If you are using a RadComboBox
you can change the Eval
expression so that a value is provided for the Text
property of the control.
By modifying the code as suggested above you should not experience any problems when firing a call to the web service to request the data.
If the above suggestion does not prove helpful please open a formal support ticket and attach a project in which the problem can be reproduced. That way we will be able to debug the code locally and further research the matter.
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