C#操作Xml全集示例篇，基本实现添加，删除，更新等操作

using System;
using System.Xml;
using System.Xml.Xsl;
using System.Xml.XPath;
using System.Web;
namespace Library.ClassLibrary.XML
...{
    /**//// <summary>
    /// xml 的摘要说明。
    /// </summary>
    public class XML
    ...{
        public enum enumXmlPathType
        ...{
            AbsolutePath,
            VirtualPath
        }
        private string xmlFilePath ;
        private enumXmlPathType xmlFilePathType ;
        private XmlDocument xmlDoc = new XmlDocument() ;
        public string XmlFilePath
        ...{
            set
            ...{
                xmlFilePath = value ;
            }
        }
        public enumXmlPathType XmlFilePathTyp
        ...{
            set
            ...{
                xmlFilePathType = value ;
            }
        }
        public XML( string tempXmlFilePath )
        ...{
            //
            // TODO: 在此处添加构造函数逻辑
            //
            this.xmlFilePathType = enumXmlPathType.VirtualPath ;
            this.xmlFilePath = tempXmlFilePath ;
            GetXmlDocument() ;
            //xmlDoc.Load( xmlFilePath ) ;
        }
        public XML( string tempXmlFilePath , enumXmlPathType tempXmlFilePathType )
        ...{
            //
            // TODO: 在此处添加构造函数逻辑
            //
            this.xmlFilePathType = tempXmlFilePathType ;
            this.xmlFilePath = tempXmlFilePath ;
            GetXmlDocument() ;
        }
        /**//// </summary>
        /// <param name="strEntityTypeName">实体类的名称</param>
        /// <returns>指定的XML描述文件的路径</returns>
        private XmlDocument GetXmlDocument()
        ...{
            XmlDocument doc=null;
            if( this.xmlFilePathType == enumXmlPathType.AbsolutePath )
            ...{
                doc = GetXmlDocumentFromFile( xmlFilePath ) ;
            }
            else if( this.xmlFilePathType == enumXmlPathType.VirtualPath )
            ...{
                doc = GetXmlDocumentFromFile(HttpContext.Current.Server.MapPath(xmlFilePath)) ;
            }
            return doc;
        }
        private XmlDocument GetXmlDocumentFromFile(string tempXmlFilePath)
        ...{
            string xmlFileFullPath = tempXmlFilePath ;
                    xmlDoc.Load(xmlFileFullPath) ;
            return xmlDoc ;
        }
        读取指定节点的指定属性值#region 读取指定节点的指定属性值
        /**//// <summary>
        /// 功能:
        /// 读取指定节点的指定属性值
        /// 
        /// 参数:
        /// 参数一:节点名称
        /// 参数二:此节点的属性
        /// </summary>
        /// <param name="strNode"></param>
        /// <param name="strAttribute"></param>
        /// <returns></returns>
        public string GetXmlNodeValue(string strNode,string strAttribute)
        ...{
            string strReturn = "";
            try
            ...{
                //根据指定路径获取节点
                XmlNode xmlNode = xmlDoc.SelectSingleNode(strNode) ;            
                //获取节点的属性，并循环取出需要的属性值
                XmlAttributeCollection xmlAttr = xmlNode.Attributes ;
                for(int i=0 ;i<xmlAttr.Count; i++)
                ...{
                    if (xmlAttr.Item(i).Name == strAttribute)
                        strReturn = xmlAttr.Item(i).Value ;
                }
            }
            catch(XmlException xmle)
            ...{
                throw xmle ;
            }
            return strReturn ;
        }
        #endregion
 

