Question

有没有办法以编程方式取消设置绑定？类似的东西：

myLabel.UnsetBinding(Label.TextColorProperty);

当然有必要这样做吗？

Answer 1

您正在寻找RemoveBinding()方法：https://developer.xamarin.com/api/member/Xamarin.Forms.BindableObject.RemoveBinding/p/Xamarin.Forms.BindableProperty/

对于你的例子：

myLabel.RemoveBinding(Label.TextColorProperty);

Answer 2

Binding附加到BindableProperty，而不是类。

您可以将Property设置为其他任何内容，Binding将会消失;

<form *ngIf="email" class="form-horizontal">
    <div class="form-group">
        <label for="inputBudgetCenter" class="col-sm-2 control-label">Budget Center</label>
        <div class="col-sm-10">
            <input [(ngModel)]="email.BudgetCenter" type="text" class="form-control" id="inputBudgetCenter" placeholder="Example: B001">
        </div>
    </div>
    <div class="form-group">
        <label for="inputEmail" class="col-sm-2 control-label">Email</label>
        <div class="col-sm-10">
            <input [(ngModel)]="email.EmailAddress" type="text" class="form-control" id="inputEmail" placeholder="Example: joe@clemson.edu">
        </div>
    </div>
    <div class="form-group">
        <div class="col-sm-offset-2 col-sm-10">
            <button (click)="updateRow()" type="submit" class="btn btn-default">Save</button>
        </div>
    </div>
</form>

Xamarin.Forms MVVM - 有没有办法取消绑定？

2 个答案: