asp.net ¶ÔxmlÎļþµÄ¶Áд,Ìí¼Ó,ÐÞ¸Ä,ɾ³ý²Ù×÷

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Xml;
private XmlDocument xmlDoc;
//load xml file
private void LoadXml()
{
xmlDoc=new XmlDocument();
xmlDoc.Load(Server.MapPath("User.xml"));
}
//Ìí¼Ó½Úµã
private void AddElement()
{
LoadXml();
XmlNode xmldocSelect=xmlDoc.SelectSingleNode("user");
XmlElement el=xmlDoc.CreateElement("person"); //Ìí¼Óperson½Úµã
el.SetAttribute("name","·çÔÆ"); //Ìí¼Óperson½ÚµãµÄÊôÐÔ"name"
el.SetAttribute("sex","Å®"); //Ìí¼Óperson½ÚµãµÄÊôÐÔ "sex"
el.SetAttribute("age","25"); //Ìí¼Óperson½ÚµãµÄÊôÐÔ "age"
XmlElement xesub1=xmlDoc.CreateElement("pass"); //Ìí¼Óperson½ÚµãµÄÀïµÄ½Úµã
xesub1.InnerText="123";//ÉèÖÃÎı¾½Úµã
el.AppendChild(xesub1);
XmlElement xesub2=xmlDoc.CreateElement("Address");
xesub2.InnerText="À¥Ã÷";//ÉèÖÃÎı¾½Úµã
el.AppendChild(xesub2);
xmldocSelect.AppendChild(el);
xmlDoc.Save(Server.MapPath("user.xml"));
}
//Ð޸Ľڵã
private void UpdateElement()
{
LoadXml();
XmlNodeList nodeList=xmlDoc.SelectSingleNode("user").ChildNodes;//»ñÈ¡bookstore½ÚµãµÄËùÓÐ×Ó½Úµã
foreach(XmlNode xn in nodeList)//±éÀúËùÓÐ×Ó½Úµã
{
XmlElement xe=(XmlElement)xn;//½«×Ó½ÚµãÀàÐÍת»»ÎªXmlElementÀàÐÍ
if(xe.GetAttribute("name")=="·çÔÆ")//Èç¹ûnameÊôÐÔֵΪ“·çÔÆ”
{
xe.SetAttribute("name","·¢Ã÷");
//Èç¹ûÏÂÃæÓÐ×Ó½ÚµãÔÚÏÂ×ß
XmlNodeList nls=xe.ChildNodes;//¼ÌÐø»ñÈ¡xe×Ó½ÚµãµÄËùÓÐ×Ó½Úµã
foreach(XmlNode xn1 in nls)//±éÀú
{
XmlElement xe2=(XmlElement)xn1;//ת»»ÀàÐÍ
if(xe2.Name=="pass")//Èç¹ûÕÒµ½
{
xe2.InnerText="66666";//ÔòÐÞ¸Ä
break;
}
}
break;
}
}
xmlDoc.Save(Server.MapPath("user.xml"));//±£´æ
}
//ɾ³ö½Úµã
private void deleteNode()
{
LoadXml();
XmlNodeList xnl=xmlDoc.SelectSingleNode("user").ChildNodes;
foreach(XmlNode