本文实例讲述了基于C#实现XML文件读取工具类。分享给大家供大家参考。具体如下：

这是我去年写的一个XML文件读取工具类，现在做了一些调整

基本能满足一般的XML文件读取需求。

更新：

2013年6月26日19:37 Fix了几个Bug，为所有方法添加单元测试，并运行通过；同时调整了几个方法的位置。

/// <summary> /// Author: jiangxiaoqiang /// </summary> public class XmlReader { //========================================================= // #region 获取XmlDocument对象 /// <summary> /// 根据XML文件内容获取XmlDocument对象 /// </summary> /// <param name="xmlFileContent"></param> /// <returns></returns> public static XmlDocument GetXmlDocByXmlContent(string xmlFileContent) { if (string.IsNullOrEmpty(xmlFileContent)) { return null; } var xDoc = new XmlDocument(); try { xDoc.LoadXml(xmlFileContent); } catch { xDoc = null; } return xDoc; } /// <summary> /// 根据XML文件路径获取XmlDocument对象 /// </summary> /// <param name="xmlFilePath"></param> /// <returns></returns> public static XmlDocument GetXmlDocByFilePath(string xmlFilePath) { if (string.IsNullOrEmpty(xmlFilePath) || !File.Exists(xmlFilePath)) { return null; } var xDoc = new XmlDocument(); try { xDoc.Load(xmlFilePath); } catch { throw new Exception(string.Format("请确认该XML文件格式正确，路径为：{0}", xmlFilePath)); } return xDoc; } #endregion //========================================================= // //========================================================= // #region 获取XML节点（或节点列表） /// <summary> /// 获取父节点下指定节点名称的第一个子节点 /// </summary> /// <param name="parentXmlNode"></param> /// <param name="childNodeName"></param> /// <returns></returns> public static XmlNode GetFirstChildNodeByName(XmlNode parentXmlNode, string childNodeName) { var childXmlNodes = GetChildNodesByName(parentXmlNode, childNodeName); if (childXmlNodes != null && childXmlNodes.Count > 0) { return childXmlNodes[0]; } return null; } /// <summary> /// 获取父节点下指定节点名称的子节点列表 /// </summary> /// <param name="parentXmlNode">父节点</param> /// <param name="nodeName">节点名称</param> /// <returns></returns> public static XmlNodeList GetChildNodesByName(XmlNode parentXmlNode, string nodeName) { if (parentXmlNode == null || string.IsNullOrEmpty(nodeName)) { return null; } return GetChildNodesByXPathExpr(parentXmlNode, string.Format(".//{0}", nodeName)); } /// <summary> /// 获取父节点下满足xpathExpr表达式的XML子节点列表 /// </summary> /// <param name="parentXmlNode">父节点</param> /// <param name="xpathExpr"></param> /// <returns></returns> public static XmlNodeList GetChildNodesByXPathExpr(XmlNode parentXmlNode, string xpathExpr) { if (parentXmlNode == null || string.IsNullOrEmpty(xpathExpr)) { return null; } return parentXmlNode.SelectNodes(xpathExpr); } /// <summary> /// 获取父节点下的第一个子节点 /// </summary> /// <param name="parentXmlNode"></param> /// <returns></returns> public static XmlNode GetFirstChildNode(XmlNode parentXmlNode) { var childXmlNodes = GetChildNodes(parentXmlNode); if (childXmlNodes != null && childXmlNodes.Count > 0) { return childXmlNodes[0]; } return null; } /// <summary> /// 获取父节点的子节点列表 /// </summary> /// <param name="parentXmlNode">父节点</param> /// <returns></returns> public static XmlNodeList GetChildNodes(XmlNode parentXmlNode) { return parentXmlNode == null ? null : parentXmlNode.ChildNodes; } #endregion //========================================================= // //========================================================= // #region 读取节点属性值 /// <summary> /// 读取某个XML节点的属性值（根据属性名） /// </summary> /// <param name="xmlNode"></param> /// <param name="attrName"></param> /// <returns></returns> public static string ReadAttrValue(XmlNode xmlNode, string attrName) { var xmlElement = xmlNode as XmlElement; return xmlElement == null ? null : xmlElement.GetAttribute(attrName); } /// <summary> /// 读取父节点下指定节点名和属性名的第一个子节点的属性值 /// </summary> /// <param name="parentXmlNode">XML父节点</param> /// <param