocomplete="off">
<div class="row">
<div class="col-12" style="border: 1px solid red">
<div *ngFor="let x of country">
<label for="{{x.name}}"> {{x.name}} </label>
<input type="radio" id="{{x.name}}" value="{{x.name}}" name="countries" [(ngModel)]='x.name' >
</div>
</div>
<!-- <div class="col-12" style="border: 1px solid red">b</div>
<div class="col-12" style="border: 1px solid red">c</div>
<div class="col-12" style="border: 1px solid red">D</div> -->
</div>
</form>
hh : {{filterForm.value | json}}
您应该向每个国家/地区添加一个选定的属性,以用作ngModel作为单选按钮的值:
在构造函数中:
this.country = this.country.map(item =>({ name: item.name , selected : false }));
使用html:
<div class="col-12" style="border: 1px solid red">
<div *ngFor="let x of country; index as i">
<label for="{{x.name}}"> {{x.name}} </label>
<input type="radio" id="{{x.name}}" value="{{x.name}}" name="countries" [(ngModel)]="country[i].selected">
</div>
</div>
检查demo。
您正在将ngModel
应用于'x.name',这是对其进行检查的原因。您可以创建变量selectedRadio
并分配单选按钮的值:
<div *ngFor="let x of country">
<label for="{{x.name}}"> {{x.name}} </label>
<input type="radio"
id="{{x.name}}"
value="{{x.name}}"
[(ngModel)] ="selectedRadio"
name="countries">
</div>
<p> {{ selectedRadio | json }} </p>
TypeScript:
selectedRadio: any;