操作XML完整不错版

 

项目文件下载

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;

namespace WebApplication3
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            showIt();
        }
        private XmlDocument xmlDoc;
        //load xml file
        private void LoadXml()
        {
            xmlDoc = new XmlDocument();
            xmlDoc.Load(Server.MapPath("User.xml"));
        }


        //添加节点
        private void AddElement()
        {

            LoadXml();

            XmlNode xmldocSelect = xmlDoc.SelectSingleNode("user");

            XmlElement el = xmlDoc.CreateElement("person"); //添加person节点
            el.SetAttribute("name", "风云"); //添加person节点的属性"name"
            el.SetAttribute("sex", "女");   //添加person节点的属性 "sex"
            el.SetAttribute("age", "25");   //添加person节点的属性 "age"

            XmlElement xesub1 = xmlDoc.CreateElement("pass"); //添加person节点的里的节点
            xesub1.InnerText = "123";//设置文本节点
            el.AppendChild(xesub1);
            XmlElement xesub2 = xmlDoc.CreateElement("Address");
            xesub2.InnerText = "昆明";//设置文本节点
            el.AppendChild(xesub2);
            XmlElement xesub3 = xmlDoc.CreateElement("id");
            xesub3.InnerText = (xmldocSelect.ChildNodes.Count+1).ToString();//设置文本节点
            el.AppendChild(xesub3);

            xmldocSelect.AppendChild(el);
            xmlDoc.Save(Server.MapPath("user.xml"));


        }




        //修改节点
        private void UpdateElement()
        {
            LoadXml();
            XmlNodeList nodeList = xmlDoc.SelectSingleNode("user").ChildNodes;//获取bookstore节点的所有子节点
            foreach (XmlNode xn in nodeList)//遍历所有子节点
            {
                XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型
                if (xe.GetAttribute("name") == "风云")//如果name属性值为“风云”
                {
                    xe.SetAttribute("name", "发明");


                    //如果下面有子节点在下走
                    XmlNodeList nls = xe.ChildNodes;//继续获取xe子节点的所有子节点
                    foreach (XmlNode xn1 in nls)//遍历
                    {
                        XmlElement xe2 = (XmlElement)xn1;//转换类型
                        if (xe2.Name == "pass")//如果找到
                        {
                            xe2.InnerText = "66666";//则修改
                            break;

                        }
                    }

                    break;
                }
            }
            xmlDoc.Save(Server.MapPath("user.xml"));//保存
        }


        //删出节点
        private void deleteNode()
        {

            LoadXml();
            XmlNodeList xnl = xmlDoc.SelectSingleNode("user").ChildNodes;

            foreach (XmlNode xn in xnl)
            {
                XmlElement xe = (XmlElement)xn;

                if (xe.GetAttribute("name") == "风拉")
                {
                    //xe.RemoveAttribute("name");//删除name属性
                    // xe.RemoveAll();//删除该节点的全部内容
                    xe.ParentNode.RemoveChild(xe);

                    break;
                }

            }
            xmlDoc.Save(Server.MapPath("user.xml"));//保存
        }

        private void showIt()
        {
            LoadXml();
            XmlNode xn = xmlDoc.SelectSingleNode("user");

            XmlNodeList xnl = xn.ChildNodes;

            foreach (XmlNode xnf in xnl)
            {
                XmlElement xe = (XmlElement)xnf;
                if (xe.GetAttribute("name") != "")
                {

                    //Response.Write(@""+xn.InnerXml+"");
                    Response.Write("姓名是：" + xe.GetAttribute("name") + "<br/>"); //显示属性值
                    Response.Write("性别：" + xe.GetAttribute("sex") + "<br/>");
                    XmlNode pass = xe.SelectSingleNode("pass");//获取某一个节点的内容
                    XmlNode Address = xe.SelectSingleNode("Address");
                    Response.Write("密码：" + pass.InnerText + "<br/>");
                    Response.Write("地址：" + Address.InnerText + "<br/>");
                    XmlNodeList xnf1 = xe.ChildNodes;
                    //foreach (XmlNode xn2 in xnf1)
                    //{

                    //    Response.Write(xn2.InnerText); //显示子节点点文本
                    //}
                }

            }

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            AddElement();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            deleteNode();
        }

    }

}

User.xml

 

<?xml version="1.0" encoding="utf-8"?>
<user>
  <person>
  </person>
  <person name="风云" sex="女" age="25">
    <pass>123</pass>
    <Address>昆明</Address>
  </person>  
</user>