        ...#region
        /**//// <summary>
        /// 功能:
        /// 读取指定节点的值
        /// 
        /// 参数:
        /// 参数:节点名称
        /// </summary>
        /// <param name="strNode"></param>
        /// <returns></returns>
        public string GetXmlNodeValue(string strNode)
        ...{
            string strReturn = String.Empty ;
            try
            ...{
                //根据路径获取节点
                XmlNode xmlNode = xmlDoc.SelectSingleNode(strNode) ;
                strReturn = xmlNode.InnerText ;
            }
            catch(XmlException xmle)
            ...{
                System.Console.WriteLine(xmle.Message) ;
            }
            return strReturn ;
        }
        #endregion
        设置节点值#region 设置节点值
        /**//// <summary>
        /// 功能:
        /// 设置节点值
        /// 
        /// 参数:
        ///    参数一:节点的名称
        ///    参数二:节点值
        ///    
        /// </summary>
        /// <param name="strNode"></param>
        /// <param name="newValue"></param>
        public void SetXmlNodeValue(string xmlNodePath,string xmlNodeValue)
        ...{
            try
            ...{
                //根据指定路径获取节点
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xmlNodePath) ;            
                //设置节点值
                xmlNode.InnerText = xmlNodeValue ;
            }
            catch(XmlException xmle)
            ...{
                throw xmle ;
            }
        }
        #endregion
        设置节点的属性值#region 设置节点的属性值
        /**//// <summary>
        /// 功能:
        /// 设置节点的属性值
        /// 
        /// 参数:
        /// 参数一:节点名称
        /// 参数二:属性名称
        /// 参数三:属性值
        /// 
        /// </summary>
        /// <param name="xmlNodePath"></param>
        /// <param name="xmlNodeAttribute"></param>
        /// <param name="xmlNodeAttributeValue"></param>
        public void SetXmlNodeValue(string xmlNodePath,string xmlNodeAttribute,string xmlNodeAttributeValue)
        ...{
            try
            ...{
                //根据指定路径获取节点
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xmlNodePath) ;
            
                //获取节点的属性，并循环取出需要的属性值
                XmlAttributeCollection xmlAttr = xmlNode.Attributes ;
                for(int i=0 ; i<xmlAttr.Count ; i++)
                ...{
                    if ( xmlAttr.Item(i).Name == xmlNodeAttribute )
                    ...{
                        xmlAttr.Item(i).Value = xmlNodeAttributeValue;
                        break ;
                    }
                }
            }
            catch(XmlException xmle)
            ...{
                throw xmle ;
            }
        }
        #endregion
        /**//// <summary>
        /// 获取XML文件的根元素
        /// </summary>
        public XmlNode GetXmlRoot()
        ...{
            return xmlDoc.DocumentElement ;
        }
        /**//// <summary>
        /// 在根节点下添加父节点
        /// </summary>
        public void AddParentNode(string parentNode)
        ...{
            XmlNode root = GetXmlRoot() ;
            XmlNode parentXmlNode = xmlDoc.CreateElement(parentNode) ;
            root.AppendChild(parentXmlNode) ;
        }
        /**//// <summary>
        /// 向一个已经存在的父节点中插入一个子节点
        /// </summary>
        public void AddChildNode( string parentNodePath,string childNodePath )
        ...{
            XmlNode parentXmlNode = xmlDoc.SelectSingleNode(parentNodePath) ;
            XmlNode childXmlNode = xmlDoc.CreateElement(childNodePath) ;
            parentXmlNode.AppendChild( childXmlNode ) ;
        }
        /**//// <summary>
        /// 向一个节点添加属性
        /// </summary>
        public void AddAttribute( string NodePath , string NodeAttribute)
        ...{
            XmlAttribute nodeAttribute = xmlDoc.CreateAttribute(NodeAttribute) ;
            XmlNode nodePath = xmlDoc.SelectSingleNode( NodePath ) ;
            nodePath.Attributes.Append(nodeAttribute) ;
        }
        /**//// <summary>
        /// 删除一个节点的属性
        /// </summary>
        public void DeleteAttribute( string NodePath , string NodeAttribute , string NodeAttributeValue)
        ...{
            XmlNodeList nodePath = xmlDoc.SelectSingleNode( NodePath ).ChildNodes;
            foreach(XmlNode xn in nodePath)
            ...{
                XmlElement xe=(XmlElement)xn;
                if(xe.GetAttribute(NodeAttribute)==NodeAttributeValue)
                ...{
                    xe.RemoveAttribute(NodeAttribute);//删除属性
                }
            }
        }
        /**//// <summary>
        /// 删除一个节点
        /// </summary>
        public void DeleteXmlNode(string tempXmlNode)
        ...{
            //XmlNodeList xmlNodePath=xmlDoc.SelectSingleNode(tempXmlNode).ChildNodes;
            XmlNode xmlNodePath = xmlDoc.SelectSingleNode( tempXmlNode ) ;
            xmlNodePath.ParentNode.RemoveChild( xmlNodePath ) ;
            //foreach(XmlNode xn in xmlNodePath)
            //{
                //XmlElement xe=(XmlElement)xn;
                //xe.RemoveAll();
                //xe.RemoveChild(xn);
                //xn.RemoveAll();
                //if(xe.HasChildNodes)
                //{
                    //foreach(XmlNode xn in xe)
                    //{
                        //xn.RemoveAll();//删除所有子节点和属性
                    //}
                //}
            //}
        }

