Hi Andy Robinson,
Your scenario is typically handled by the LoadOnDemand feature of the RadTreeView. Your tree could first be populated by the distinct States, then when you expand a State , you load the corresponding child countries and etc. You can examine this help article showing how to bind a RadTreeView via Ria Services and use the Load OnDemand feature. On the other hand, could you please point us to the example you mentioned. I cannot find any other tickets from you. Please let me know if I am missing something. Thank you in advance.
the Telerik team
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