I've implemented a custom ComboBoxFilteringBehavior but the list won't filter. Looks like it's because I'm using a VirtualizingStackPanel to improve rendering performance of list that contains 1,000+ items. How can I filter the ComboBox list and continue to use the VirtualizingStackPanel?
3 Answers, 1 is accepted
answered on 06 Mar 2020, 11:39 AM
Filtering is not supported when the control is virtualized. This is mentioned at the den of the Filtering article. I am afraid that currently, there is no customization via RadComboBox's API that will allow you to use both filtering and UI virtualization.
A possible approach that you can try is to subscribe to the text changed event of the TextBox presenting the RadComboBox input and when the Text property of RadComboBox is changed, to manually filter the ItemsSource of the control.
If you have other questions, please let me know.
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