如何在角度2中绑定双向单选按钮

Question

这是我的代码，在姓氏中，我使用了ngModel，因此它使用双向数据绑定，但在单选按钮中我是如何使用ngModel进行双向数据绑定的。

   <div class="form-group" [ngClass]="{ 'has-error': f.submitted && !lastname.valid }">
                    <label for="lastname">Last Name</label>
                    <input type="text" class="form-control" name="last_name" [(ngModel)]="employee.last_name" #lastname="ngModel" required />
                    <div *ngIf="f.submitted && !lastname.valid" class="help-block">Last Name is required</div>
                </div>
                <div class="form-group">
                    <label>Gender:</label> &nbsp;
                    <label class="radio-inline">
                    <input type="radio" name="optradio" [checked]="employee.gender == 'Male'" >Male
                </label>
                    <label class="radio-inline">
                     <input type="radio" name="optradio" [checked]="employee.gender == 'Female'" >Female
                </label>
                </div>

Answer 1

对于双向数据绑定，它与所有其他数据一样使用此语法[(ngModel)]

用下面的代码块替换：

<div class="form-group">
    <label>Gender:</label> 
    &nbsp;

    <label class="radio-inline">
        <input type="radio" name="optradio" value='Male' [(ngModel)]="employee.gender" >Male
    </label>

    <label class="radio-inline">
        <input type="radio" name="optradio" value='Female' [(ngModel)]="employee.gender" >Female
    </label>

</div>

Answer 2

你可以试试这个

 <div class="form-group">
                    <label>Gender:</label> &nbsp;
                    <label class="radio-inline">
                    <input type="radio" name="gender" [(ngModel)]="employee.gender"
[value]='Male' [checked]="employee.gender == 'Male'" >Male
                </label>
                    <label class="radio-inline">
                     <input type="radio" name="gender" [(ngModel)]="employee.gender"
[value]='Female' [checked]="employee.gender == 'Female'" >Female
                </label>
                </div>

此外，您忘记在输入中添加[value]属性，并将input的name更改为gender