This isn't a feature supported by the datagrid at the moment, but it is something that we are considering as part of a group of "Excel-like" features. How is your datagrid to be wired to the datasource, and what would you like the datagrid to do to the datasource if a row is dragged to a new position?
By any chance, are you asking for this feature so some rows can be "pinned" to be always visible?
Odi Kosmatos
VP, R&D, Xceed