C#  XML(1) 建立/修改/查詢

---

 

using System;

using
System.Collections.Generic;

using
System.Linq;

using
System.Text;

using System.Xml;

 

namespace
CS_Console_XML

{

    class Program

    {

        static void Pause()

        {

            Console.Write(“Press any key to continue . . . “);

            Console.ReadKey(true);

        }

        static void Main(string[]
args)

        {

            //單a純ÂA建O立DsXML檔E案¡Ñ和M寫g入J

            /*

            //這o是O輸e出DX結g2果G：G

            <?xml version=”1.0″
encoding=”utf-8″?>

            <AllUsers>

             
<User RFID=”123456789″>

                
<USER_IP>192.168.0.1</USER_IP>

                
<Description>
這o是O描¦y述z</Description>

             
</User>

            </AllUsers>

            */

            XmlTextWriter
XTW = new XmlTextWriter(“user.xml”, Encoding.UTF8);

            XTW.WriteStartDocument();

 

            XTW.WriteStartElement(“AllUsers”);

            XTW.WriteStartElement(“User”);

            XTW.WriteAttributeString(“RFID”, “123456789”);

 

            XTW.WriteElementString(“USER_IP”, “192.168.0.1”);

            XTW.WriteElementString(“Description”, “這o是O描¦y述z”);

            XTW.WriteEndElement();

            XTW.WriteEndElement();

 

            XTW.Flush();     //寫g這o行a才~會P|寫g入J檔E案¡Ñ

            XTW.Close();

           

            //單a純ÂA讀a取Lu

            XmlDocument
xd = new XmlDocument();

            xd.Load(“user.xml”);

            XmlNode
root = xd.SelectSingleNode(“//User”);

            foreach
(XmlElement elm in
root.ChildNodes)

            {

                Console.WriteLine(elm.Name.Trim()
+
“:” + elm.InnerText.Trim());//Node名W稱U:Node值E

            }

 

            //修¡Ñ改±i

            XmlDocument
xmlDoc = new XmlDocument();

            xmlDoc.Load(“user.xml”);

            XmlNode
root1 = xmlDoc.SelectSingleNode(“//User”);

            foreach (XmlElement elm in
root1.ChildNodes)

            {

                elm.InnerText = “123”;

            }

            //xmlDoc.Save(“user.xml”);//修¡Ñ改±i

            xmlDoc.Save(“user1.xml”);//另Dt存s。C

            Pause();

        }

 

    }

}