Dear Radzens,
for the data grid on the string column, we discovered a malfunction if you apply the filter IsNull or IsEmpty or IsNotNull or IsNotEmpty, the grid works fine.
But export functionality to Excel throws an error when applied on SQL view (for SQL tables it is ok).
Error:
InvalidOperationException: Cannot translate the '!=' on an expression of entity type 'View' because it is a keyless entity. Consider using entity properties instead.