Items appear with a delay when scrolling

[Alex]

Hello.

I'm using DataBoundListBox to show some items. The amount of these items can be from 50 to 200. But when I'm scrolling down or up the listbox then little freezes happen. Items show up with some delay. And this doesn't depends on items amount.
How to prevent these delays?

Thanks.

[Alex]

The problem solved. I've used UserControl as a part of DataTemplate and this impacted on the performance of the listbox.

[Deyan]

Hi Alex,

Thanks for writing.

Indeed, using UserControl within an ItemTemplate in RadDataBoundListBox is not recommended since its XAML will be parsed each time the UserControl instance is loaded. This makes a significant performance impact. You can use Control instances instead of UserControls.

Let me know if you have further questions.

All the best,
Deyan
the Telerik team