To be able to show the EmptyMessage
two conditions must be satisfied:
1. No item is selected;
2. RadComboBox is blurred;
So when you select an item and commit a postback, the selected item still remains. To be able to show the EmptyMessage after postback you'll need to clear the selection of an item and cause the RadComboBox to loose it's focus (blur).
Here is the code to do this:
sender, EventArgs e)
Find the full code in the attached .zip file.
All the best,
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items.