C# XML操作实用指南-优快云博客

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Collections;

namespace ConsoleApplication2
{
    class XMLHelper
    {
        //  <param name="xmlPath">Xml文档路径</param>
        //  <param name="MainNode">当前节点路径</param>
        //  <param name="Element">新节点</param>
        //  <param name="Attrib">属性名称</param>
        //  <param name="AttribContent">属性值</param>
        //  <param name="Content">新节点值</param>



        //根节点下添加父节点
        public static void AddParentNode(string xmlPath,string parentNode)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);  
            //创建一个新的member节点并添加到根节点下
            XmlElement node = xdoc.CreateElement(parentNode);
            xdoc.DocumentElement.PrependChild(node);
            xdoc.Save(xmlPath);
        }

        //插一节点，带一属性
        public static void XmlInsertElement(string xmlPath,string mainNode,string element,
                                                            string attrib,string attribContent,string content)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            XmlNode objNode = xdoc.SelectSingleNode(mainNode);
            XmlElement objElement = xdoc.CreateElement(element);
            objElement.SetAttribute(attrib,attribContent);
            objElement.InnerText = content;
            objNode.AppendChild(objElement);
            xdoc.Save(xmlPath);
         }


        //插入一个节点，不带属性
        public static void XmlInsertElement(string xmlPath, string MainNode, string Element, string Content)
        {
            XmlDocument objXmlDoc = new XmlDocument();
            objXmlDoc.Load(xmlPath);
            XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
            XmlElement objElement = objXmlDoc.CreateElement(Element);
            objElement.InnerText = Content;
            objNode.AppendChild(objElement);
            objXmlDoc.Save(xmlPath);
        }

        //  向一节点添加属性
        //  <param name="xmlPath">xml文件路径</param>
        //  <param name="NodePath">节点路径</param>
        //  <param name="NodeAttribute1">要添加的节点属性的名称</param>
        //  <param name="NodeAttributeText">要添加属性的值</param>
        public static void AddAttribute(string xmlPath,string nodePath1,string nodeAttribute1,string nodeAttributeText)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            XmlAttribute nodeAttribute = xdoc.CreateAttribute(nodeAttribute1);  //特性
            XmlNode nodePath = xdoc.SelectSingleNode(nodePath1);
            nodePath.Attributes.Append(nodeAttribute);
            XmlElement xe = (XmlElement)nodePath;
            xe.SetAttribute(nodeAttribute1,nodeAttributeText);
            xdoc.Save(xmlPath);
        }



        //更新XML节点内容
        //  <param name="xmlPath">xml路径</param>
        //  <param name="Node">要更换内容的节点:节点路径 根节点/父节点/当前节点</param>
        //  <param name="Content">新的内容</param>
        public static void XmlNodeReplace(string xmlPath,string node,string content)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            xdoc.SelectSingleNode(node).InnerText = content;
            xdoc.Save(xmlPath);
        }

        //更新XML节点的属性值
        //  <param name="xmlPath">文件路径</param>
        //  <param name="NodePath">节点路径</param>
        //  <param name="NodeAttribute1">要更改的节点属性的名称</param>
        //  <param name="NodeAttributeText">更改的属性值</param>
        public static void XmlAttributeEide(string xmlPath,string nodePath1,string nodeAttribute1,string nodeAttributeText1)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            XmlNode nodePath = xdoc.SelectSingleNode(nodePath1);
            XmlElement xe = (XmlElement)nodePath;
            xe.SetAttribute(nodeAttribute1,nodeAttributeText1);
            xdoc.Save(xmlPath);
        }

        // 读取XML到DataSet
        public static DataSet GetXml(string xmlPath)
        {
            DataSet ds = new DataSet();
            ds.ReadXml(@xmlPath);
            return ds;
        }

        //读取XML，返回一个节点值  读取xml文档并返回一个节点:适用于一级节点
        public static string ReadXmlReturnNode(string xmlPath,string node)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            XmlNodeList xnlist = xdoc.GetElementsByTagName(node);
            return xnlist.Item(0).InnerText.ToString();
        }


