Datagridview合并单元格

来源：互联网发布：淘宝导航编辑：程序博客网时间：2024/05/21 17:43
一直想把datagridview做成报表的样式，但是就得合并单元格，但是发现以前的知识没怎么用的上，后来在王少了这么一个源码，如果大家需要的话，直接复制粘贴就可以了，样式挺好看的。
private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)        {                       if (dataGridView1.Rows.Count > 0)            {                if (dataGridView1.Rows[0].Cells[0].Value.ToString().Trim() != string.Empty)                {                    try                    {                        for (int i = 0; i < dataGridView1.Rows.Count; i++)                        {                            #region MyRegion                            if (dataGridView1.Columns[i].Index == e.ColumnIndex && e.RowIndex >= 0)                            {                                using (                                    Brush gridBrush = new SolidBrush(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.RowIndex != dataGridView1.RowCount - 1)                                            {                                                if (e.Value.ToString() != 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                                                 }                                            }                                            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                                                                   }                                            //右侧的线                                            e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, //x1,y1,x2,y2                                                e.CellBounds.Top, e.CellBounds.Right - 1,                                                e.CellBounds.Bottom - 1);                                            #region MyRegion                                            if (e.RowIndex == 0)                                            {                                                //绘制第一列的值                                                if (e.Value != null)                                                {                                                    e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,                                                        Brushes.Crimson,                                                        e.CellBounds.X + (e.CellBounds.Width - e.Graphics.MeasureString(e.Value.ToString().Trim(), e.CellStyle.Font).Width) / 2,                                                        e.CellBounds.Y + 2, StringFormat.GenericDefault);                                                }                                            }                                            else                                            {                                                if (e.Value.ToString() != dataGridView1.Rows[e.RowIndex - 1].Cells[e.ColumnIndex].Value.ToString())                                                {                                                    //绘制值                                                    if (string.IsNullOrEmpty(e.Value.ToString().Trim()).Equals(false))                                                    {                                                        e.Graphics.DrawString((String)e.Value, e.CellStyle.Font,                                                            Brushes.Crimson, e.CellBounds.X + (e.CellBounds.Width - e.Graphics.MeasureString(e.Value.ToString().Trim(), e.CellStyle.Font).Width) / 2,                                                            e.CellBounds.Y + 2, StringFormat.GenericDefault);                                                    }                                                }                                            }                                            #endregion                                            e.Handled = true;                                        }                                    }                            }                            #endregion                        }                                            }                    catch { }                }            }        }        /// <summary>        /// 添加一个表格        /// </summary>        public void addDatatable()        {            DataColumn dc = new DataColumn("ID");            dt.Columns.Add(dc);            dc = new DataColumn("name");            dt.Columns.Add(dc);            dc = new DataColumn("age");            dt.Columns.Add(dc);            dc = new DataColumn("sex");            dt.Columns.Add(dc);            dt.Rows.Add(2, "上海", "5000", "7000");            dt.Rows.Add(2, "北京", "3000", "5600");            dt.Rows.Add(3, "纽约", "6000", "8600");            dt.Rows.Add(3, "华盛顿", "8000", "9000");            dt.Rows.Add(4, "伦敦", "7000", "8800");        }
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