using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Web.UI.WebControls;
/// <summary>
///GridViewMergeCell 合并GridView liyang 20090916
/// </summary>
public class GridViewMergeCell
{public GridViewMergeCell(){////TODO: 在此处添加构造函数逻辑//
    }#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
}

转自 http://blog.csdn.net/xinshi9608/article/details/5642382