How to search an item in a load-on-demand WPF Treeview which created by using MVVM?

Mr Josh Smith implemented a search method in his wellknown article "Simplifying the WPF TreeView by Using the ViewModel Pattern". But this is implemented on a batch-loaded WPF treeview (his first example solution "Text Search"). What
I want to know is: Is it possible to search an item in a load-on-demand WPF Treeview of MVVM pattern. In other words, is it possible to implement the searching way on Josh's second example solution "LoadOnDemand"? Thanks for your attention.
ly_he

Hi ly_he,
You have posted the same thread in the chinese forum of WPF, and I have replied. You could see here:
https://social.msdn.microsoft.com/Forums/zh-CN/029bccae-f2f0-4218-980b-2389da8e5d2c/mvvm-wpf-treeview?forum=wpfzhchs
Best Regards,
Xavier Eoro
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