xml学习

<?xml version="1.0" encoding="utf-8" ?>
<character>
  <select>
    <id>0</id>
    <name>1</name>
    <where></where>
  </select>
  <from>
    <id>1</id>
    <name>name</name>
  </from>
  <where>
    <faild></faild>
    <bb></bb>
    <aa></aa>
  </where>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Xml;

namespace WinFormTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            createXml();
        }
        private void createXml()
        {
            XmlWriterSettings settings = new XmlWriterSettings();
            settings.Indent = true;
            settings.IndentChars = ("    ");
            using (XmlWriter writer = XmlWriter.Create("c:/books.xml", settings))
            {
                // Write XML data.
                // writer.WriteStartElement("book");
                writer.WriteComment("test");
                writer.WriteStartElement("book");
                writer.WriteElementString("title", "ti");
                writer.WriteElementString("price", "19.95");
                writer.WriteEndElement();
                writer.Flush();
            }


        
        }
        //public DataTable Bind(string fullFolderPath)//创建数据表读取文件夹内容
        //{
        //    //以下是动态创建数据表的方法
        //    DataTable dt = new DataTable();
        //    DataRow dr;
        //    //首先创建数据表结构
        //    dt.Columns.Add(new DataColumn("type", System.Type.GetType("System.String")));//类型
        //    dt.Columns.Add(new DataColumn("name", System.Type.GetType("System.String")));//名称
        //    dt.Columns.Add(new DataColumn("action", System.Type.GetType("System.String")));//操作
        //    dt.Columns.Add(new DataColumn("owner", System.Type.GetType("System.String")));//创建人
        //    //为每一行填充数据
        //    foreach (string d in Directory.GetFileSystemEntries(fullFolderPath))
        //    {
        //        dr = dt.NewRow();//建新行
        //        string[] parts = d.Split(new char[] { '/' });
        //        string txt = parts[parts.Length - 1];//取最后一部分的字符串，它将可能是文件名或文件夹
        //        dr[1] = txt;//名称name
        //        if (File.Exists(d))//如果是文件
        //        {
        //            dr[0] = "文件";//类型type 
        //            int pos = currFullPath.IndexOf("NetHard");
        //            string relaUrl = currFullPath.Substring(pos);
        //            string
        //            url = "http://10.80.50.1/SharedSpace/" + relaUrl + "/" + txt;//10.80.50.1为作者服务器地址，你应该将它修改为你所在服务器地址
        //            dr[2] = "<a href=" + url + " target=_blank" + ">下载</a>";
        //        }
        //        else if (Directory.Exists(d))
        //        {//如果是文件夹
        //            dr[0] = "文件夹";//type类型
        //            string passWord = GetFolderPassword(d);//取得文件夹密码信息
        //            int type = GetFolderLimitType(d);
        //            if ((password != "no") && (type != 1))
        //                dr[2] = "<a href=PasswordValidate.aspx?path=" + d + ">密封</a>";//操作action
        //            else
        //                dr[2] = "<a href=Default.aspx?path=" + d + ">进入</a>";//操作action
        //            dr[3] = GetFolderOwner(d);//取文件夹创建者名
        //        }
        //        else
        //            //Response.Write("<script>alert('无对象可绑定!')</script>");
        //        dt.Rows.Add(dr);//添加行
        //        return dt;//返回数据表
        //    }
        //}

        public void CreateXmlOrAddFrag(string xmlFullPath, string folderFullPath, string owner, string password, int type)
        {
            XmlDocument xmlDoc = new XmlDocument();
            string xml = "";
            string xmlNode = "<character>";
            xmlNode += "<fullPath>";
            xmlNode += folderFullPath;
            xmlNode += "</fullPath>";
            xmlNode += "<owner>";
            xmlNode += owner;
            xmlNode += "</owner>";
            xmlNode += "<password>";
            xmlNode += password;
            xmlNode += "</password>";
            xmlNode += "<type>";
            xmlNode += type;
            xmlNode += "</type>";
            xmlNode += "</character>";
            if (!File.Exists(xmlFullPath))
            {//不存在则创建xml存储文件
                xml = "<?xml version='1.0' encoding='gb2312'?>";
                xml += "<folder>";
                xml += xmlNode;
                xml += "</folder>";
                xmlDoc.LoadXml(xml);
                xmlDoc.Save(xmlFullPath);//存储文件
            }
            else
            {//存在xml存储文件则添加新的文档片段
                xmlDoc.Load(xmlFullPath);
                XmlDocumentFragment docFrag = xmlDoc.CreateDocumentFragment();//文档片元素节点
                docFrag.InnerXml = xmlNode;
                XmlNode currNode = xmlDoc.DocumentElement;//获取文档根节淀
                currNode.InsertBefore(docFrag, currNode.FirstChild);//插入文档段
                xmlDoc.Save(xmlFullPath);//存储改变
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            StringBuilder sb = new StringBuilder();
            using (XmlReader reader = XmlReader.Create(@"c:ooks.xml"))
            {

                while (reader.Read())
                {
                    if (reader.IsStartElement())
                    {
                        if (reader.IsEmptyElement)
                            Console.WriteLine("<{0}/>", reader.Name);
                        else
                        {
                            Console.Write("<{0}> ", reader.Name);
                            reader.Read(); // Read the start tag.
                            if (reader.IsStartElement())  // Handle nested elements.
                                Console.Write(" <{0}>", reader.Name);
                            Console.WriteLine(reader.ReadString());  //Read the text content of the element.
                        }
                    }
                } 



            }
            textBox1.Text = sb.ToString();
        }


    }
}