private void OnItemsSourceChanged(object sender, EventArgs args)
{
if (this.recordCollection != null)
{
this.Unsubscribe();
}
this.recordCollection = this.AssociatedObject.ItemsSource as RecordCollection;
if (this.recordCollection != null)
{
this.Subscribe();
}
}
protected override void OnAttached()
{
base.OnAttached();
this.recordCollection = this.AssociatedObject.ItemsSource as RecordCollection;
var descriptor = DependencyPropertyDescriptor.FromProperty(
ItemsControl.ItemsSourceProperty,
typeof(Control));
descriptor.AddValueChanged(this.AssociatedObject, this.OnItemsSourceChanged);
if (this.recordCollection != null)
{
this.Subscribe();
}
}