Hello,
It should not make any difference, no matter the data source used. You can test a RadComboBox bound to an SQLDatasource with our online
RadComboBox demo. The RadComboBox in this demo has entries with non-English characters, "Tradição Hipermercados" for instance, and is working correctly at my side.
What I can suggest is try to isolate only the the RadComboBox from your project and then gradually add the other functionality. This should help locate where the problem originates from.
Regards,
Ivan Danchev
Telerik
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