DataGridViewの行にマウスカーソルが上に来た時の処理方法

        private void dataGridView1_CellMouseEnter(object sender, DataGridViewCellEventArgs e)

        {

            DataGridViewCellStyle ds = new DataGridViewCellStyle();

            ds.BackColor = Color.Blue;



            DataGridView dgv = (DataGridView)sender;

            for (int rowIndex = 0; rowIndex < dgv.Rows.Count; rowIndex++ )

            {

                dgv.Rows[rowIndex].DefaultCellStyle = null;

            }



            if (e.RowIndex >= 0)

            {

                dgv.Rows[e.RowIndex].DefaultCellStyle = ds;

            }



        }