First you show do this;
dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
this way users will select the full row instead of the cells. then you can have the selected rows by an foreach loop.
foreach (DataGridViewRow r in dataGridView1.SelectedRows)
{
}
-OR-
2nd way
Check the
MSDN selected row link[
^]
Good luck