XML 增删查改

最新推荐文章于 2023-04-28 00:18:58 发布

转载最新推荐文章于 2023-04-28 00:18:58 发布 · 61 阅读

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原文链接：http://www.cnblogs.com/jimmypony/archive/2008/09/02/1282119.html

本文介绍了一个.NET应用程序中如何使用C#来实现对XML文件的基本操作，包括添加、删除和编辑节点。通过具体的代码示例展示了如何定位到特定节点并进行修改。

直接贴代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Xml;

namespace Myshop.MyShop
{
    public class XMLEditor
    {
        /// <summary>
        /// 删除节点
        /// </summary>
        /// <param name="xmlPath"></param>
        /// <param name="id"></param>
        /// <returns></returns>
        public static bool DeleteNode(string xmlPath, string id)
        {
            XmlDocument xml = new XmlDocument();            //新建xml文档
            xml.Load(xmlPath);                              //载入文件
            XmlNode root = xml.SelectSingleNode("root");    //获取根节点
            XmlNode doc = null;                             //定义节点
            GetXmlDoc(root, id, ref doc);                   //获取要处理的节点
            if (doc != null)
            {
                doc.ParentNode.RemoveChild(doc);            //删除自己
                xml.Save(xmlPath);                          //保存
                return true;
            }
            else
                return false;
        }

        /// <summary>
        /// 添加新节点
        /// </summary>
        /// <param name="xmlPath"></param>
        /// <param name="level"></param>
        /// <param name="fatherid"></param>
        /// <param name="name"></param>
        /// <returns></returns>
        public static bool AddNode(string xmlPath, string level, string fatherid, string name)
        {
            XmlDocument xml = new XmlDocument();
            xml.Load(xmlPath);
            XmlNode root = xml.SelectSingleNode("root");
            XmlElement element = xml.CreateElement("type");         //新建节点
            element.SetAttribute("name", name);                     //添加标签
            element.SetAttribute("level", level);
            element.SetAttribute("fatherid", fatherid);
            XmlNode doc = null;
            GetXmlDoc(root, fatherid,ref doc);
            if (doc != null)
            {
                doc.AppendChild(element as XmlNode);                //添加child
                xml.Save(xmlPath);
                return true;
            }
            else
                return false;
        }

        /// <summary>
        /// 编辑节点
        /// </summary>
        /// <param name="xmlPath"></param>
        /// <param name="id"></param>
        /// <param name="level"></param>
        /// <param name="fatherid"></param>
        /// <param name="name"></param>
        /// <returns></returns>
        public static bool EditNode(string xmlPath, string id, string level, string fatherid, string name)
        {
            XmlDocument xml = new XmlDocument();
            xml.Load(xmlPath);
            XmlNode root = xml.SelectSingleNode("root");
            XmlNode doc=null;
            GetXmlDoc(root, fatherid,ref doc);
            if (doc != null)
            {
                XmlElement element = doc as XmlElement;             //XmlNode转XmlElement更新
                element.SetAttribute("id", id);
                element.SetAttribute("name", name);
                element.SetAttribute("level", level);
                element.SetAttribute("fatherid", fatherid);
                xml.Save(xmlPath);
                return true;
            }
            else
                return false;
        }

        /// <summary>
        /// 递归查找节点
        /// </summary>
        /// <param name="node">起始节点</param>
        /// <param name="id">attr</param>
        private static void GetXmlDoc(XmlNode node,string id,ref XmlNode myNode)
        {
            foreach (XmlNode xml in node.ChildNodes)
            {
                if (xml.Attributes["id"].Value == id)
                    myNode = xml;
                else
                    GetXmlDoc(xml, id, ref myNode);
            }
        }
    }
}

Code

<root>
  <type id="1" name="aa" level="1" fatherid="0">
    <type id="2" name="bb" level="2" fatherid="1">
    </type>
    <type id="4" name="ccc" level="2" fatherid="1" />
    <type id="9" name="sss" level="2" fatherid="1" />
  </type>
  <type id="3" name="cc" level="1" fatherid="0">
  </type>
</root>

转载于:https://www.cnblogs.com/jimmypony/archive/2008/09/02/1282119.html