ASP.net Xml: ASP.net操作Xml

<?xml version="1.0" encoding="utf-8"?>
<vote>
  <item belong="三国演义">
    <id>1</id>
    <name>晓梅</name>
    <number>60</number>
  </item>
  <item belong="西游记">
    <id>2</id>
    <name>小骆</name>
    <number>34</number>
  </item>
  <item belong="天涯">
    <id>3</id>
    <name>莫离</name>
    <number>110</number>
  </item>
</vote>

using System;

/// <summary>
///Vote 的摘要说明
/// </summary>
public class VoteInfo
{
    // 1, Attributes
    /// <summary>
    ///  图书名称
    /// </summary>
    string _belong;
    /// <summary>
    /// 编号
    /// </summary>
    string _id;
    /// <summary>
    /// 作者
    /// </summary>
    string _name;
    /// <summary>
    /// 书本数量
    /// </summary>
    string _number;

    // 2, Struct

    public VoteInfo(string belong, string id,string name, string number)
    {
        this._belong = belong;
        this._id = id;
        this._name = name;
        this._number = number;
    }

    public VoteInfo()
    {
    }

    //封装字段


    public string Belong
    {
        get { return _belong; }
        set { _belong = value; }
    }

    public string Id
    {
        get { return _id; }
        set { _id = value; }
    }

    public string Name
    {
        get { return _name; }
        set { _name = value; }
    }

    public string Number
    {
        get { return _number; }
        set { _number = value; }
    }
}

using System;

using System.Xml;
public partial class DemoXML : System.Web.UI.Page
{
   
    /// <summary>
    /// ylb:1, 遍历xml文档
    /// </summary>
    private void BianLi()
    { 
    
        //提取xml文档
        XmlDocument xd = new XmlDocument();
        xd.Load(Server.MapPath("Vote.xml"));

        //获取根节点
        XmlNode root = xd.DocumentElement;

        //获取节点列表
        XmlNodeList items = root.ChildNodes;

        //遍历item项
        Response.Write("<pre>");
        foreach (XmlNode item in items)
        { 
            //输出属性
            Response.Write(item.Attributes["belong"].Name+"="+item.Attributes["belong"].InnerText+"\t");
            //输出子节点
            foreach (XmlNode p in item)
            {
                Response.Write(p.Name+"="+p.InnerText+"\t");
            }
            Response.Write("\n");
        }
        Response.Write("</pre>");


    }

    /// <summary>
    /// ylb:2, 添加
    /// </summary>
    /// <param name="item"></param>
    private void Add(VoteInfo item)
    { 
        //提取xml文档
        XmlDocument xd = new XmlDocument();
        xd.Load(Server.MapPath("Vote.xml"));

        //获取根节点
        XmlNode root = xd.DocumentElement;

        //创建元素
        XmlElement newItem = xd.CreateElement("item");

        XmlElement newID = xd.CreateElement("id");
        XmlElement newName = xd.CreateElement("name");
        XmlElement newNumber = xd.CreateElement("number");

        //配参
        newItem.SetAttribute("belong", item.Belong);    //设置属性

        newID.InnerText = item.Id;  //设置内容
        newName.InnerText = item.Name;
        newNumber.InnerText = item.Number;

        //装配，实现其组织结构
        root.AppendChild(newItem);

        newItem.AppendChild(newID);
        newItem.AppendChild(newName);
        newItem.AppendChild(newNumber);

        //保存xml文档
        xd.Save(Server.MapPath("Vote.xml"));
        
    }

    /// <summary>
    /// ylb:3, 修改一项
    /// </summary>
    /// <param name="vote"></param>
    private void Update(VoteInfo vote)
    {
        //提取xml文档
        XmlDocument xd = new XmlDocument();
        xd.Load(Server.MapPath("Vote.xml"));

        //获取根节点
        XmlNode root = xd.DocumentElement;

        //获取节点类表
        XmlNodeList items = root.ChildNodes;

        //循环节点
        foreach (XmlNode item in items)
        {
            //再循环节点
            foreach (XmlNode p in item)
            {
                if (p.Name == "id" && p.InnerText == vote.Id)
                {
                    //则修改这一项

                    //重设belong的值
                    item.Attributes["belong"].InnerText = vote.Belong;
                    //((XmlElement)item).SetAttribute("belong", vote.Belong);

                    //给该节点（id）下的节点赋值
                    p.NextSibling.InnerText = vote.Name;
                    p.NextSibling.NextSibling.InnerText = vote.Number;
                }
            }
        }
        //保存xml文档
        xd.Save(Server.MapPath("Vote.xml"));
    }

    /// <summary>
    /// ylb:4, 删除一项
    /// </summary>
    /// <param name="id"></param>
    private void Delete(string id)
    { 
        //提取xml文档
        XmlDocument xd = new XmlDocument();
        xd.Load(Server.MapPath("vote.xml"));

        //获取根节点
        XmlNode root = xd.DocumentElement;

        //获取节点列表
        XmlNodeList items = root.ChildNodes;

        //循环节点
        foreach (XmlNode item in items)
        {
            foreach (XmlNode p in item)
            {
                if (p.Name == "id" && p.InnerText == id)
                { 
                    //移除该项
                    root.RemoveChild(item);                    
                }
            }
        }
        //保存xml文档
        xd.Save(Server.MapPath("Vote.xml"));
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        //调用展示
        //ylb: 2,
        VoteInfo item = new VoteInfo("袁博自传", "4", "ylb", "100");
        //Add(item);

        //ylb: 3, 根据id=3，修改 belong="天涯" name="莫离",number=110
        VoteInfo item2 = new VoteInfo("天涯", "3", "莫离", "110");
        //Update(item2);

        //ylb: 4, 删除id=4的项
        Delete("3");

        //ylb: 1, 遍历Xml文档
        //BianLi();
    }
}