using System; 
using System.Collections.Generic; 
using System.Text; 
 
using System.Web.UI.WebControls; 
using System.Web.UI; 
 
namespace YYControls.Helper 
{ 
        /// <summary> 
        /// SmartGridView的Helper 
        /// </summary> 
        public class SmartGridView 
        { 
                /// <summary> 
                /// 合并指定列的相邻且内容相同的单元格 
                /// </summary> 
                /// <param name="gv">GridView</param> 
                /// <param name="columnIndices">需要合并单元格的列的索引（用逗号“,”分隔）</param> 
                public static void MergeCells(GridView gv, int[] columnIndices) 
                { 
                        // 指定的列中需要设置RowSpan的单元格的行索引 
                        int[] aryInt = new int[columnIndices.Length]; 
                        // 是否重新指定aryInt的相关元素的值 
                        // aryInt中的元素与aryBln中的元素一一对应 
                        bool[] aryBln = new bool[columnIndices.Length]; 
                        // aryInt初值均为0 
                        for (int i = 0; i < aryInt.Length; i++) 
                        { 
                                aryInt[i] = 0; 
                        } 
                        // aryBln初值均为true 
                        for (int i = 0; i < aryBln.Length; i++) 
                        { 
                                aryBln[i] = true; 
                        } 
 
                        for (int i = 1; i < gv.Rows.Count; i++) 
                        { 
                                // 本行和上一行均为DataControlRowType.DataRow 
                                if (gv.Rows[i].RowType == DataControlRowType.DataRow && gv.Rows[i - 1].RowType == DataControlRowType.DataRow) 
                                { 
                                        // 遍历指定的列索引 
                                        for (int j = 0; j < columnIndices.Length; j++) 
                                        { 
                                                // 列索引超出范围则不处理 
                                                if (columnIndices[j] < 0 || columnIndices[j] > gv.Columns.Count - 1) continue; 
 
                                                // 相邻单元格的内容相同 
                                                if (gv.Rows[i].Cells[columnIndices[j]].Text == gv.Rows[i - 1].Cells[columnIndices[j]].Text) 
                                                { 
                                                        if (aryBln[j]) 
                                                                aryInt[j] = i - 1; 
 
                                                        if (gv.Rows[aryInt[j]].Cells[columnIndices[j]].RowSpan == 0) 
                                                                gv.Rows[aryInt[j]].Cells[columnIndices[j]].RowSpan = 1; 
 
                                                        gv.Rows[aryInt[j]].Cells[columnIndices[j]].RowSpan++; 
                                                        gv.Rows[i].Cells[columnIndices[j]].Visible = false; 
 
                                                        aryBln[j] = false; 
                                                } 
                                                else 
                                                { 
                                                        aryBln[j] = true; 
                                                } 
                                        } 
                                } 
                        } 
                } 
        } 
}

using System; 
using System.Collections.Generic; 
using System.Text; 
 
using System.ComponentModel; 
 
namespace YYControls 
{ 
        /// <summary> 
        /// SmartGridView类的属性部分 
        /// </summary> 
        public partial class SmartGridView 
        { 
                private string _mergeCells; 
                /// <summary> 
                /// 需要合并单元格的列的索引（用逗号“,”分隔） 
                /// </summary> 
                [ 
                Browsable(true), 
                Description("需要合并单元格的列的索引（用逗号“,”分隔）"),    
                Category("扩展") 
                ] 
                public virtual string MergeCells 
                { 
                        get { return _mergeCells; } 
                        set { _mergeCells = value; } 
                } 
        } 
}

using System; 
using System.Collections.Generic; 
using System.Text; 
 
using System.Web.UI.WebControls; 
 
namespace YYControls.SmartGridViewFunction 
{ 
        /// <summary> 
        /// 扩展功能：合并指定列的相邻且内容相同的单元格 
        /// </summary> 
        public class MergeCellsFunction : ExtendFunction 
        { 
                /// <summary> 
                /// 构造函数 
                /// </summary> 
                public MergeCellsFunction() 
                        : base() 
                { 
 
                } 
 
                /// <summary> 
                /// 构造函数 
                /// </summary> 
                /// <param name="sgv">SmartGridView对象</param> 
                public MergeCellsFunction(SmartGridView sgv) 
                        : base(sgv) 
                { 
         
                } 
 
                /// <summary> 
                /// 扩展功能的实现 
                /// </summary> 
                protected override void Execute() 
                { 
                        this._sgv.DataBound += new EventHandler(_sgv_DataBound); 
                } 
 
                /// <summary> 
                /// SmartGridView的DataBound事件 
                /// </summary> 
                /// <param name="sender"></param> 
                /// <param name="e"></param> 
                void _sgv_DataBound(object sender, EventArgs e) 
                { 
                        string[] ary = this._sgv.MergeCells.Split(','); 
                        int[] columnIndices = new int[ary.Length]; 
 
                        // 将字符串数组转为整型数组 
                        for (int i = 0; i < columnIndices.Length; i++) 
                        { 
                                int j; 
                                if (!Int32.TryParse(ary[i], out j)) 
                                { 
                                        // 转整型失败则赋值为-1，“合并指定列的相邻且内容相同的单元格”则不会处理 
                                        j = -1; 
                                } 
 
                                columnIndices[i] = j; 
                        } 
 
                        YYControls.Helper.SmartGridView.MergeCells(this._sgv, columnIndices); 
                } 
        } 
}