This is not a built-in feature, however a possible ‘hack’ to get this visual result would be to use ValueRows in the FixedHeaders section to display the frozen rows. You would then need to set the corresponding DataRows as invisible otherwise they would appear twice in your grid.
While Grouping would still be possible, those frozen rows would remain in the FixedHeaders and would not appear in their corresponding group, unless you toggle to visibility of their DataRow counterpart to display them when a grouping is present.
Imported from legacy forums. Posted by Diane [Xceed] (had 1370 views)