DataGridView合并表头实现

在网上找到这段代码先收藏一下。自己要显示的效果

也是根据下面一段代码改变过来的。所以标记一下。

二维表头的实现

       int top = 0;
        int left = 0;
        int height = 0;
        int width1 = 0;
        private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
        {
            #region 重绘datagridview表头
            DataGridView dgv = (DataGridView)(sender);
            if (e.RowIndex == -1 && (e.ColumnIndex == 3 || e.ColumnIndex == 4))
            {

                //e.CellStyle.Font = new Font(dataGridView1.DefaultCellStyle.Font, FontStyle.Bold);
                //e.CellStyle.WrapMode = DataGridViewTriState.True;
                if (e.ColumnIndex == 3)
                {
                    top = e.CellBounds.Top;
                    left = e.CellBounds.Left;
                    height = e.CellBounds.Height;
                    width1 = e.CellBounds.Width;
                }

                int width2 = this.dataGridView1.Columns[4].Width;

                Rectangle rect = new Rectangle(left, top, width1 + width2, e.CellBounds.Height);
                using (Brush backColorBrush = new SolidBrush(e.CellStyle.BackColor))
                {
                    //抹去原来的cell背景
                    e.Graphics.FillRectangle(backColorBrush, rect);
                }

                using (Pen gridLinePen = new Pen(dgv.GridColor))
                {
                    e.Graphics.DrawLine(gridLinePen, left, top, left + width1 + width2, top);
                    e.Graphics.DrawLine(gridLinePen, left, top + height / 2, left + width1 + width2, top + height /

2);
                    e.Graphics.DrawLine(gridLinePen, left + width1, top + height / 2, left + width1, top + height);

                    //计算绘制字符串的位置
                    string columnValue = "Year";
                    SizeF sf = e.Graphics.MeasureString(columnValue, e.CellStyle.Font);
                    float lstr = (width1 + width2 - sf.Width) / 2;
                    float rstr = (height / 2 - sf.Height) / 2;
                    //画出文本框

                    if (columnValue != "")
                    {
                        e.Graphics.DrawString(columnValue, e.CellStyle.Font,
                                                   new SolidBrush(e.CellStyle.ForeColor),
                                                     left + lstr,
                                                     top + rstr,
                                                     StringFormat.GenericDefault);
                    }

                    //计算绘制字符串的位置
                    columnValue = "局网台资产额";
                    sf = e.Graphics.MeasureString(columnValue, e.CellStyle.Font);
                    lstr = (width1 - sf.Width) / 2;
                    rstr = (height / 2 - sf.Height) / 2;
                    //画出文本框

                    if (columnValue != "")
                    {
                        e.Graphics.DrawString(columnValue, e.CellStyle.Font,
                                                   new SolidBrush(e.CellStyle.ForeColor),
                                                     left + lstr,
                                                     top + height / 2 + rstr,
                                                     StringFormat.GenericDefault);
                    }

                    //计算绘制字符串的位置
                    columnValue = "网络资产额";
                    sf = e.Graphics.MeasureString(columnValue, e.CellStyle.Font);
                    lstr = (width2 - sf.Width) / 2;
                    rstr = (height / 2 - sf.Height) / 2;
                    //画出文本框

                    if (columnValue != "")
                    {
                        e.Graphics.DrawString(columnValue, e.CellStyle.Font,
                                                   new SolidBrush(e.CellStyle.ForeColor),
                                                     left + width1 + lstr,
                                                     top + height / 2 + rstr,
                                                     StringFormat.GenericDefault);
                    }

                }
                e.Handled = true;

            }
            #endregion
        }