Property Changed in DependencyProperty

Question

In a previous post I asked how to register a property as DependencyProperty. I got an answer and it works fine.

But now I want to add some Items to this DependencyP

Answer 1

OnChartEntriesChanged callback will be called when you will set the new instance of the ObservableCollection. You will have to listen to collection changed as below:

    private static void OnChartEntriesChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        ((ObservableCollection)e.OldValue).CollectionChanged -= new System.Collections.Specialized.NotifyCollectionChangedEventHandler(ChartView_CollectionChanged);   
        ((ObservableCollection)e.NewValue).CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(ChartView_CollectionChanged);   
    }

    static void ChartView_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
    {

    }