我知道这已经有一段时间了,但我遇到了同样的问题,并希望分享我的解决方案。希望这会对某人有所帮助。
public class UpdateSourceBehavior : Behavior<System.Windows.Interactivity.TriggerBase>
{
internal const string TargetElementPropertyLabel = "TargetElement";
static UpdateSourceBehavior()
{
TargetElementProperty = DependencyProperty.Register
(
TargetElementPropertyLabel,
typeof(FrameworkElement),
typeof(UpdateSourceBehavior),
new PropertyMetadata(null)
);
}
public static readonly DependencyProperty TargetElementProperty;
[Bindable(true)]
public FrameworkElement TargetElement
{
get { return (FrameworkElement)base.GetValue(TargetElementProperty); }
set { base.SetValue(TargetElementProperty, value); }
}
public PropertyPath TargetProperty { get; set; }
protected override void OnAttached()
{
base.OnAttached();
this.InitializeMembers();
base.AssociatedObject.PreviewInvoke += this.AssociatedObject_PreviewInvoke;
}
protected override void OnDetaching()
{
base.AssociatedObject.PreviewInvoke -= this.AssociatedObject_PreviewInvoke;
base.OnDetaching();
}
private void AssociatedObject_PreviewInvoke(object sender, PreviewInvokeEventArgs e)
{
this.m_bindingExpression.UpdateSource();
}
private void InitializeMembers()
{
if (this.TargetElement != null)
{
var targetType = this.TargetElement.GetType();
var fieldInfo = targetType.GetFields(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy)
.FirstOrDefault(fi => fi.Name == this.TargetProperty.Path + "Property");
if (fieldInfo != null)
this.m_bindingExpression = this.TargetElement.GetBindingExpression((DependencyProperty)fieldInfo.GetValue(null));
else
throw new ArgumentException(string.Format("{0} doesn't contain a DependencyProperty named {1}.", targetType, this.TargetProperty.Path));
}
else
throw new InvalidOperationException("TargetElement must be assigned to in order to resolve the TargetProperty.");
}
private BindingExpression m_bindingExpression;
}
肯特,我有办法做Xamly?因为我的表单中有一个巨大的文本框,我希望当用户点击“保存”时它应该更新源文件,我不想获取所有的BE并逐个更新。 – Shimmy 2010-01-20 20:44:41
我想我会使用BindingGroup.UpdateSources()。 – Shimmy 2010-01-20 21:31:19
没有我知道的内置方式。但正如我所说的,你可以编写你自己的附加行为。 – 2010-01-21 07:55:31