0
개체 모음이 포함 된 사용자 지정 WPF UserControl이 있습니다.itemsource가 업데이트되는 동안 WPF usercontrol에서 항목 컬렉션 업데이트
public class MyUserControl : UserControl
{
public readonly static DependencyProperty PointsSourceProperty =
DependencyProperty.Register("PointsSource", typeof(IEnumerable), typeof(MyUserControl), new FrameworkPropertyMetadata(null, OnPointsSourceChanged));
public IEnumerable PointsSource
{
get { return GetValue(PointsSourceProperty) as IEnumerable; }
set { SetValue(PointsSourceProperty, value); }
}
private ObservableCollection<DataPoint> _points = new ObservableCollection<DataPoint>();
public ObservableCollection<DataPoint> Points
{
get { return points; }
}
private static void OnPointsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
// Expect to update Points collection
}
}
public class DataPoint : DependencyObject
{
public readonly static DependencyProperty TimeProperty =
DependencyProperty.Register("Time", typeof(DateTime), typeof(DataPoint));
public readonly static DependencyProperty ValueProperty =
DependencyProperty.Register("Value", typeof(double), typeof(DataPoint));
public DateTime Time
{
get { return (DateTime)GetValue(DateTimeProperty); }
set { SetValue(DateTimeProperty, value); }
}
public double Value
{
get { return (double)GetValue(ValueProperty); }
set { SetValue(ValueProperty, value); }
}
}
나는 데이터 뷰 모델에서 관찰 모음입니다 같은 내 컨트롤 정의 :
<my:myUserControl PointsSource="{Binding Data}">
<my:myUserControl.Points>
<my:Point Time="{Binding TimeUtc}" Value="{Binding Value}" />
</my:myUserControl.Points>
</my:myUserControl>
내가 PointsSource 동안 포인트 수집을 업데이트 할 수있는 방법을 값이 변경 되었습니까?