asp.net 操作xml

asp.net 对xml文件的读写,添加,修改,删除操作
下面有代码调试正确

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"));
        }


         // 添加节点
         private   void  AddElement()
         {
            
            LoadXml();

            XmlNode xmldocSelect=xmlDoc.SelectSingleNode("user");
            
            XmlElement el=xmlDoc.CreateElement("person"); //添加person节点
            el.SetAttribute("name","风云"); //添加person节点的属性"name"
            el.SetAttribute("sex","女");   //添加person节点的属性 "sex"
            el.SetAttribute("age","25");   //添加person节点的属性 "age"
            
             XmlElement xesub1=xmlDoc.CreateElement("pass"); //添加person节点的里的节点
             xesub1.InnerText="123";//设置文本节点
             el.AppendChild(xesub1);
             XmlElement xesub2=xmlDoc.CreateElement("Address");
             xesub2.InnerText="昆明";//设置文本节点
             el.AppendChild(xesub2);

            xmldocSelect.AppendChild(el);
            xmlDoc.Save(Server.MapPath("user.xml"));


        }


        

         // 修改节点
         private   void  UpdateElement()
         {
            LoadXml();
            XmlNodeList nodeList=xmlDoc.SelectSingleNode("user").ChildNodes;//获取bookstore节点的所有子节点
            foreach(XmlNode xn in nodeList)//遍历所有子节点
            {
                XmlElement xe=(XmlElement)xn;//将子节点类型转换为XmlElement类型
                if(xe.GetAttribute("name")=="风云")//如果name属性值为“风云”
                {
                    xe.SetAttribute("name","发明");

                    
                    //如果下面有子节点在下走
                     XmlNodeList nls=xe.ChildNodes;//继续获取xe子节点的所有子节点
                    foreach(XmlNode xn1 in nls)//遍历
                    {
                       XmlElement xe2=(XmlElement)xn1;//转换类型
                        if(xe2.Name=="pass")//如果找到
                        {
                            xe2.InnerText="66666";//则修改
                            break;

                        }
                    }

                    break;
                }
            }
           xmlDoc.Save(Server.MapPath("user.xml"));//保存
        }


         // 删出节点
         private   void  deleteNode()
         {
            
            LoadXml();
            XmlNodeList xnl=xmlDoc.SelectSingleNode("user").ChildNodes;
 
            foreach(XmlNode xn in xnl)
            {
                XmlElement xe=(XmlElement)xn;
                
                if(xe.GetAttribute("name")=="发明")
                {
                    //xe.RemoveAttribute("name");//删除name属性
                   // xe.RemoveAll();//删除该节点的全部内容
                    xe.ParentNode.RemoveChild(xe);
                    
                    break;
                }
                
            }
            xmlDoc.Save(Server.MapPath("user.xml"));//保存
        }

         private   void  showIt()
         {
            LoadXml();
            XmlNode xn=xmlDoc.SelectSingleNode("user");
 
            XmlNodeList xnl=xn.ChildNodes;
   
            foreach(XmlNode xnf in xnl)
            {
                XmlElement xe=(XmlElement)xnf;
//                Console.WriteLine(xe.GetAttribute("name"));//显示属性值
//                Console.WriteLine(xe.GetAttribute("sex"));
// 
//                XmlNodeList xnf1=xe.ChildNodes;
//                foreach(XmlNode xn2 in xnf1)
//                {
//                    Console.WriteLine(xn2.InnerText);//显示子节点点文本
//                }

            }

        }
    

Xml的样式:

<? xml version="1.0" encoding="gb2312" ?>
< user >
   < person >
   </ person >
   < person  name ="风拉"  sex ="男"  age ="25" >
     < pass > 123 </ pass >
     < Address > 大明 </ Address >
   </ person >
   < person  name ="风云"  sex ="女"  age ="25" >
     < pass > 123 </ pass >
     < Address > 昆明 </ Address >
   </ person >
</ user >

转载于:https://www.cnblogs.com/cfam/archive/2006/11/17/563441.html