xml操作类,具体用法看注释

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Xml; namespace JqueryAjax.Code.Tools{    /// <summary>    /// XMLHelper XML文档操作管理器    /// </summary>    public class XMLHelper    {        #region XML文档节点查询和读取        /// <summary>        /// 选择匹配XPath表达式的第一个节点XmlNode.        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名")</param>        /// <returns>返回XmlNode</returns>        public static XmlNode GetXmlNodeByXpath(string xmlFileName, string xpath)        {            XmlDocument xmlDoc = new XmlDocument();            try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);                return xmlNode;            }            catch (Exception ex)            {                return null;                //throw ex; //这里可以定义你自己的异常处理            }        }         /// <summary>        /// 选择匹配XPath表达式的节点列表XmlNodeList.        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名")</param>        /// <returns>返回XmlNodeList</returns>        public static XmlNodeList GetXmlNodeListByXpath(string xmlFileName, string xpath)        {            XmlDocument xmlDoc = new XmlDocument();             try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNodeList xmlNodeList = xmlDoc.SelectNodes(xpath);                return xmlNodeList;            }            catch (Exception ex)            {                return null;                //throw ex; //这里可以定义你自己的异常处理            }        }         /// <summary>        /// 选择匹配XPath表达式的第一个节点的匹配xmlAttributeName的属性XmlAttribute.        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>        /// <param name="xmlAttributeName">要匹配xmlAttributeName的属性名称</param>        /// <returns>返回xmlAttributeName</returns>        public static XmlAttribute GetXmlAttribute(string xmlFileName, string xpath, string xmlAttributeName)        {            string content = string.Empty;            XmlDocument xmlDoc = new XmlDocument();            XmlAttribute xmlAttribute = null;            try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);                if (xmlNode != null)                {                    if (xmlNode.Attributes.Count > 0)                    {                        xmlAttribute = xmlNode.Attributes[xmlAttributeName];                    }                }            }            catch (Exception ex)            {                throw ex; //这里可以定义你自己的异常处理            }            return xmlAttribute;        }        #endregion         #region XML文档创建和节点或属性的添加、修改        /// <summary>        /// 创建一个XML文档        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="rootNodeName">XML文档根节点名称(须指定一个根节点名称)</param>        /// <param name="version">XML文档版本号(必须为:"1.0")</param>        /// <param name="encoding">XML文档编码方式</param>        /// <param name="standalone">该值必须是"yes"或"no",如果为null,Save方法不在XML声明上写出独立属性</param>        /// <returns>成功返回true,失败返回false</returns>        public static bool CreateXmlDocument(string xmlFileName, string rootNodeName, string version, string encoding, string standalone)        {            bool isSuccess = false;            try            {                XmlDocument xmlDoc = new XmlDocument();                XmlDeclaration xmlDeclaration = xmlDoc.CreateXmlDeclaration(version, encoding, standalone);                XmlNode root = xmlDoc.CreateElement(rootNodeName);                xmlDoc.AppendChild(xmlDeclaration);                xmlDoc.AppendChild(root);                xmlDoc.Save(xmlFileName);                isSuccess = true;            }            catch (Exception ex)            {                throw ex; //这里可以定义你自己的异常处理            }            return isSuccess;        }         /// <summary>        /// 依据匹配XPath表达式的第一个节点来创建它的子节点(如果此节点已存在则追加一个新的同名节点        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>        /// <param name="xmlNodeName">要匹配xmlNodeName的节点名称</param>        /// <param name="innerText">节点文本值</param>        /// <param name="xmlAttributeName">要匹配xmlAttributeName的属性名称</param>        /// <param name="value">属性值</param>        /// <returns>成功返回true,失败返回false</returns>        public static bool CreateXmlNodeByXPath(string xmlFileName, string xpath, string xmlNodeName, string innerText, string xmlAttributeName, string value)        {            bool isSuccess = false;            XmlDocument xmlDoc = new XmlDocument();            try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);                if (xmlNode != null)                {                    //存不存在此节点都创建                    XmlElement subElement = xmlDoc.CreateElement(xmlNodeName);                    subElement.InnerXml = innerText;                     //如果属性和值参数都不为空则在此新节点上新增属性                    if (!string.IsNullOrEmpty(xmlAttributeName) && !string.IsNullOrEmpty(value))                    {                        XmlAttribute xmlAttribute = xmlDoc.CreateAttribute(xmlAttributeName);                        xmlAttribute.Value = value;                        subElement.Attributes.Append(xmlAttribute);                    }                     xmlNode.AppendChild(subElement);                }                xmlDoc.Save(xmlFileName); //保存到XML文档                isSuccess = true;            }            catch (Exception ex)            {                throw ex; //这里可以定义你自己的异常处理            }            return isSuccess;        }         /// <summary>        /// 依据匹配XPath表达式的第一个节点来创建或更新它的子节点(如果节点存在则更新,不存在则创建)        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>        /// <param name="xmlNodeName">要匹配xmlNodeName的节点名称</param>        /// <param name="innerText">节点文本值</param>        /// <returns>成功返回true,失败返回false</returns>        public static bool CreateOrUpdateXmlNodeByXPath(string xmlFileName, string xpath, string xmlNodeName, string innerText)        {            bool isSuccess = false;            bool isExistsNode = false;//标识节点是否存在            XmlDocument xmlDoc = new XmlDocument();            try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);                if (xmlNode != null)                {                    //遍历xpath节点下的所有子节点                    foreach (XmlNode node in xmlNode.ChildNodes)                    {                        if (node.Name.ToLower() == xmlNodeName.ToLower())                        {                            //存在此节点则更新                            node.InnerXml = innerText;                            isExistsNode = true;                            break;                        }                    }                    if (!isExistsNode)                    {                        //不存在此节点则创建                        XmlElement subElement = xmlDoc.CreateElement(xmlNodeName);                        subElement.InnerXml = innerText;                        xmlNode.AppendChild(subElement);                    }                }                xmlDoc.Save(xmlFileName); //保存到XML文档                isSuccess = true;            }            catch (Exception ex)            {                throw ex; //这里可以定义你自己的异常处理            }            return isSuccess;        }

