Hi Heiko Görig,
We have plans to introduce filtering UI to the Expression column, but I cannot say exactly when this feature will be available. You can, however, use the new generic FilterDescriptor<T> class (you can read more about it here
). You can use the expression in the GridViewExpressionColumn and programmatically build a boolean binary expression that you can use in the generic FilterDescriptor.
You can also use the new generic AggregateFunction<TElement, TResult>
and feed it the GridViewExpressionColumn's expression.
the Telerik team
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