In a hierarchy grid, when AutoGenerateColumns= true, this event triggers only for MasterTemplate.

In this scenario, we are using the custom approach from the How to Change PageViewMode for the Nested Levels in RadGridView KB article. When a child row is expanded and we collapse and expand its parent, an exception is thrown.

By default, in the hierarchy RadGridView, filtering the control will show the child row that matches the filtering criteria, along with its parent. The parent row itself could not match the filtering descriptor, which could lead to confusion. We could extend the current functionality of the control and expose a way to hide the parent in this case.