DataGridView 操作

//dataGridView 删除选中行
int num = dataGridView2.SelectedRows.Count;
while (num > 0)
 {
      DataGridViewRow r = dataGridView2.SelectedRows[0];
      r.Selected = false;
      dataGridView2.Rows.Remove(r);
      num--;
  }
dataGridView2.Update();