我想这样做,默认情况下,当我绑定到我的一个依赖项属性时,绑定模式是双向的,并且update-trigger属性已更改。有没有办法做到这一点?
以下是我的一个依赖项属性的示例:
public static readonly DependencyProperty BindableSelectionLengthProperty =
DependencyProperty.Register(
"BindableSelectionLength",
typeof(int),
typeof(ModdedTextBox),
new PropertyMetadata(OnBindableSelectionLengthChanged));
答案 0 :(得分:92)
注册属性时,请使用以下命令初始化元数据:
new FrameworkPropertyMetadata
{
BindsTwoWayByDefault = true,
DefaultUpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
}
答案 1 :(得分:16)
在Dependency Property声明中,它看起来像这样:
public static readonly DependencyProperty IsExpandedProperty =
DependencyProperty.Register("IsExpanded", typeof(bool), typeof(Dock),
new FrameworkPropertyMetadata(true,
FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
OnIsExpandedChanged));
public bool IsExpanded
{
get { return (bool)GetValue(IsExpandedProperty); }
set { SetValue(IsExpandedProperty, value); }
}