asp. net operation xml add delete and change sample share

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")); 
} 
// Add a node  
private void AddElement() 
{ 
    LoadXml(); 
    XmlNode xmldocSelect=xmlDoc.SelectSingleNode("user"); 
    XmlElement el=xmlDoc.CreateElement("person");     // add person node  
    el.SetAttribute("name"," Wind and cloud ");     // add person Properties of nodes "name" 
    el.SetAttribute("sex"," female ");     // add person Properties of nodes  "sex" 
    el.SetAttribute("age","25");     // add person Properties of nodes  "age" 
    XmlElement xesub1=xmlDoc.CreateElement("pass");     // add person A node within a node  
    xesub1.InnerText="123";    // Set the text node  
    el.AppendChild(xesub1); 
    XmlElement xesub2=xmlDoc.CreateElement("Address"); 
    xesub2.InnerText=" kunming ";    // Set the text node  
    el.AppendChild(xesub2); 
    xmldocSelect.AppendChild(el); 
    xmlDoc.Save(Server.MapPath("user.xml")); 
} 
// Modify the node  
private void UpdateElement() 
{ 
    LoadXml(); 
    XmlNodeList nodeList=xmlDoc.SelectSingleNode("user").ChildNodes;    // To obtain bookstore All the children of a node  
    foreach(XmlNode xn in nodeList)    // Iterate over all the child nodes  
    { 
        XmlElement xe=(XmlElement)xn;    // Converts the child node type to XmlElement type  
        if(xe.GetAttribute("name")==" Wind and cloud ")     // if name Attribute value is "Fengyun"  
        { 
            xe.SetAttribute("name"," The invention "); // If there are children down there  
            XmlNodeList nls=xe.ChildNodes;// Continue to get xe All of the child nodes  
            foreach(XmlNode xn1 in nls)// traverse  
            { 
                XmlElement xe2=(XmlElement)xn1;// Conversion type  
                if(xe2.Name=="pass")// If you find  
                { 
                    xe2.InnerText="66666";// The modified  
                    break; 
                } 
            } 
            break; 
        } 
    } 
    xmlDoc.Save(Server.MapPath("user.xml"));// save  
} 
// Delete a node  
private void deleteNode() 
{ 
    LoadXml(); 
    XmlNodeList xnl=xmlDoc.SelectSingleNode("user").ChildNodes; 
    foreach(XmlNode xn in xnl) 
    { 
        XmlElement xe=(XmlElement)xn; 
        if(xe.GetAttribute("name")==" The invention ") 
        { 
            //xe.RemoveAttribute("name");// delete name attribute  
            xe.RemoveAll();// Deletes all of the contents of the node  
            break; 
        } 
    } 
    xmlDoc.Save(Server.MapPath("user.xml"));// save  
} 
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"));// Display property values  
        // Console.WriteLine(xe.GetAttribute("sex")); 
        // // XmlNodeList xnf1=xe.ChildNodes; 
        // foreach(XmlNode xn2 in xnf1) // 
        { 
            // Console.WriteLine(xn2.InnerText); 
            // Display child node dot text  
    // } 
    } 
} 

Xml style:

<?xml version="1.0" encoding="gb2312"?> 
<user> 
    <person> </person> 
    <person name=" The wind, " sex=" male " age="25"> 
        <pass>123</pass> 
        <Address> daming </Address> 
    </person> 
    <person name=" Wind and cloud " sex=" female " age="25"> 
        <pass>123</pass> 
        <Address> kunming </Address> 
    </person> 
</user>