Datagrid debacle

Ive got an editable datagrid, and the size allows 16 rows.

It is possible for the user to add/remove a row, which would increse/decrease the myDataGrid.rowCount of the datagrid.

However, whenever a row is added/removed, the rowCount remains the same (16, which it was created with).

Is there another built-in variable other than rowCount that can gauge the ACTUAL rows in the datagrid, not just what it was created with?