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DataGridView合并单元格(多行多列合并)

一、点击在拖入的显示控件(TreeList)右上方的箭头,在Treelist任务中选择数据源,添加项目数据源,依次选择数据库、数据集,新建连接,浏览选择数据库(*.mdb),依次点击 下一步,选择“表”,完成。

二、具体代码如下:

        #region"合并单元格(多行多列)"        //需要(行、列)合并的所有列标题名        List<String> colsHeaderText_V = new List<String>();        List<String> colsHeaderText_H = new List<String>();        private void InitFormatColumns()        {            colsHeaderText_V.Add("PHONE1");            colsHeaderText_V.Add("PHONE2");            colsHeaderText_H.Add("IMAGEINDEX");            colsHeaderText_H.Add("PARENTID");            colsHeaderText_H.Add("DEPARTMENT");            colsHeaderText_H.Add("LOCATION");        }        //绘制单元格        private void dataGridView1_CellPainting(object sender, System.Windows.Forms.DataGridViewCellPaintingEventArgs e)        {            foreach (string fieldHeaderText in colsHeaderText_H)            {                //纵向合并                if (e.ColumnIndex >= 0 && this.dataGridView1.Columns[e.ColumnIndex].HeaderText == fieldHeaderText && e.RowIndex >= 0)                {                    using (                        Brush gridBrush = new SolidBrush(this.dataGridView1.GridColor),                        backColorBrush = new SolidBrush(e.CellStyle.BackColor))                    {                        using (Pen gridLinePen = new Pen(gridBrush))                        {                            // 擦除原单元格背景                            e.Graphics.FillRectangle(backColorBrush, e.CellBounds);                            /****** 绘制单元格相互间隔的区分线条,datagridview自己会处理左侧和上边缘的线条,因此只需绘制下边框和和右边框                             DataGridView控件绘制单元格时,不绘制左边框和上边框,共用左单元格的右边框,上一单元格的下边框*****/                            //不是最后一行且单元格的值不为null                            if (e.RowIndex < this.dataGridView1.RowCount - 1 && this.dataGridView1.Rows[e.RowIndex + 1].Cells[e.ColumnIndex].Value != null)                            {                                //若与下一单元格值不同                                if (e.Value.ToString() != this.dataGridView1.Rows[e.RowIndex + 1].Cells[e.ColumnIndex].Value.ToString())                                {                                    //下边缘的线                                    e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1,                                    e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);                                    //绘制值                                    if (e.Value != null)                                    {                                        e.Graphics.DrawString(e.Value.ToString(), e.CellStyle.Font,                                            Brushes.Crimson, e.CellBounds.X + 2,                                            e.CellBounds.Y + 2, StringFormat.GenericDefault);                                    }                                }                                //若与下一单元格值相同                                  else                                {                                    //背景颜色                                    //e.CellStyle.BackColor = Color.LightPink;   //仅在CellFormatting方法中可用                                    this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Style.BackColor = Color.LightBlue;                                    this.dataGridView1.Rows[e.RowIndex + 1].Cells[e.ColumnIndex].Style.BackColor = Color.LightBlue;                                    //只读(以免双击单元格时显示值)                                    this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].ReadOnly = true;                                    this.dataGridView1.Rows[e.RowIndex + 1].Cells[e.ColumnIndex].ReadOnly = true;                                }                            }                            //最后一行或单元格的值为null                            else                            {                                //下边缘的线                                e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1,                                    e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);                                //绘制值                                if (e.Value != null)                                {                                    e.Graphics.DrawString(e.Value.ToString(), e.CellStyle.Font,                                        Brushes.Crimson, e.CellBounds.X + 2,                                        e.CellBounds.Y + 2, StringFormat.GenericDefault);                                }                            }                            ////左侧的线()                            //e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left,                            //    e.CellBounds.Top, e.CellBounds.Left,                            //    e.CellBounds.Bottom - 1);                            //右侧的线                            e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1,                                e.CellBounds.Top, e.CellBounds.Right - 1,                                e.CellBounds.Bottom - 1);                            //设置处理事件完成(关键点),只有设置为ture,才能显示出想要的结果。                            e.Handled = true;                        }                    }                }            }            foreach (string fieldHeaderText in colsHeaderText_V)            {                //横向合并                if (e.ColumnIndex >= 0 && this.dataGridView1.Columns[e.ColumnIndex].HeaderText == fieldHeaderText && e.RowIndex >= 0)                {                    using (                        Brush gridBrush = new SolidBrush(this.dataGridView1.GridColor),                        backColorBrush = new SolidBrush(e.CellStyle.BackColor))                    {                        using (Pen gridLinePen = new Pen(gridBrush))                        {                            // 擦除原单元格背景                            e.Graphics.FillRectangle(backColorBrush, e.CellBounds);                            /****** 绘制单元格相互间隔的区分线条,datagridview自己会处理左侧和上边缘的线条,因此只需绘制下边框和和右边框                             DataGridView控件绘制单元格时,不绘制左边框和上边框,共用左单元格的右边框,上一单元格的下边框*****/                            //不是最后一列且单元格的值不为null                            if (e.ColumnIndex < this.dataGridView1.ColumnCount - 1 && this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex + 1].Value != null)                            {                                if (e.Value.ToString() != this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex + 1].Value.ToString())                                {                                    //右侧的线                                    e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top,                                        e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);                                    //绘制值                                    if (e.Value != null)                                    {                                        e.Graphics.DrawString(e.Value.ToString(), e.CellStyle.Font,                                            Brushes.Crimson, e.CellBounds.X + 2,                                            e.CellBounds.Y + 2, StringFormat.GenericDefault);                                    }                                }                                //若与下一单元格值相同                                  else                                {                                    //背景颜色                                    //e.CellStyle.BackColor = Color.LightPink;   //仅在CellFormatting方法中可用                                    this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Style.BackColor = Color.LightPink;                                    this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex + 1].Style.BackColor = Color.LightPink;                                    //只读(以免双击单元格时显示值)                                    this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].ReadOnly = true;                                    this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex + 1].ReadOnly = true;                                }                            }                            else                            {                                //右侧的线                                e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top,                                    e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);                                //绘制值                                if (e.Value != null)                                {                                    e.Graphics.DrawString(e.Value.ToString(), e.CellStyle.Font,                                        Brushes.Crimson, e.CellBounds.X + 2,                                        e.CellBounds.Y + 2, StringFormat.GenericDefault);                                }                            }                            //下边缘的线                            e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1,                                                        e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);                            e.Handled = true;                        }                    }                }            }        }        #endregion

  

DataGridView合并单元格(多行多列合并)