/// <summary>        /// 依据匹配XPath表达式的第一个节点来创建或更新它的属性(如果属性存在则更新,不存在则创建)        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>        /// <param name="xmlAttributeName">要匹配xmlAttributeName的属性名称</param>        /// <param name="value">属性值</param>        /// <returns>成功返回true,失败返回false</returns>        public static bool CreateOrUpdateXmlAttributeByXPath(string xmlFileName, string xpath, string xmlAttributeName, string value)        {            bool isSuccess = false;            bool isExistsAttribute = false;//标识属性是否存在            XmlDocument xmlDoc = new XmlDocument();            try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);                if (xmlNode != null)                {                    //遍历xpath节点中的所有属性                    foreach (XmlAttribute attribute in xmlNode.Attributes)                    {                        if (attribute.Name.ToLower() == xmlAttributeName.ToLower())                        {                            //节点中存在此属性则更新                            attribute.Value = value;                            isExistsAttribute = true;                            break;                        }                    }                    if (!isExistsAttribute)                    {                        //节点中不存在此属性则创建                        XmlAttribute xmlAttribute = xmlDoc.CreateAttribute(xmlAttributeName);                        xmlAttribute.Value = value;                        xmlNode.Attributes.Append(xmlAttribute);                    }                }                xmlDoc.Save(xmlFileName); //保存到XML文档                isSuccess = true;            }            catch (Exception ex)            {                throw ex; //这里可以定义你自己的异常处理            }            return isSuccess;        }        #endregion          #region XML文档节点或属性的删除        /// <summary>        /// 删除匹配XPath表达式的第一个节点(节点中的子元素同时会被删除)        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>        /// <returns>成功返回true,失败返回false</returns>        public static bool DeleteXmlNodeByXPath(string xmlFileName, string xpath)        {            bool isSuccess = false;            XmlDocument xmlDoc = new XmlDocument();            try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);                if (xmlNode != null)                {                    //删除节点                    xmlNode.ParentNode.RemoveChild(xmlNode);                }                xmlDoc.Save(xmlFileName); //保存到XML文档                isSuccess = true;            }            catch (Exception ex)            {                throw ex; //这里可以定义你自己的异常处理            }            return isSuccess;        }         /// <summary>        /// 删除匹配XPath表达式的第一个节点中的匹配参数xmlAttributeName的属性        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>        /// <param name="xmlAttributeName">要删除的xmlAttributeName的属性名称</param>        /// <returns>成功返回true,失败返回false</returns>        public static bool DeleteXmlAttributeByXPath(string xmlFileName, string xpath, string xmlAttributeName)        {            bool isSuccess = false;            bool isExistsAttribute = false;            XmlDocument xmlDoc = new XmlDocument();            try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);                XmlAttribute xmlAttribute = null;                if (xmlNode != null)                {                    //遍历xpath节点中的所有属性                    foreach (XmlAttribute attribute in xmlNode.Attributes)                    {                        if (attribute.Name.ToLower() == xmlAttributeName.ToLower())                        {                            //节点中存在此属性                            xmlAttribute = attribute;                            isExistsAttribute = true;                            break;                        }                    }                    if (isExistsAttribute)                    {                        //删除节点中的属性                        xmlNode.Attributes.Remove(xmlAttribute);                    }                }                xmlDoc.Save(xmlFileName); //保存到XML文档                isSuccess = true;            }            catch (Exception ex)            {                throw ex; //这里可以定义你自己的异常处理            }            return isSuccess;        }         /// <summary>        /// 删除匹配XPath表达式的第一个节点中的所有属性        /// </summary>        /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>        /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>        /// <returns>成功返回true,失败返回false</returns>        public static bool DeleteAllXmlAttributeByXPath(string xmlFileName, string xpath)        {            bool isSuccess = false;            XmlDocument xmlDoc = new XmlDocument();            try            {                xmlDoc.Load(xmlFileName); //加载XML文档                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);                if (xmlNode != null)                {                    //遍历xpath节点中的所有属性                    xmlNode.Attributes.RemoveAll();                }                xmlDoc.Save(xmlFileName); //保存到XML文档                isSuccess = true;            }            catch (Exception ex)            {                throw ex; //这里可以定义你自己的异常处理            }            return isSuccess;        }        #endregion       }}