C#.NET DataGridView单元格合并问题

[Mick122]

C#.NET DataGridView



请各位大虾帮帮忙，我想在已经数据的DataGridView上，把同一列下相同的单元格合并，有什么办法吗？

请指教，或者有相关单元格合并的例子，可以参考一下！

[Jack123]

 "#region"合并单元格的测试"
        private int nextrow = null;
        private int nextcol = null;
        private void dataGridView1_CellFormatting(object sender, System.Windows.Forms.DataGridViewCellFormattingEventArgs e)
        {
            if (this.dataGridView1.Columns["description"].Index == e.ColumnIndex && e.RowIndex >= 0)
            {
                if (this.nextcol != null & e.ColumnIndex == this.nextcol)
                {
                    e.CellStyle.BackColor = Color.LightBlue;
                    this.nextcol = null;
                }
                if (this.nextrow != null & e.RowIndex == nextrow)
                {
                    e.CellStyle.BackColor = Color.LightPink;
                    this.nextrow = null;
                }
                if (e.RowIndex != this.dataGridView1.RowCount - 1)
                {
                    if (e.Value.ToString() == this.dataGridView1.Rows[e.RowIndex + 1].Cells[e.ColumnIndex].Value.ToString())
                    {
                        e.CellStyle.BackColor = Color.LightPink;
                        nextrow = e.RowIndex + 1;
                    }
                }

            }
            if (this.dataGridView1.Columns["name"].Index == e.ColumnIndex && e.RowIndex >= 0)
            {
                if (e.Value.ToString() == this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex + 1].Value.ToString())
                {
                    e.CellStyle.BackColor = Color.LightBlue;
                    nextcol = e.ColumnIndex + 1;
                }
            }
        }
        //==========================
       
        //绘制单元格
        private void dataGridView1_CellPainting(object sender, System.Windows.Forms.DataGridViewCellPaintingEventArgs e)
        {

 

            //纵向合并
            if (this.dataGridView1.Columns["description"].Index == e.ColumnIndex && 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);
                        /**/////绘制线条,这些线条是单元格相互间隔的区分线条,
                        ////因为我们只对列name做处理,所以datagridview自己会处理左侧和上边缘的线条
                        if (e.RowIndex != this.dataGridView1.RowCount - 1)
                        {
                            if (e.Value.ToString() != this.dataGridView1.Rows[e.RowIndex + 1].Cells[e.ColumnIndex].Value.ToString())
                            {

                                e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1,
                                e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);//下边缘的线
                                //绘制值
                                if (e.Value != null)
                                {
                                    e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,
                                        Brushes.Crimson, e.CellBounds.X + 2,
                                        e.CellBounds.Y + 2, StringFormat.GenericDefault);
                                }
                            }
                        }
                        else
                        {
                            e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1,
                                e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);//下边缘的线
                            //绘制值
                            if (e.Value != null)
                            {
                                e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,
                                    Brushes.Crimson, e.CellBounds.X + 2,
                                    e.CellBounds.Y + 2, StringFormat.GenericDefault);
                            }
                        }
                        //右侧的线
                        e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1,
                            e.CellBounds.Top, e.CellBounds.Right - 1,
                            e.CellBounds.Bottom - 1);

                        e.Handled = true;
                    }
                }
            }

            //横向合并
            if (this.dataGridView1.Columns["name"].Index == e.ColumnIndex && 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);

                        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((String)e.Value, 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

[suners]

dingy8ixia

[mr3]

http://topic.csdn.net/u/20100609/13/4d9006e4-529e-4b30-91ae-9908f5806c58.html
楼主看下这个.前几天查这个问题的看到了这个贴.比较不错`