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Virtualization and smooth scrolling in TreeView

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Uma
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Uma asked on 10 Dec 2019, 10:27 AM

Is it possible to have both virtualization and smooth scrolling in TreeView. Application freezes when Treeview contains more items(nearly 500) and virtualized when scrolling. TreeView item template has more controls. If we disable virtualization, Loading Treeview takes more time (in minutes) and sometimes application crashes.

Need solution to have both virtualization(for fast initial loading) and smooth scrolling.

 

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Dinko | Tech Support Engineer
Telerik team
answered on 13 Dec 2019, 08:03 AM

Hello Uma,

What you can try to increase the performance of the control is to use Load On-Demand functionality. In a few words on expanding an item, the LoadOnDemand event is fired, and you can load the child items in the event handler. This way only the child items of the expanded item will be loaded. Give this functionality a try and let me know if it works for you.

Regards,
Dinko
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Uma
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answered on 12 Feb 2020, 10:03 AM

Hi Dinko,

Thanks for your reply. In our case, treeviewitem should be expanded by default. Your suggestion will not suite.

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Dinko | Tech Support Engineer
Telerik team
answered on 17 Feb 2020, 08:01 AM

Hello Uma,

Is it possible to share the custom template of the RadTreeViewItem so I can have a better look at your set-up? You can find a sample project attached to this reply in which the RadTreeView is populated with 500 items while each item has 500 items. You can modify this project to mimic your implementation.

Regards,
Dinko
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Dinko | Tech Support Engineer
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Uma
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