C#操作xml工具类
jopen
11年前
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Xml; using System.IO; namespace Helper { public class xmlHelper { #region 字段 /// <summary> /// xml文件物理路径 /// </summary> private string _FilePath = string.Empty; /// <summary> /// xml文档 /// </summary> private XmlDocument _xml; /// <summary> /// xml文档根节点 /// </summary> private XmlElement _element; #endregion public xmlHelper() { // } /// <summary> /// 给xml文档路径赋值 /// </summary> /// <param name="xmlFilePath"></param> public xmlHelper(string xmlFilePath) { _FilePath = xmlFilePath; } /// <summary> /// 获取指定路径节点 /// </summary> /// <param name="xPath"></param> /// <returns></returns> public static XmlNode GetXmlNode(string xmlFileName, string xPath) { XmlDocument xmldocument = new XmlDocument(); //加载xml文档 xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); return xmlnode; } catch { return null; } } /// <summary> /// 获取指定路径节点下孩子节点列表 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath"></param> /// <returns></returns> public static XmlNodeList GetXmlNodeList(string xmlFileName, string xPath) { XmlDocument xmldocument = new XmlDocument(); //加载xml文档 xmldocument.Load(xmlFileName); try { XmlNodeList xmlnodelist = xmldocument.SelectNodes(xPath); return xmlnodelist; } catch { return null; } } /// <summary> /// 获取指定路径节点的属性与指定属性名匹配 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath">要匹配的XPath表达式(例如:"//节点名//子节点名</param> /// <param name="attributeName">指定的属性名称</param> /// <returns></returns> public static XmlAttribute GetXmlAttribute(string xmlFileName, string xPath,string attributeName) { XmlAttribute xmlattribute=null; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { if (xmlnode.Attributes.Count > 0) { xmlattribute = xmlnode.Attributes[attributeName]; } } } catch (Exception err) { throw err; } return xmlattribute; } /// <summary> /// 获取指定节点的属性集合 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath"></param> /// <returns></returns> public static XmlAttributeCollection GetNodeAttributes(string xmlFileName, string xPath) { XmlAttributeCollection xmlattributes = null; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { if (xmlnode.Attributes.Count > 0) { xmlattributes = xmlnode.Attributes; } } } catch (Exception err) { throw err; } return xmlattributes; } /// <summary> /// 更新指定节点的某一属性设定其属性值value /// </summary> /// <param name="xmlFileName">xml文档路径</param> /// <param name="xPath"></param> /// <param name="attributeOldeName">旧属性名称</param> /// <param name="attributeNewName">新属性名称</param> /// <param name="value">属性值</param> /// <returns>成功返回true,失败返回false</returns> public static bool UpdateAttribute(string xmlFileName, string xPath, string attributeName, string value) { bool isSuccess = false; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { foreach (XmlAttribute attribute in xmlnode.Attributes) { if (attribute.Name.ToString().ToLower() == attributeName.ToLower()) { isSuccess = true; attribute.Value = value; xmldocument.Save(xmlFileName); break; } } } } catch(Exception err) { throw err; } return isSuccess; } /// <summary> /// 删除指定节点的所有属性 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath"></param> /// <returns>成功返回true,失败返回false</returns> public static bool DeleteAttributes(string xmlFileName, string xPath) { bool isSuccess = false; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { if (xmlnode.Attributes.Count > 0) { xmlnode.Attributes.RemoveAll(); xmldocument.Save(xmlFileName); isSuccess = true; } } } catch (Exception err) { throw err; } return isSuccess; } /// <summary> /// 删除匹配属性名称的指定节点的属性 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath"></param> /// <param name="attributeName"></param> /// <returns></returns> public static bool DeleteOneAttribute(string xmlFileName, string xPath, string attributeName) { bool isSuccess = false; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); XmlAttribute xmlAttribute = null; try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { if (xmlnode.Attributes.Count > 0) { foreach (XmlAttribute attribute in xmlnode.Attributes) { if (attribute.Name.ToLower() == attributeName.ToLower()) { xmlAttribute = attribute; break; } } } if (xmlAttribute != null) { xmlnode.Attributes.Remove(xmlAttribute); xmldocument.Save(xmlFileName); isSuccess = true; } } } catch (Exception err) { throw err; } return isSuccess; } /// <summary> /// 创建指定节点的属性,如果属性存在则不创建 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath"></param> /// <param name="attributeName"></param> /// <param name="value"></param> /// <returns></returns> public static bool AddAttribute(string xmlFileName, string xPath,string attributeName,string value) { bool isSuccess = false; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { if (xmlnode.Attributes.Count > 0)//遍历判断有无此属性 { foreach (XmlAttribute attribute in xmlnode.Attributes) { if (attribute.Name.ToLower() == attributeName.ToLower()) { //有则不改，直接返回true; return true; } } } XmlAttribute xmlAttribute = xmldocument.CreateAttribute(attributeName); xmlAttribute.Value = value; xmlnode.Attributes.Append(xmlAttribute); xmldocument.Save(xmlFileName); isSuccess = true; } } catch (Exception err) { throw err; } return isSuccess; } /// <summary> /// 为某一指定路径节点下添加新的节点，如果该节点存在，则不添加 /// </summary> /// <param name="xmlFileName">xml文档路径</param> /// <param name="xPath">需要添加节点的路径</param> /// <param name="nodeName">节点名称</param> /// <param name="innerText">节点文本值</param> /// <returns>成功返回true,存在返回false</returns> public static bool AddNode(string xmlFileName, string xPath, string nodeName, string innerText) { bool isSuccess = false; bool isExisitNode = false; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { isExisitNode = true; } if (!isExisitNode) { XmlElement subElement = xmldocument.CreateElement(nodeName); subElement.InnerText = innerText; xmlnode.AppendChild(subElement); isSuccess = true; xmldocument.Save(xmlFileName); } } catch (Exception err) { throw err; } return isSuccess; } /// <summary> /// 查找指定的节点，更新其节点值 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath"></param> /// <param name="nodeName"></param> /// <param name="innerText"></param> /// <returns></returns> public static bool UpdateNode(string xmlFileName, string xPath, string nodeName, string innerText) { bool isSuccess = false; bool isExisitNode = false; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); try { if (xmlnode != null) { isExisitNode = true; } if (!isExisitNode) { xmlnode.InnerText = innerText; isSuccess = true; xmldocument.Save(xmlFileName); } } catch (Exception err) { throw err; } return isSuccess; } /// <summary> /// 删除指定节点名称为nodeName的所有节点，如果该节点有子节点，则不能删除 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath"></param> /// <param name="nodeName"></param> /// <returns></returns> public static bool deleteNode(string xmlFileName, string xPath, string nodeName) { bool isSuccess = false; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { if (xmlnode.HasChildNodes) { isSuccess = false; } else { xmlnode.ParentNode.RemoveChild(xmlnode);//删除节点 isSuccess = true; xmldocument.Save(xmlFileName); } } } catch (Exception err) { throw err; } return isSuccess; } /// <summary> /// 根据指定节点名称更新其下指定的子节点的值 /// </summary> /// <param name="xmlFileName"></param> /// <param name="xPath"></param> /// <param name="nodeName"></param> /// <param name="innerText"></param> /// <returns></returns> public static bool UpdateChildNode(string xmlFileName, string xPath, string nodeName,string childName, string innerText) { bool isSuccess = false; XmlDocument xmldocument = new XmlDocument(); xmldocument.Load(xmlFileName); try { XmlNode xmlnode = xmldocument.SelectSingleNode(xPath); if (xmlnode != null) { foreach (XmlNode node in xmlnode.ChildNodes) { if (node.Name.ToLower() == childName.ToLower()) { node.InnerText = innerText; xmldocument.Save(xmlFileName); isSuccess = true; } } } } catch (Exception err) { throw err; } return isSuccess; } #region 创建XML的根节点 /// <summary> /// 创建XML的根节点 /// </summary> private void CreateXMLElement() { //创建一个XML对象 _xml = new XmlDocument(); if (File.Exists(_FilePath)) { //加载XML文件 _xml.Load(this._FilePath); } //为XML的根节点赋值 _element = _xml.DocumentElement; } #endregion #region 保存XML文件 /// <summary> /// 保存XML文件 /// </summary> public void Save() { //创建XML的根节点 //CreateXMLElement(); //保存XML文件 _xml.Save(this._FilePath); } #endregion //保存XML文件 #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; } #endregion } }