Example of adding, deleting, and modifying xml operations in asp.net

Copy codeThe Code is as follows:
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 a person Node
El. SetAttribute ("name", ""); // Add the property of the person node "name"
El. SetAttribute ("sex", "female"); // Add the property of the person node "sex"
El. SetAttribute ("age", "25"); // Add the property of the person node "age"
XmlElement xesub1 = xmlDoc. CreateElement ("pass"); // Add a node in the person Node
Xesub1.InnerText = "123"; // set a text node
El. AppendChild (xesub1 );
XmlElement xesub2 = xmlDoc. CreateElement ("Address ");
Xesub2.InnerText = "Kunming"; // set a text node
El. AppendChild (xesub2 );
XmldocSelect. AppendChild (el );
XmlDoc. Save (Server. MapPath ("user. xml "));
}
// Modify a node
Private void UpdateElement ()
{
LoadXml ();
XmlNodeList nodeList = xmlDoc. SelectSingleNode ("user"). ChildNodes; // obtain all the subnodes of the bookstore Node
Foreach (XmlNode xn in nodeList) // traverses all subnodes
{
XmlElement xe = (XmlElement) xn; // converts the subnode type to the XmlElement type
If (xe. GetAttribute ("name") = "") // if the attribute value of name is ""
{
Xe. SetAttribute ("name", "invention"); // if there are subnodes below
XmlNodeList nls = xe. ChildNodes; // continue to obtain all the child nodes of the xe subnode
Foreach (XmlNode xn1 in nls) // traverse
{
XmlElement xe2 = (XmlElement) xn1; // Conversion Type
If (xe2.Name = "pass") // if you find
{
Xe2.InnerText = "66666"; // modify
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") = "invention ")
{
// Xe. RemoveAttribute ("name"); // delete the name attribute
Xe. RemoveAll (); // delete all content 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 the attribute value
// Console. WriteLine (xe. GetAttribute ("sex "));
/// XmlNodeList xnf1 = xe. ChildNodes;
// Foreach (XmlNode xn2 in xnf1 )//
{
// Console. WriteLine (xn2.InnerText );
// Display the child node text
//}
}
}

Xml style:
Copy codeThe Code is as follows:
<? Xml version = "1.0" encoding = "gb2312"?>
<User>
<Person> </person>
<Person name = "fengla" sex = "male" age = "25">
<Passed> 123 </pass>
<Address> Daming </Address>
</Person>
<Person name = "" sex = "" age = "25">
<Passed> 123 </pass>
<Address> Kunming </Address>
</Person>
</User>