Angular 2 下拉选项默认值 [英] Angular 2 Dropdown Options Default Value

问题描述

在 Angular 1 中，我可以使用以下命令为下拉框选择默认选项:

In Angular 1 I could select the default option for a drop down box using the following:

<select 
    data-ng-model="carSelection"
    data-ng-options = "x.make for x in cars" data-ng-selected="$first">
</select>

在 Angular 2 中，我有:

In Angular 2 I have:

<select class="form-control" [(ngModel)]="selectedWorkout" (ngModelChange)="updateWorkout($event)">
    <option *ngFor="#workout of workouts">{{workout.name}}</option>
</select>

考虑到我的选项数据，我如何选择默认选项:

How could I select a default option given my option data is:

[{name: 'arm'}, {name: 'back'}, {name:'leg'}] 而我默认的值是 back?

推荐答案

向 selected 属性添加绑定，如下所示:

Add a binding to the selected property, like this:

<option *ngFor="#workout of workouts" 
    [selected]="workout.name == 'back'">{{workout.name}}</option>

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