Hi Alep,
Currently it is not possible to apply a different theme to the child views in
RadGridView. In fact, you are the first to request this behavior. Yes, implementing this feature is possible, however it will be not easy, and we doubt that such feature will be user-friendly from usability and design perspective.
You can still change the appearance of child rows by code. You should handle
CellFormatting event for example and check whether
ViewInfo.ParentRow is not null:
Should you have any other questions, don't hesitate to ask.
Kind regards,
Jack
the Telerik team
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