WPF将依存属性绑定到ObservableCollection[重复]

但是,当我向根集合中添加此依赖项属性绑定的项时,我没有得到任何更新。

你不应该这样做。这个 PropertyChangedCallback 仅当依赖项属性 它本身 设置为新值。当您添加 MyObject

CollectionChanged 如果您想在添加或删除项目时执行某些操作,则为集合设置事件,例如:

private static void MasterListChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
    var newCol = e.NewValue as INotifyCollectionChanged;
    if (newCol != null)
    {
        newCol.CollectionChanged += Coll_CollectionChanged;
    }

    var oldCol = e.OldValue as INotifyCollectionChanged;
    if (oldCol != null)
    {
        oldCol.CollectionChanged -= Coll_CollectionChanged;
    }
}

private static void Coll_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
    //do something...
}