在DataGrid中合并单元格行

最近在做项目的时候经常遇到要合并单元格的情况，发现这个东西.net中并没有现成的方法，研究了一下，总结了两种方法。
这个主要都是行合并的，有以下两种情况
1、多行合并为一行，其中将某个或某几个单元格的内容合并起来
     原始样式：
            column1     column2
                1                    a
                1                    b
                1                    c
                1                    d
                2                    q
                2                    w
                2                    e
      需要效果：
            column1        column2
                1                    a/b/c/d
                2                    q/w/e
      代        码： 
                 

      private   void  DataGrid_CaseTeamList_Bind() 
         { 
            取得数据部分代码省略 
            dsSpeTeam = o.GetData(strSQL).Tables[0].DefaultView; 
            DataSet dsSpeL = o.GetData(strSQLSpe); 
            DataGrid_CaseTeamList.ItemCreated +=new DataGridItemEventHandler(DataGrid_CaseTeamList_ItemCreated); 
            DataGrid_CaseTeamList.DataSource = dsSpeL.Tables[0].DefaultView; 
            DataGrid_CaseTeamList.DataBind(); 
        }  
 
         private   void  DataGrid_CaseTeamList_ItemCreated( object  sender, DataGridItemEventArgs e) 
         { 
            DataGridItem item = e.Item; 
            if (item.ItemType == ListItemType.Item || item.ItemType == ListItemType.AlternatingItem) 
            { 
                DataRowView row = (DataRowView)e.Item.DataItem; 
                //set the filter condition 
                string sSpecialist = row["column1"].ToString(); 
                dsSpeTeam.RowFilter = string.Format(" column1 = '{0}'", sSpecialist.Replace("'", "''")); 
                 
                 //----------------------------------------------------------
                // 若要将checkbox 合并放入,可使用下面代码 代替以下部分
                 //    CheckBoxList boxList = new CheckBoxList();
                //    boxList.RepeatColumns  = 2;
                //    boxList.RepeatDirection = RepeatDirection.Horizontal;
                //    boxList.DataSource = dsSpeTeam;
                //    boxList.DataTextField = "Team";
                //    boxList.DataValueField = "Team";
                //    PlaceHolder holder = (PlaceHolder) e.Item.FindControl("TeamArray");
                //    holder.Controls.Add(boxList);
                //----------------------------------------------------------
                 DataRowView row1 = null; 
                IEnumerator Enum = dsSpeTeam.GetEnumerator(); 
                string strTeam= ""; 
                while (Enum.MoveNext()) 
                { 
                    row1 = (DataRowView) Enum.Current; 
                    strTeam = strTeam + row1["column2"] + "/"; 
                } 
                Label lbl = new Label(); 
                if (strTeam.Length > 0) 
                { 
                    lbl.Text = strTeam.Substring(0,strTeam.Length-1); 
                } 
                else 
                { 
                    lbl.Text = " "; 
                } 
                lbl.Style.Add("padding-left","5px"); 
                //在datagrid中,合并目标列放一个PlaceHolder控件 
                //------------------------------------------------------------
                PlaceHolder holder = (PlaceHolder) e.Item.FindControl("column2Value"); 
                holder.Controls.Add(lbl); 
            } 
        }  

2、将Datagrid中的某些相同的单元格合并
        原始样式：    
                Column1            Column2
                    1                                a
                    1                                b
                    1                                c
                     2                                x
                     2                                y
                      2                               z
        需要效果：
                Column1            Column2
                                                     a
                       1                            b
                                                     c
_____________________________
                                                      x
                        2                            y
                                                       z

        代        码：
                

         /**/ /// <summary>
        /// used to merge cells
        /// </summary>
        /// <param name="dg">datagrid will be merged</param>
        /// <param name="GroupColumn">merged column</param>
        /// <param name="compareColumn">basis column</param>
         private   void  spanRow(DataGrid dg, int  GroupColumn, int  compareColumn)
         {
            int i = 0;
            int j = 0;
            int rowSpan;
            string strTemp = "";
 
            for(i=0;i<dg.Items.Count;i++)
            {
                rowSpan = 1;
                strTemp = dg.Items[i].Cells[compareColumn].Text;
                for (j=i+1;j<dg.Items.Count;j++)
                {
                    if (string.Compare(strTemp,dg.Items[j].Cells[compareColumn].Text) == 0)
                    {
                        rowSpan += 1;
                        dg.Items[i].Cells[GroupColumn].RowSpan = rowSpan;
                        dg.Items[j].Cells[GroupColumn].Visible = false;
                    }
                    else
                    {
                        break;
                    }
                }
                i = j -1;
            }
        }

        以上两种方法可合并使用