name="childNodeName">节点名称</param> /// <param name="attrName">属性名</param> /// <returns></returns> public static string ReadFirstAttrValue(XmlNode parentXmlNode, string childNodeName, string attrName) { var attrVals = ReadAttrValues(parentXmlNode, childNodeName, attrName); return (attrVals == null || attrVals.Length == 0) ? null : attrVals[0]; } /// <summary> /// 读取父节点下指定节点名和属性名的所有子节点的该属性值的数组 /// </summary> /// <param name="parentXmlNode">XML文档</param> /// <param name="childNodeName">节点名称</param> /// <param name="attrName">属性名</param> /// <returns></returns> public static string[] ReadAttrValues(XmlNode parentXmlNode, string childNodeName, string attrName) { if (parentXmlNode == null || string.IsNullOrEmpty(childNodeName) || string.IsNullOrEmpty(attrName)) { return null; } var xpathExpr = string.Format("//{0}[@{1}]", childNodeName, attrName); var nodes = GetChildNodesByXPathExpr(parentXmlNode, xpathExpr); if (nodes != null && nodes.Count > 0) { var nodeCount = nodes.Count; var attrVals = new string[nodeCount]; for (var i = 0; i < nodeCount; i++) { attrVals[i] = ((XmlElement)nodes[i]).GetAttribute(attrName); } return attrVals; } return null; } #endregion //========================================================= // //========================================================= // #region 读取父节点下的子节点的文本内容 /// <summary> /// 读取父节点下指定节点名的第一个子节点的文本 /// </summary> /// <param name="parentXmlNode"></param> /// <param name="childNodeName"></param> /// <returns></returns> public static string ReadFirstChildNodeTextByName(XmlNode parentXmlNode, string childNodeName) { var childNodeTexts = ReadChildNodeTextsByName(parentXmlNode, childNodeName); if (childNodeTexts != null && childNodeTexts.Length > 0) { return childNodeTexts[0]; } return null; } /// <summary> /// 读取父节点下指定节点名的所有子节点的文本数组 /// </summary> /// <param name="parentXmlNode"></param> /// <param name="childNodeName"></param> /// <returns></returns> public static string[] ReadChildNodeTextsByName(XmlNode parentXmlNode, string childNodeName) { if (parentXmlNode == null || string.IsNullOrEmpty(childNodeName)) { return null; } var xpathExpr = string.Format(".//{0}", childNodeName); var childNodes = GetChildNodesByXPathExpr(parentXmlNode, xpathExpr); if (childNodes != null && childNodes.Count > 0) { var nodeCount = childNodes.Count; var nodeTexts = new string[nodeCount]; for (var i = 0; i < nodeCount; i++) { nodeTexts[i] = childNodes[i].InnerText; } return nodeTexts; } return null; } /// <summary> /// 读取父节点下的第一个子节点的文本 /// </summary> /// <param name="parentXmlNode"></param> /// <returns></returns> public static string ReadFirstChildNodeText(XmlNode parentXmlNode) { var childNodeTexts = ReadChildNodeTexts(parentXmlNode); if (childNodeTexts != null && childNodeTexts.Length > 0) { return childNodeTexts[0]; } return null; } /// <summary> /// 读取父节点下的所有子节点的文本数组 /// </summary> /// <param name="parentXmlNode"></param> /// <returns></returns> public static string[] ReadChildNodeTexts(XmlNode parentXmlNode) { if (parentXmlNode == null) { return null; } var childNodes = GetChildNodes(parentXmlNode); if (childNodes != null && childNodes.Count > 0) { var nodeCount = childNodes.Count; var nodeTexts = new string[nodeCount]; for (var i = 0; i < nodeCount; i++) { nodeTexts[i] = childNodes[i].InnerText; } return nodeTexts; } return null; } /// <summary> /// 读取XML节点文本 /// </summary> /// <param name="xmlNode"></param> /// <returns></returns> public static string ReadNodeText(XmlNode xmlNode) { if (xmlNode == null) { return null; } return xmlNode.InnerText; } #endregion //========================================================= // }

希望本文所述对大家的C#程序设计有所帮助。