解决某些.net不方便解决的问题，解决方法就是 DHTML

using System;
using System.Collections;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace PPA.Runtime.Util
{
 /// <summary>
 /// WebUtil Web功能。
 /// </summary>
 public class WebUtil
 {
  public WebUtil()
  {
   //
   // TODO: 在此处添加构造函数逻辑
   //
  }
  public static void InsertTableColumn(Page page, string tabObjId, int columnIdx, string innerHTML, int width)
  {
   StringBuilder script = new StringBuilder();
   script.Append("<script language=javascript> \n<!--\n");
   script.Append("function InsertColumn(tab,idx,tdContent,tdWidth) \n");
   script.Append("{ \n");
   script.Append("var td = tab.rows[0].insertCell(idx); \n");
   script.Append("td.rowSpan = tab.rows.length; \n");
   script.Append("td.innerHTML = tdContent; \n");
   script.Append("td.width = tdWidth; \n");
   script.Append("} \n-->\n</script>\n");
   page.RegisterStartupScript("InsertColumnScript",script.ToString());

   StringBuilder call = new StringBuilder();
   call.Append("<script language=javascript> \n<!--\n");
   call.AppendFormat("InsertColumn(document.all[\"{0}\"],{1},\"{2}\",{3});",tabObjId,columnIdx,innerHTML,width);
   call.Append(" \n-->\n</script>\n");
   page.RegisterStartupScript("CallInsertColumnScript",call.ToString());
           
  }
  public static void ScrollIntoObject(Page page,string objId)
  {
   StringBuilder script = new StringBuilder();
   script.Append( "<script language=\"javascript\">\n");
　   script.Append( "function ViewObj(objName)\n");
　   script.Append( "{\n");
　   script.Append( "var obj = document.all.item(objName);\n");
　   script.Append( "if (obj != null)\n");
　   script.Append( "{\n");
　   script.Append( "\tobj.scrollIntoView();\n");
   script.Append( "\twindow.scroll(0,window.screen.availHeight/3);\n");
　   script.Append( "\tobj.focus();\n");
　   script.Append( "}\n");
　   script.Append( "}\n");
   script.Append( "function AutoScrollIntoView()"); 
　   script.Append( "{\n");
　   script.Append( string.Format("setTimeout(\"ViewObj('{0}')\",1000);\n", objId));
　   script.Append( "}\n");
　   script.Append( "window.onload = AutoScrollIntoView;\n");
　   script.Append( "</script>\n");    
   page.RegisterStartupScript("AutoScrollIntoView",script.ToString());   
  }
  /// <summary>
  /// 合并指定数据表的某些列，条件是相邻上下列的内容一致
  /// </summary>
  /// <param name="grid">数据表</param>
  /// <param name="startRow">开始计划合并的行</param>
  /// <param name="cellIdx">第几列要计划合并</param>
  public static void MergeDataGridCells(DataGrid grid,int startRow,int cellIdx)
  {
   StringBuilder script = new StringBuilder();
   script.Append("<SCRIPT LANGUAGE=\"JScript\">\n");
   script.Append("function mergeCells(tab,startRow,cellIdx) {\n");
   script.Append(" var lastCell = null;\n");
   script.Append(" for (var i=startRow; i < tab.rows.length; i++) {\n");
   script.Append("  var row = tab.rows(i);\n");
   script.Append("  var cell = row.cells(cellIdx);\n");     
   script.Append("  if(lastCell != null)\n");
   script.Append("  {   \n");
   script.Append("   if(lastCell.innerHTML == cell.innerHTML)\n");
   script.Append("   {\n");
   script.Append("    row.deleteCell(cellIdx);\n");
   script.Append("    lastCell.rowSpan ++;\n");
   script.Append("   }\n");
   script.Append("   else\n");
   script.Append("    lastCell = cell;  \n");
   script.Append("  }\n");
   script.Append("  else\n");
   script.Append("   lastCell = cell;\n");
   script.Append(" }\n");
   script.Append("}\n");
   script.Append("</SCRIPT>\n");   
   grid.Page.RegisterStartupScript("MergeTableCellScript",script.ToString());
   //DO IT!!!
   StringBuilder doScript = new StringBuilder();   
   doScript.AppendFormat("<script language=javascript><!--\n mergeCells({0},{1},{2});\n-->\n</script>",grid.ID,startRow,cellIdx);
   grid.Page.RegisterStartupScript("DoMerge" + grid.ID + "cells",doScript.ToString());
  }
  
  /// <summary>
  /// 取得选中的编号列表
  /// </summary>
  /// <param name="dataGrid">数据表</param>
  /// <param name="checkBoxList">checkbox的id</param>
  /// <param name="labelId">存放编号的label的id</param>
  /// <returns></returns>
  public static IList GetSelectedIdList(DataGrid dataGrid,string checkBoxList,string labelId)
  {
   IList result = new ArrayList();
   for (int i = 0; i < dataGrid.Items.Count; i++)
   {
    CheckBox chkBox = (CheckBox) dataGrid.Items[i].FindControl(checkBoxList);
    if (chkBox.Checked)
    {
     Label LabelId = (Label) dataGrid.Items[i].FindControl(labelId);
     result.Add(Convert.ToInt32(LabelId.Text));
    }
   }
   return result;
  }
 }
}