Hi Herbert,
we have checked the reported issue on our end. We suspect that you are not
including the required namespace that why the reported issue occurs. By default,
the SfTreeView.GetItemInfo() present in the Syncfusion.UI.Xaml.TreeView.Helpers
namespace. Here, we have attached the tested sample and a video demo for your
reference. Please have a look at this. Could you please confirm if we missed
anything?
Regards,
Dhanasekar M.
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Attachment:
Sample_ec6e942b.zip