Are you using LINQ or OQL or plain SQL? What is the data type of the column? If you are using LINQ and it is a character column you could write something like
var q = context.YourType.Select( t => string.IsNullOrEmpty(t.FieldName))
Do let me know if this helps or else some more information on the exact use case would help in providing a more specific answer.
All the best,
the Telerik team
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