C# DataGridView合并单元格

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DataGridView合并单元格:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Data;
using System.Web.UI.WebControls;
namespace  GridView_Web
{
    class Girdview
    {
        #region 合并单元格 合并某一行的所有列
        public static void GroupRow(GridView gridView)
        {
            for (int rowIndex = gridView.Rows.Count - 2; rowIndex >= 0; rowIndex--)
            {
                GridViewRow row = gridView.Rows[rowIndex];
                GridViewRow previousRow = gridView.Rows[rowIndex + 1];
                for (int i = 0; i < row.Cells.Count; i++)
                {
                    if (row.Cells[i].Text == previousRow.Cells[i].Text)
                    {
                        row.Cells[i].RowSpan = previousRow.Cells[i].RowSpan < 2 ? 2 :
                                               previousRow.Cells[i].RowSpan + 1;
                        previousRow.Cells[i].Visible = false;
                    }
                }
            }
        }
        ///　 <summary>　
        ///　 合并GridView中某行相同信息的行（单元格）
        ///　 </summary>　
        ///　 <param　 name="GridView1">GridView对象</param>　
        ///　 <param　 name="cellNum">需要合并的行</param>
        public static void GroupRow(GridView gridView, int rows)
        {
            TableCell oldTc = gridView.Rows[rows].Cells[0];
            for (int i = 1; i < gridView.Rows[rows].Cells.Count; i++)
            {
                TableCell tc = gridView.Rows[rows].Cells[i];　 //Cells[0]就是你要合并的列
                if (oldTc.Text == tc.Text)
                {
                    tc.Visible = false;
                    if (oldTc.ColumnSpan == 0)
                    {
                        oldTc.ColumnSpan = 1;
                    }
                    oldTc.ColumnSpan++;
                    oldTc.VerticalAlign = VerticalAlign.Middle;
                }
                else
                {
                    oldTc = tc;
                }
            }
        }
        #endregion
        #region 合并单元格 合并一行中的几列
        /// <summary>
        /// 合并单元格 合并一行中的几列
        /// </summary>
        /// <param name="GridView1">GridView ID</param>
        /// <param name="rows">行</param>
        /// <param name="sCol">开始列</param>
        /// <param name="eCol">结束列</param>
        public static void GroupRow(GridView gridView, int rows, int sCol, int eCol)
        {
            TableCell oldTc = gridView.Rows[rows].Cells[sCol];
            for (int i = 1; i < eCol - sCol; i++)
            {
                TableCell tc = gridView.Rows[rows].Cells[i + sCol];　 //Cells[0]就是你要合并的列
                tc.Visible = false;
                if (oldTc.ColumnSpan == 0)
                {
                    oldTc.ColumnSpan = 1;
                }
                oldTc.ColumnSpan++;
                oldTc.VerticalAlign = VerticalAlign.Middle;
            }
        }
        #endregion
        #region 合并单元格 合并某一列所有行
        /// <summary>
        /// 合并GridView中某列相同信息的行（单元格）
        /// </summary>
        /// <param name="GridView1"></param>
        /// <param name="cellNum"></param>
        public static void GroupCol(GridView gridView, int cols)
        {
            if (gridView.Rows.Count < 1 || cols > gridView.Rows[0].Cells.Count - 1)
            {
                return;
            }
            TableCell oldTc = gridView.Rows[0].Cells[cols];
            for (int i = 1; i < gridView.Rows.Count; i++)
            {
                TableCell tc = gridView.Rows[i].Cells[cols];
                if (oldTc.Text == tc.Text)
                {
                    tc.Visible = false;
                    if (oldTc.RowSpan == 0)
                    {
                        oldTc.RowSpan = 1;
                    }
                    oldTc.RowSpan++;
                    oldTc.VerticalAlign = VerticalAlign.Middle;
                }
                else
                {
                    oldTc = tc;
                }
            }
        }
        #endregion
        #region 合并单元格 合并某一列中的某些行
        /// <summary>
        /// 合并单元格 合并某一列中的某些行
        /// </summary>
        /// <param name="GridView1">GridView ID</param>
        /// <param name="cellNum">列</param>
        /// <param name="sRow">开始行</param>
        /// <param name="eRow">结束列</param>
        public static void GroupCol(GridView gridView, int cols, int sRow, int eRow)
        {
            if (gridView.Rows.Count < 1 || cols > gridView.Columns.Count - 1)
            {
                return;
            }
            TableCell oldTc = gridView.Rows[sRow].Cells[cols];
            for (int i = 1; i < eRow - sRow; i++)
            {
                TableCell tc = gridView.Rows[sRow + i].Cells[cols];
                tc.Visible = false;
                if (oldTc.RowSpan == 0)
                {
                    oldTc.RowSpan = 1;
                }
                oldTc.RowSpan++;
                oldTc.VerticalAlign = VerticalAlign.Middle;
            }
        }
        #endregion
     }
    
}