如何在角度2中綁定雙向單選按鈕

Question

這是我的代碼，在姓氏中，我使用了ngModel，因此它使用雙向數據綁定，但在單選按鈕中我是如何使用ngModel進行雙向數據綁定的。

   <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

對於雙向數據綁定，它與所有其他數據一樣使用此語法[(ngModel)]

用下面的代碼塊替換：

<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

你可以試試這個

 <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，您忘記在輸入中添加[value]屬性，並將input的name更改為gender