        保存XML文件#region 保存XML文件
        /**//// <summary>
        /// 功能: 
        /// 保存XML文件
        /// 
        /// </summary>
        public void SaveXmlDocument()
        ...{
            try
            ...{
                //保存设置的结果
                xmlDoc.Save( HttpContext.Current.Server.MapPath( xmlFilePath ) );
            }
            catch(XmlException xmle)
            ...{
                throw xmle;
            }
        }
        #endregion
 
 
        保存XML文件#region 保存XML文件
        /**//// <summary>
        /// 功能: 
        /// 保存XML文件
        /// 
        /// </summary>
        public void SaveXmlDocument(string tempXMLFilePath)
        ...{
            try
            ...{
                //保存设置的结果
                xmlDoc.Save(tempXMLFilePath);
            }
            catch(XmlException xmle)
            ...{
                throw xmle;
            }
        }
        #endregion
 
    }
}

XmlAction.aspx文件
<%@ Page language="c#" Codebehind="XmlAction.aspx.cs" AutoEventWireup="false" Inherits="Web.Club.Xml2004.XmlAction" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
    <HEAD>
        <title>test</title>
        <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
        <meta name="CODE_LANGUAGE" Content="C#">
        <meta name="vs_defaultClientScript" content="JavaScript">
        <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
    </HEAD>
    <body MS_POSITIONING="GridLayout">
        <form id="Form1" method="post" runat="server">
            <asp:Button id="btnAdd" style="Z-INDEX: 101; LEFT: 32px; POSITION: absolute; TOP: 88px" runat="server"
                Text="添加Data节点"></asp:Button>
            <asp:Button id="btnDelete" style="Z-INDEX: 102; LEFT: 176px; POSITION: absolute; TOP: 88px"
                runat="server" Text="删除最后一个节点"></asp:Button>
            <asp:Button id="btnModify" style="Z-INDEX: 103; LEFT: 360px; POSITION: absolute; TOP: 88px"
                runat="server" Width="144px" Text="修改节点值"></asp:Button>
            <asp:Button id="btnModifyAttribute" style="Z-INDEX: 104; LEFT: 368px; POSITION: absolute; TOP: 136px"
                runat="server" Width="136px" Height="24px" Text="修改节点的属性值"></asp:Button>
        </form>
    </body>
</HTML>

XmlAction.cs文件
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Library.ClassLibrary.XML;
namespace Web.Club.Xml2004
...{
    /**//// <summary>
    /// test 的摘要说明。
    /// </summary>
    public class XmlAction : System.Web.UI.Page
    ...{
        protected System.Web.UI.WebControls.Button btnAdd;
        protected System.Web.UI.WebControls.Button btnDelete;
        protected System.Web.UI.WebControls.Button btnModify;
        protected System.Web.UI.WebControls.Button btnModifyAttribute;
    
        protected XML myXML;
        private void Page_Load(object sender, System.EventArgs e)
        ...{
            // 在此处放置用户代码以初始化页面
            myXML=new XML("test.xml");
        }
        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        ...{
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        ...{    
            this.btnAdd.Click += new System.EventHandler(this.btnAdd_OnClick);
            this.btnDelete.Click += new System.EventHandler(this.btnDelete_OnClick);
            this.btnModify.Click += new System.EventHandler(this.btnModifyNode_OnClick);
            this.btnModifyAttribute.Click += new System.EventHandler(this.btnModifyAttribute_OnClick);
            this.Load += new System.EventHandler(this.Page_Load);
        }
        #endregion
        private void btnAdd_OnClick(object sender, System.EventArgs e)
        ...{
        
