A new request for items fires when the user types in the input area or clicks on the dropdown toggle image - in case there are no items in the RadComboBox.
I am afraid that firing a request only upon “Enter” key pressing is not a supported scenario.
However you can try using the MinFilterLength
property. This property sets the minimum length of the typed text before the control initiates a request for new items.
Please take a look at the “Load On Demand” section in the “ComboBox / Configurator
” demo – please choose the “Custom” option there, set some value at the “Minimum filter length” input and observe the RadComboBox behaviour.
All the best,
the Telerik team
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