细致引见XML操纵总结的示例代码【XML教程】,XML操作

在开辟过程当中对XML的运用不是太多，要用到时候也是想办法绕过去，近来一个同事给了一个细致的操纵。分享一下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
 
using System.Xml;
 
namespace RenShiExport
{
 
 
    /// <summary>
    /// XMLHelper XML文档操纵管理器
    /// </summary>
    public class XMLHelper
    {
        public XMLHelper()
        {
            //
            // TODO: 在此处增加组织函数逻辑
            //
        }
 
 
        #region XML文档节点查询和读取
        /// <summary>
        /// 挑选婚配XPath表达式的第一个节点XmlNode.
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//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; //这里能够定义你本身的非常处置惩罚
            }
        }
 
        /// <summary>
        /// 挑选婚配XPath表达式的节点列表XmlNodeList.
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//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; //这里能够定义你本身的非常处置惩罚
            }
        }
 
        /// <summary>
        /// 挑选婚配XPath表达式的第一个节点的婚配xmlAttributeName的属性XmlAttribute.
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//节点名//子节点名</param>
        /// <param name="xmlAttributeName">要婚配xmlAttributeName的属性称号</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; //这里能够定义你本身的非常处置惩罚
            }
            return xmlAttribute;
        }
        #endregion
 
        #region XML文档建立和节点或属性的增加、修正
        /// <summary>
        /// 建立一个XML文档
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="rootNodeName">XML文档根节点称号(须指定一个根节点称号)</param>
        /// <param name="version">XML文档版本号(必需为:"1.0")</param>
        /// <param name="encoding">XML文档编码体式格局</param>
        /// <param name="standalone">该值必需是"yes"或"no",假如为null,Save要领不在XML声明上写出自力属性</param>
        /// <returns>胜利返回true,失利返回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; //这里能够定义你本身的非常处置惩罚
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 根据婚配XPath表达式的第一个节点来建立它的子节点(假如此节点已存在则追加一个新的同名节点
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//节点名//子节点名</param>
        /// <param name="xmlNodeName">要婚配xmlNodeName的节点称号</param>
        /// <param name="innerText">节点文本值</param>
        /// <param name="xmlAttributeName">要婚配xmlAttributeName的属性称号</param>
        /// <param name="value">属性值</param>
        /// <returns>胜利返回true,失利返回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)
                {
                    //存不存在此节点都建立
                    XmlElement subElement = xmlDoc.CreateElement(xmlNodeName);
                    subElement.InnerXml = innerText;
 
                    //假如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; //这里能够定义你本身的非常处置惩罚
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 根据婚配XPath表达式的第一个节点来建立或更新它的子节点(假如节点存在则更新,不存在则建立)
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//节点名//子节点名</param>
        /// <param name="xmlNodeName">要婚配xmlNodeName的节点称号</param>
        /// <param name="innerText">节点文本值</param>
        /// <returns>胜利返回true,失利返回false</returns>
        public static bool CreateOrUpdateXmlNodeByXPath(string xmlFileName, string xpath, string xmlNodeName, string innerText)
        {
            bool isSuccess = false;
            bool isExistsNode = false;//标识节点是不是存在
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加载XML文档
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                if (xmlNode != null)
                {
                    //遍历xpath节点下的一切子节点
                    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)
                    {
                        //不存在此节点则建立
                        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; //这里能够定义你本身的非常处置惩罚
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 根据婚配XPath表达式的第一个节点来建立或更新它的属性(假如属性存在则更新,不存在则建立)
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//节点名//子节点名</param>
        /// <param name="xmlAttributeName">要婚配xmlAttributeName的属性称号</param>
        /// <param name="value">属性值</param>
        /// <returns>胜利返回true,失利返回false</returns>
        public static bool CreateOrUpdateXmlAttributeByXPath(string xmlFileName, string xpath, string xmlAttributeName, string value)
        {
            bool isSuccess = false;
            bool isExistsAttribute = false;//标识属性是不是存在
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加载XML文档
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                if (xmlNode != null)
                {
                    //遍历xpath节点中的一切属性
                    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建立
                        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; //这里能够定义你本身的非常处置惩罚
            }
            return isSuccess;
        }
        #endregion
 
 
        #region XML文档节点或属性的删除
        /// <summary>
        /// 删除婚配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文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//节点名//子节点名</param>
        /// <returns>胜利返回true,失利返回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; //这里能够定义你本身的非常处置惩罚
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 删除婚配XPath表达式的第一个节点中的婚配参数xmlAttributeName的属性
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//节点名//子节点名</param>
        /// <param name="xmlAttributeName">要删除的xmlAttributeName的属性称号</param>
        /// <returns>胜利返回true,失利返回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节点中的一切属性
                    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; //这里能够定义你本身的非常处置惩罚
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 删除婚配XPath表达式的第一个节点中的一切属性
        /// </summary>
        /// <param name="xmlFileName">XML文档完整文件名(包括物理途径)</param>
        /// <param name="xpath">要婚配的XPath表达式(比方:"//节点名//子节点名</param>
        /// <returns>胜利返回true,失利返回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节点中的一切属性
                    xmlNode.Attributes.RemoveAll();
                }
                xmlDoc.Save(xmlFileName); //保存到XML文档
                isSuccess = true;
            }
            catch (Exception ex)
            {
                throw ex; //这里能够定义你本身的非常处置惩罚
            }
            return isSuccess;
        }
        #endregion
 
    }
}

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