            string tempDates = System.DateTime.Now.ToString();
            myXML.AddParentNode("Data");
            myXML.AddChildNode("//Data[last()]","Id");
            myXML.SetXmlNodeValue("//Data[last()]/Id",Session.SessionID.ToString()+Guid.NewGuid().ToString());
            myXML.AddChildNode("//Data[last()]","Subject");
            myXML.SetXmlNodeValue("//Data[last()]/Subject","这是第一个测试");
            myXML.AddChildNode("//Data[last()]","Content");
            myXML.SetXmlNodeValue("//Data[last()]/Content","好象还是有点问题,添加节点的时候XPath有点麻烦!");
            myXML.AddChildNode("//Data[last()]","Img");
                myXML.AddAttribute("//Data[last()]/Img","hasImg");
                myXML.SetXmlNodeValue("//Data[last()]/Img","hasImg","1");
                    myXML.AddChildNode("//Data[last()]/Img","ImgUrl");
                    myXML.SetXmlNodeValue("//Data[last()]/Img/ImgUrl","http://172.16.26.99/text.jpg");
            myXML.AddChildNode("//Data[last()]","Dates");
            myXML.SetXmlNodeValue("//Data[last()]/Dates",tempDates);
            myXML.SaveXmlDocument();
        }
        private void btnDelete_OnClick(object sender, System.EventArgs e)
        ...{
            myXML.DeleteXmlNode("//Data[last()]");
            myXML.SaveXmlDocument();
        
        }
        private void btnModifyNode_OnClick(object sender, System.EventArgs e)
        ...{
        
            myXML.SetXmlNodeValue("//Data[last()]/Subject","已经被修改");
            myXML.SaveXmlDocument();
        }
        private void btnModifyAttribute_OnClick(object sender, System.EventArgs e)
        ...{
        
            myXML.SetXmlNodeValue("//Data[last()]/Img","hasImg","0");
            myXML.SaveXmlDocument();
        }
    }
}

XmlAction.sxd文件
<?xml version="1.0" encoding="utf-8" ?>
<xs:schema id="testSchema" targetNamespace="http://tempuri.org/testSchema.xsd" elementFormDefault="qualified"
    xmlns="http://tempuri.org/testSchema.xsd" xmlns:mstns="http://tempuri.org/testSchema.xsd"
    xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="Blog">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="Id" type="xs:int"></xs:element>
                <xs:element name="Subject" type="xs:string" />
                <xs:element name="Content" type="xs:string" />
                <xs:element name="Img">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="ImgUrl" />
                        </xs:sequence>
                        <xs:attribute name="hasImg" type="xs:int" />
                    </xs:complexType>
                </xs:element>
                <xs:element name="Dates" type="xs:dateTime" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

XmlAction.xml文件
<?xml version="1.0" encoding="utf-8"?>
<Blog>
  <Data>
    <Id>0</Id>
    <Subject>My First Test</Subject>
    <Content>OK...</Content>
    <Img hasImg="1">
      <ImgUrl>http://172.16.26.99/test.jpg</ImgUrl>
    </Img>
    <Dates>2004-08-14</Dates>
  </Data>
  <Data>
    <Id>2dah53nr5viplyqga5w5ws45e0573bec-69be-4e5c-9ac5-bb028adbe98f</Id>
    <Subject>这是第一个测试</Subject>
    <Content>好象还是有点问题,添加节点的时候XPath有点麻烦!</Content>
    <Img hasImg="1">
      <ImgUrl>http://172.16.26.99/text.jpg</ImgUrl>
    </Img>
    <Dates>2004-8-18 23:04:07</Dates>
  </Data>
  <Data>
    <Id>2dah53nr5viplyqga5w5ws45653396b4-cf18-4288-966d-fa6385033fb1</Id>
    <Subject>这是第一个测试</Subject>
    <Content>好象还是有点问题,添加节点的时候XPath有点麻烦!</Content>
    <Img hasImg="1">
      <ImgUrl>http://172.16.26.99/text.jpg</ImgUrl>
    </Img>
    <Dates>2004-8-18 23:04:10</Dates>
  </Data>
  <Data>
    <Id>2dah53nr5viplyqga5w5ws45b6f03405-4c0d-4ba5-bba5-12e42b211dac</Id>
    <Subject>这是第一个测试</Subject>
    <Content>好象还是有点问题,添加节点的时候XPath有点麻烦!</Content>
    <Img hasImg="0">
      <ImgUrl>http://172.16.26.99/text.jpg</ImgUrl>
    </Img>
    <Dates>2004-8-18 23:04:11</Dates>
  </Data>
</Blog> 

 

http://blog.csdn.net/lg836/archive/2007/07/01/1674814.aspx