        //查找数据，返回当前节点的下级节点，填充到一个DataSet中
        public static DataSet GetXml(string xmlPath,string xmlPathNode)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            DataSet ds = new DataSet();
            StringReader reader = new StringReader(xdoc.SelectSingleNode(xmlPath).OuterXml);
            ds.ReadXml(reader);
            return ds;
        }

        //读取指定节点的指定属性值
        public string GetXmlNodeAttribute(string xmlPath,string strNode,string strAttribute)
        {
            string strReturn = "";
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            try
            {
                XmlNode xmlNode = xdoc.SelectSingleNode(strNode);
                //获得节点的属性，并循环取出需要的属性
                XmlAttributeCollection xmlAttr = xmlNode.Attributes;
                for (int i = 0; i < xmlAttr.Count; i++)
                {
                    if (xmlAttr.Item(i).Name==strAttribute)
                    {
                        strReturn = xmlAttr.Item(i).Value;
                    }
                }
            }
            catch (Exception ee)
            {
            }
            return strReturn;
        }

        //读取指定节点的值
        public string getXmlNodeValue(string xmlPath,string strNode)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            string strReturn="";
            try
            {
                //根据路径获取节点
                XmlNode xmlNode = xdoc.SelectSingleNode(strNode);
                strReturn = xmlNode.InnerText;
            }
            catch (Exception ee)
            {   
                throw;
            }
            return strReturn;
        }


        //根据节点属性读取子节点的值
        public static ArrayList GetSubElementByAttribute(string xmlPath,string fatherElement,string attributeName,string attributeValue,int arrayLength)
        {
            ArrayList al = new ArrayList();
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            XmlNodeList xnlist;
            xnlist = xdoc.DocumentElement.SelectNodes("//"+fatherElement+"["+@attributeName+"='"+attributeValue+"']");
            XmlNodeList xxlist = xnlist.Item(0).ChildNodes;
            for (int i = 0; i < arrayLength&&i<xxlist.Count; i++)
            {
                al.Add(xxlist.Item(i).InnerText);
            }
            return al;
        }


        //删除一个节点
        public static void XmlNodeDelete(string xmlPath,string node)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            string mainNode = node.Substring(0,node.LastIndexOf("/"));
            xdoc.SelectSingleNode(mainNode).RemoveChild(xdoc.SelectSingleNode(node));
            xdoc.Save(xmlPath);
        }

        //删除一个节点属性
        public static void XmlNodeAttributeDelete(string xmlPath,string nodePath1,string nodeAttribute)
        {
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(xmlPath);
            XmlNode nodepath = xdoc.SelectSingleNode(nodePath1);
            XmlElement xe = (XmlElement)nodepath;
            xe.RemoveAttribute(nodeAttribute);
            xdoc.Save(xmlPath);
        }


    }
}












namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            string xmlPath = @"F:\前研\测试网页\WinForm\ConsoleApplication2\ConsoleApplication2\XMLFile1.xml";
              XMLHelper.AddParentNode(xmlPath,"textNode");
              XMLHelper.XmlInsertElement(xmlPath, "phonebook", "textele", "shixingName", "9", "zhi");
              XMLHelper.XmlInsertElement(xmlPath,"phonebook","element001","123456");

              XMLHelper.AddParentNode(xmlPath, "member");
              XMLHelper.AddAttribute(xmlPath,"phonebook/member","id","7");
              XMLHelper.XmlInsertElement(xmlPath,"//member[@id=\"7\"]","qq","123123123");
              XMLHelper.XmlNodeReplace(xmlPath,"//member[@id=6]/name","aaa");
              XMLHelper.XmlNodeReplace(xmlPath, "//member[qq='5465']/name", "aaa");
              XMLHelper.XmlAttributeEide(xmlPath, "//member[@id=6]/name", "cc", "bb");

              XMLHelper.XmlInsertElement(xmlPath, "phonebook", "sqlConn", "server=.;uid=sa;pwd=sa");
              string strConn= XMLHelper.getXmlNodeValue(xmlPath,"phonebook/member[@id=6]/qq");
              Console.WriteLine(strConn);
              XMLHelper.GetXmlNodeAttribute(xmlPath, "phonebook/member", "id");

            XMLHelper.GetSubElementByAttribute(xmlPath,"phonebook",7);
            Console.Read();
        }
    }
}
XmlHelper
