C#如何在RowHeader显示字符串和图标

{   

if (e.RowIndex >= 0 && e.ColumnIndex == -1)

{

Rectangle newRect = new Rectangle(e.CellBounds.X, e.CellBounds.Y, e.CellBounds.Height, e.CellBounds.Height);

//新建一个图标

System.Drawing.Icon ico = new Icon("F:\\xx.ico");

using (Brush gridBrush = new SolidBrush(this.dataGridView1.GridColor),

backColorBrush = new SolidBrush(e.CellStyle.BackColor))

{

using (Pen gridLinePen = new Pen(gridBrush,2))

        {

            // Erase the cell.

            e.Graphics.FillRectangle(backColorBrush, e.CellBounds);        

            //划线

            Point p1 = new Point(e.CellBounds.Left+e.CellBounds.Width, e.CellBounds.Top);

            Point p2 = new Point(e.CellBounds.Left+e.CellBounds.Width, e.CellBounds.Top+e.CellBounds.Height);

            Point p3 = new Point(e.CellBounds.Left,e.CellBounds.Top+ e.CellBounds.Height);

            Point[] ps = new Point[]{p1,p2,p3};

            e.Graphics.DrawLines(gridLinePen,ps);

            //画图标

            e.Graphics.DrawIcon(ico, newRect);

            //画字符串

            e.Graphics.DrawString("123", e.CellStyle.Font, Brushes.Crimson, e.CellBounds.Left + 20, e.CellBounds.Top, StringFormat.GenericDefault);

            e.Handled = true;

          }

      }

}

}

if (e.RowIndex >= 0 && e.ColumnIndex == 0)

{

e.Graphics.DrawString("A", this.dataGridView1.Font, Brushes.Red, 20, e.CellBounds.Top + 5);

}

//”A”则被-1（即RowHeader）列覆盖。

if (e.RowIndex >= 0 && e.ColumnIndex == -1)

{

e.Graphics.DrawString("A", this.dataGridView1.Font, Brushes.Red, 20, e.CellBounds.Top + 5);

}

//XX图片在-1（即RowHeader）列之上

if (e.RowIndex >= 0 && e.ColumnIndex == 0)

{

Image img = Image.FromFile(@"F:\xx.bmp");

    e.Graphics.DrawImage(img, 0, e.CellBounds.Top);

}

//XX图片被-1（即RowHeader）列覆盖

if (e.RowIndex >= 0 && e.ColumnIndex == -1)

{

Image img = Image.FromFile(@"F:\xx.bmp");

e.Graphics.DrawImage(img, 0, e.CellBounds.Top);

}

//XX图片被-1（即RowHeader）列覆盖

if (e.RowIndex >= 0 && e.ColumnIndex == -1)

{

Image img = Image.FromFile(@"F:\xx.bmp");

e.Graphics.DrawImage(img, e.CellBounds.Left, e.CellBounds.Top);

}

//XX图片被0列覆盖

if (e.RowIndex >= 0 && e.ColumnIndex == 0)

{

Image img = Image.FromFile(@"F:\xx.bmp");

e.Graphics.DrawImage(img, e.CellBounds.Left, e.CellBounds.Top);