Row Virtualization / Rows Not Expanding

[Kyle]

Using hierarchical data - Parent > Child1 > Child2 > Child3 with Row Virtualization ON, child rows are remaining unexpanded when setting child rows to expanded that are located near the bottom of the grid.  I believe row visualization is not allowing the expanded property to remain in its state when the row is scrolled into view.

[Ivan Ivanov]

Hi,

Can you please try using ExpandHierarchyItem instead of setting IsExpanded = true. The first option caches the expanded state, so that it is correctly persisted when the UI virtualization reuses another container for this item.

Regards,
Ivan Ivanov
Progress Telerik

[Kyle]

Thanks for the suggestion.  Unfortunately, I posted in the wrong section - we're actually using TreeListView, not GridView.  Is there something similar?  Please move this thread to the correct area if it needs to be moved.

[Ivan Ivanov]

Hello,

You can use ExpnadHierarchyItem for TreeListView too, as it inherits a lot of its functionality from RadGridView. Another option of RadTreeListView is to have data logic for controlling the expanded state and and use IsExpandedBinding

Regards,
Ivan Ivanov
Progress Telerik