How to sort TreeView items using SortDescriptions in Xaml?

Question

I have a list of Layers binded to a TreeView where each instance has a list of Effects. I show them via a HierarchicalDataTemplate whi

Answer 1

This is not the XAML based solution, but I was facing the same problem and found the solution like below,

I am assuming you have 3 classes like below: AllLayers, Layers & Effects

class AllLayers
{
    public AllLayers()
    {
        layers = new ObservableCollection();
        var collectionView = CollectionViewSource.GetDefaultView(layers);
        collectionView.SortDescriptions.Add(new SortDescription("Name", ListSortDirection.Ascending));
        collectionView.SortDescriptions.Add(new SortDescription("Color", ListSortDirection.Ascending));
    }
    public ObservableCollection layers { get; }
}
class Layers
{
    public Layers(string name, string color)
    {
        Name = name;
        Color = color;
        CollectionViewSource.GetDefaultView(effects).SortDescriptions.Add(new SortDescription("Name", ListSortDirection.Ascending));
    }
    public string Name { get; set; }
    public string Color { get; set; }
    public ObservableCollection effects { get; }
}
class Effects
{
    public string Name { get; set; }
}

After that, your existing binding should work with sorting. No need of change to your XAML or anything.