ASP.net中 动态加载控件后控件定位的问题（收藏）

这个问题困扰了我很久了，今天在csdn上见到了高人的代码。收藏！

1、在aspx页面给body添加id属性：<body id="thebody" MS_POSITIONING="GridLayout">
2、后台代码（.cs文件）中引用：using System.Text;
3、添加方法：
#region "防止页面滚动"
private void RetainScrollPosition()
{
 StringBuilder saveScrollPosition = new StringBuilder ();
 StringBuilder setScrollPosition = new StringBuilder ();

 RegisterHiddenField("__SCROLLPOS", "0");

 saveScrollPosition.Append("<script language='javascript'>");
 saveScrollPosition.Append("function saveScrollPosition() {");
 saveScrollPosition.Append("    document.forms[0].__SCROLLPOS.value = thebody.scrollTop;");
 saveScrollPosition.Append("}");
 saveScrollPosition.Append("thebody.onscroll=saveScrollPosition;");
 saveScrollPosition.Append("</script>");

 RegisterStartupScript("saveScroll", saveScrollPosition.ToString());

 if (Page.IsPostBack)
 {
     setScrollPosition.Append("<script language='javascript'>");
  setScrollPosition.Append("function setScrollPosition() {");
  setScrollPosition.Append("    thebody.scrollTop = " + Request["__SCROLLPOS"] + ";");
  setScrollPosition.Append("}");
  setScrollPosition.Append("thebody.onload=setScrollPosition;");
  setScrollPosition.Append("</script>");

  RegisterStartupScript("setScroll", setScrollPosition.ToString());
   }
  }
#endregion

4、在page_load中调用此方法：
    this.RetainScrollPosition();

Form：http://community.csdn.net/Expert/topic/2779/2779374.xml?temp=.850094