I'm a bit confused with your requirements. Could you try to explain what exactly is the issue?
You state that "everything works the way it is mentioned in the example except that the second combo box gets cleared when i select something from the second combo box
", do you want to append the new added items to the existing ones?
In case you are using requestItems
client-side method, you should set the second parameter to true
and the previously added items won't be cleared.
All the best,
the Telerik team
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