如何将UI元素(如textBox)焦点绑定到视图模型?
我有带有枢轴控制的Windows Phone应用程序。基于活动的透视项目,我想将焦点设置为某个文本框。此外,当用户将文本插入文本框并按Enter键时,我想将焦点设置在除文本框之外的其他位置以关闭虚拟键盘。
如何使用Caliburn Micro查看模型?
答案 0 :(得分:2)
我认为你不能通过C.M.做到这一点。我会写一个这样的行为:
public class BindableFocusBehavior : Behavior<Control>
{
public static readonly DependencyProperty HasFocusProperty =
DependencyProperty.Register("HasFocus", typeof(bool), typeof(BindableFocusBehavior), new PropertyMetadata(default(bool), HasFocusUpdated));
private static void HasFocusUpdated(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
((BindableFocusBehavior)d).SetFocus();
}
public bool HasFocus
{
get { return (bool)GetValue(HasFocusProperty); }
set { SetValue(HasFocusProperty, value); }
}
private void SetFocus()
{
if (HasFocus)
{
AssociatedObject.Focus();
}
}
}
像这样使用:
<TextBox>
<i:Interaction.Behaviors>
<wpfApplication2:BindableFocusBehavior HasFocus="{Binding SetFocus}"/>
</i:Interaction.Behaviors>
</TextBox>
希望它有所帮助!