datagridview的多维列头问题

Question

本人前几天在这个http://www.blogjava.net/xiekai-blog/archive/2011/03/18/282825.html地址上下了一个C#的显示二维列头的代码,生成之后在自己的工程里使用,效果还不错,但是后来我发现一个问题,就是当字段过多,出现横向滚动条之后,拉动滚动条的时候,新加入的第一列的显示很成问题,后来我在SCROLL事件里面增加了一个它提供的ReDrawHead方法,稍微好了一点,但还是成问题,就是那个字,它会一直重绘,而且它重绘的时候,感觉重绘的矩形是一直变动的,就是显示出来区域是多少,它就根据显示出来的区域进行重绘,结果就是,第一列的字段名称会跟随滚动条的移动而移动,感觉很不爽!我看了它的代码,应该就是在以下这一段里面进行修改
 protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e)
        {
            try
            {
                if (e.RowIndex > -1 && e.ColumnIndex > -1)
                {
                    DrawCell(e);
                }
                else
                {
                    //二维表头
                    if (e.RowIndex == -1)
                    {
                        if (SpanRows.ContainsKey(e.ColumnIndex)) //被合并的列
                        {
                            //画边框
                            Graphics g = e.Graphics;
                            e.Paint(e.CellBounds, DataGridViewPaintParts.Background | DataGridViewPaintParts.Border);                            int left = e.CellBounds.Left, top = e.CellBounds.Top + 2,
                            right = e.CellBounds.Right, bottom = e.CellBounds.Bottom;                            switch (SpanRows[e.ColumnIndex].Position)
                            {
                                case 1:
                                    left += 2;
                                    break;
                                case 2:
                                    break;
                                case 3:
                                    right -= 2;
                                    break;
                            }                            //画上半部分底色
                            g.FillRectangle(new SolidBrush(this._mergecolumnheaderbackcolor  ), left, top,
                            right - left, (bottom - top) / 2);                            //画中线
                            g.DrawLine(new Pen(this.GridColor), left, (top + bottom) / 2,
                            right, (top + bottom) / 2);                            //写小标题
                            StringFormat sf = new StringFormat();
                            sf.Alignment = StringAlignment.Center;
                            sf.LineAlignment = StringAlignment.Center;                            g.DrawString(e.Value + "", e.CellStyle.Font, Brushes.Black,
                            new Rectangle(left, (top + bottom) / 2, right - left, (bottom - top) / 2), sf);
                            left = this.GetColumnDisplayRectangle(SpanRows[e.ColumnIndex].Left, true).Left - 2;                            if (left < 0) left = this.GetCellDisplayRectangle(-1, -1, true).Width;
                            right = this.GetColumnDisplayRectangle(SpanRows[e.ColumnIndex].Right, true).Right - 2;
                            if (right < 0) right = this.Width;                            g.DrawString(SpanRows[e.ColumnIndex].Text, e.CellStyle.Font, Brushes.Black,
                            new Rectangle(left, top, right - left, (bottom - top) / 2), sf);
                            e.Handled = true;
                        }
                    }
                }
                base.OnCellPainting(e);
            }
            catch
            { }
        }我想,还不如不要什么重绘了,在显示新字段名的地方,直接插入一个Lable算了!可我是用vb.net写代码的,C#的不懂...哪一位能帮忙解决一下,感激!!!