c# 创建XML文档，解析XML文档

1.静态函数

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;

namespace httpWebRequest
{
    //CreateXMLList
    //<?xml version="1.0" encoding="utf-8"?>
    //<root>
    //  <parent>
    //    <son>
    //      <name>lady gaga</name>
    //      <age>50</age>
    //    </son>
    //    <son>
    //      <name>swift</name>
    //      <age>42</age>
    //    </son>
    //  </parent>
    //</root>

    //CreateXML
    //<?xml version="1.0" encoding="utf-8"?>
    //<root>
    //  <parent>
    //    <son>
    //      <name>swift</name>
    //    </son>
    //  </parent>
    //</root>

    public class OperateXML
    {
        public OperateXML() { }

        /// <summary>
        /// 创建含有大量子节点的
        /// </summary>
        public static void CreateXMLList(string parentName, string SonName, List<Dictionary<string, string>> XmlNodeInfoList)
        {
            XmlDocument myXml = new XmlDocument();
            //创建声明
            XmlDeclaration xd = myXml.CreateXmlDeclaration("1.0", "utf-8", null);
            myXml.AppendChild(xd);

            //创建根结点
            XmlElement xmlRoot = myXml.CreateElement("root");
            myXml.AppendChild(xmlRoot);

            //创建 parent
            XmlElement parent = myXml.CreateElement(parentName);
            xmlRoot.AppendChild(parent);

            foreach (Dictionary<string, string> xmlNodeInfo in XmlNodeInfoList)
            {
                //在parent下面创建son
                XmlElement son = myXml.CreateElement(SonName);
                parent.AppendChild(son);

                foreach (string key in xmlNodeInfo.Keys)
                {
                    //在son下面创建name
                    XmlElement name = myXml.CreateElement(key);
                    name.InnerText = xmlNodeInfo[key];
                    son.AppendChild(name);
                }
            }

            //保存文档
            myXml.Save("d:\test.xml");
        }

        public static void CreateXML()
        {
            XmlDocument myXml = new XmlDocument();
            //创建声明
            XmlDeclaration xd = myXml.CreateXmlDeclaration("1.0", "utf-8", null);
            myXml.AppendChild(xd);

            //创建根结点
            XmlElement xmlRoot = myXml.CreateElement("root");
            myXml.AppendChild(xmlRoot);

            //创建 parent
            XmlElement parent = myXml.CreateElement("parent");
            xmlRoot.AppendChild(parent);

            //在parent下面创建son
            XmlElement son = myXml.CreateElement("son");
            parent.AppendChild(son);

            //在son下面创建name
            XmlElement name = myXml.CreateElement("name");
            name.InnerText = "swift";
            son.AppendChild(name);

            //保存文档
            myXml.Save("d:\test.xml");
        }

        public static List<string> ParseXML(ref string errStr, string path)
        {
            List<string> nameList = new List<string>();

            XmlDocument myXml = new XmlDocument();
            try
            {
                myXml.Load("d:\test.xml");
            }
            catch (Exception e)
            {
                errStr = string.Format("load xml is failed");
                return null;
            }

            //string path = "root";
            //XmlNode xmlRoot = myXml.SelectSingleNode(path);
            //if (xmlRoot == null)
            //{
            //    errStr = string.Format("do not have this path:{0}", path);
            //    return null;
            //}

            //path = "parent/son";
            XmlNodeList xmlNodeList = myXml.SelectNodes(path);
            if (xmlNodeList == null || xmlNodeList.Count <= 0)
            {
                errStr = string.Format("do not have this path:{0}", path);
                return null;
            }

            foreach (XmlNode xmlNode in xmlNodeList)
            {
                string name = xmlNode.InnerText;
                nameList.Add(name);
            }

            return nameList;
        }
    }
}

　　2.使用

  　　　　private void button1_Click(object sender, EventArgs e)
        {
            Dictionary<string, string> dt = new Dictionary<string, string>() { { "name", "lady gaga" }, { "age", "50" } };
            Dictionary<string, string> dt1 = new Dictionary<string, string>() { { "name", "swift" }, { "age", "42" } };
            List<Dictionary<string, string>> XmlNodeInfoList = new List<Dictionary<string, string>>();
            XmlNodeInfoList.Add(dt);
            XmlNodeInfoList.Add(dt1);
            OperateXML.CreateXMLList("parent", "son", XmlNodeInfoList);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string errStr = string.Empty;
            OperateXML.ParseXML(ref errStr,"root/parent/son");
        }

　　　　　private void button3_Click(object sender, EventArgs e)
        {
           OperateXML.CreateXML();
        }