程序代码：

private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
        {
            if (e.RowIndex == 0 && e.ColumnIndex >= 0)
            {
                int left = e.CellBounds.Left;
                int top = e.CellBounds.Top;
                int right = e.CellBounds.Right;
                int bottom = e.CellBounds.Bottom;
                e.Graphics.FillRectangle(new SolidBrush(Color.White), e.CellBounds);
                e.Handled = true;
                Brush gridBrush = new SolidBrush(this.dataGridView1.GridColor);
                Pen gridLinePen = new Pen(gridBrush);
                e.Graphics.DrawLine(gridLinePen, right - 1,
                           top, right - 1,
                           bottom - 1);
                e.Graphics.DrawLine(gridLinePen, left,
                           bottom - 1, right,
                           bottom - 1);

                Brush b1 = new SolidBrush(Color.Black);
                e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,
                                        b1, left + 2,
                                        top + 1, StringFormat.GenericDefault);

                Brush b2 = new SolidBrush(Color.Red);
                e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,
                                        b2, left + 2,
                                        top + 10, StringFormat.GenericDefault);
            }

            DataGridViewSelectedCellCollection dgvscc = this.dataGridView1.SelectedCells;
            foreach (DataGridViewCell dgvc in dgvscc)
            {
                    if (e.RowIndex == 0
                        && e.RowIndex == dgvc.RowIndex
                        && e.ColumnIndex == dgvc.ColumnIndex)
                    {
                        int left = e.CellBounds.Left;
                        int top = e.CellBounds.Top;
                        int right = e.CellBounds.Right;
                        int bottom = e.CellBounds.Bottom;
                        // 绘制背景，覆盖单元格区域
                        e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(10,36,106)), e.CellBounds);
                       
                        // 绘制边框
                        Brush gridBrush = new SolidBrush(this.dataGridView1.GridColor);
                        Pen gridLinePen = new Pen(gridBrush);
                        e.Graphics.DrawLine(gridLinePen, right - 1,
                                   top, right - 1,
                                   bottom - 1);
                        e.Graphics.DrawLine(gridLinePen, left,
                                   bottom - 1, right,
                                   bottom - 1);

                        // 绘制文字
                        Brush b1 = new SolidBrush(Color.White);
                        e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,
                                                b1, left + 2,
                                                top + 1, StringFormat.GenericDefault);

                        Brush b2 = new SolidBrush(Color.White);
                        e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,
                                                b2, left + 2,
                                                top + 10, StringFormat.GenericDefault);
                    }
            }

            e.Handled = true;           

        }