This sample demonstrates the filtering functionalities of the DropDownList. Click the DropDownList element and then type a character in the search box. It will display the filtered list items based on the typed characters.
The DropDownList has built-in support to filter the data source, when
allowFiltering is enabled. It performs
when characters are typed in the search box. In the
filtering event, you can filter down the data source and
return the resulted data to DropDownList via
updateData method to display its list items.
This sample illustrates that, query the data source and pass the resulted data to DropDownList through the
updateData method in
More information on the filtering feature configuration can be found in the documentation section.