在Silverlight中提交聚焦元素

Question

我需要强制Silverlight提交聚焦元素的代码（在我的例子中是TextBox，但它可以是任何东西）。在WPF中我使用

public static void CommitFocusedElement() {
    UIElement element = Keyboard.FocusedElement as UIElement;
    if (element != null) {
        TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);
        FocusNavigationDirection directionBack = FocusNavigationDirection.Previous;
        if (!element.MoveFocus(request)) {                    
            request = new TraversalRequest(FocusNavigationDirection.Previous);
            directionBack = FocusNavigationDirection.Next;
            element.MoveFocus(request);
        }
        if (element.Focusable)
        {
            element.Focus();
        }
        else
        {
            element.MoveFocus(new TraversalRequest(directionBack));
        }
    }
}

但此代码的几个部分与Silverlight不兼容。有人能指出我的Silverlight替代品吗？

Answer 1

我假设您要更新绑定的来源。如果你不是，你可能应该这样做。

BindingExpression expression = textBox1.GetBindingExpression(TextBox.TextProperty);
expression.UpdateSource();