xml读写删除

时间：2010-08-28 来源：二锅头

读取xml某节点的某个属性时，则先将xmlnode 转换成 XmlElement。

删除xml某个节点，如果用node.RemoveAll();的话就会留下节点名称，用node.ParentNode.RemoveChild(node);

就可以完全清除了。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml;
using System.Text;

namespace web
{
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            xmlpath = Server.MapPath(@"xml/fige.xml");
            read();
            save();
            Del();

        }

        public string xmlpath
        {
            get;
            set;
        }

        /// <summary>
        /// 读
        /// </summary>
        private void read()
        {
           
            XmlDocument document = new XmlDocument();
            document.Load(xmlpath);
            XmlNodeList nodelist = document.SelectNodes("xml/table");
            foreach (XmlNode node in nodelist)
            {
                XmlElement xmlelement = (XmlElement)node;
                string tablename = xmlelement.GetAttribute("name");
                XmlNodeList cnodelist = node.SelectNodes("column");
                foreach (XmlNode cnode in cnodelist)
                {
                    XmlElement celement = (XmlElement)cnode;
                    string columnkey = celement.GetAttribute("name");
                    string value = cnode.InnerXml;
                }

            }
        }

        /// <summary>
        /// 写
        /// </summary>
        private void save()
        {
            XmlDocument document = new XmlDocument();
            document.Load(xmlpath);
            XmlNodeList nodelist = document.SelectNodes("xml/table");
            foreach (XmlNode node in nodelist)
            {
                XmlElement xmlelement = (XmlElement)node;
                xmlelement.SetAttribute("name", "我最ae44");
                XmlNodeList cnodelist = node.SelectNodes("column");
                foreach (XmlNode cnode in cnodelist)
                {
                    cnode.InnerXml = "大家都说你知道啊";
                }
                 XmlElement xxxx= document.CreateElement("author");
                 xxxx.InnerXml = "a3dd";
                 node.AppendChild(xxxx);
                

            }
            document.Save(xmlpath);

        }

        /// <summary>
        /// 删除
        /// </summary>
        private void Del()
        {
            XmlDocument document = new XmlDocument();
            document.Load(xmlpath);
            XmlNodeList nodelist = document.SelectNodes("xml/table/author");
            foreach (XmlNode node in nodelist)
            {
                node.RemoveAll();
                node.ParentNode.RemoveChild(node);



            }
            document.Save(xmlpath);
        }

    }
}