By default row details are collapsed and not visible. You can use the RowDetailsVisibilityMode property to set if and when row details are visible. You can set the RowDetailsVisibilityMode property to one of the following options:

 

Option	Description
VisibleWhenSelected	Row details are only visible when selected.
Visible	Row details are always visible.
Collapsed (default)	Row details appear collapsed and are not visible.