Scrolling bug in WPF virtualized Treeview

Question

I\'m using a virtualized treeview in WPF to display a 3 level deep hierarchy with a larger number of child nodes (5000+).

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Answer 1

have you tryed to load the items lazy?? What i mean is that you could load at first (without virtualizing) only the root nodes, and then when each one of those nodes are expanded load it's childs.

I usually use a TreeViewItemViewModelClass in this cases, something like:

public class TreeViewItemViewModel : INotifyPropertyChanged
{
    public IEnumerable<TreeViewItemViewModel> Childs { get; }
    public bool IsSelected { get; set; }
    public bool IsExpanded { get; set; }
    (...)
}

and then in the ItemContainerStyle of the TreeView with a TwoWay binding bind the IsSelected and the IsExpanded propertires, and then in the setter of the property IsExpanded you load all it's childs.

I have tested this approach, with trees that in theory have more than 5000 items but never with all the items loaded at the same time.

Hope this helps...