前言
该篇文章主要总结的是自己平时工作中使用频率比较高的Xml文档操作的一些常用方法和收集网上写的比较好的一些通用Xml文档操作的方法（主要包括Xml序列化和反序列化，Xml文件读取，Xml文档节点内容增删改的一些通过方法）。当然可能还有很多方法会漏了，假如各位同学好的方法可以在文末留言，我会统一收集起来。
C#XML基础入门
Xml反序列化为对象
#region Xml反序列化为对象 /// <summary> /// Xml反序列化为指定模型对象 /// </summary> /// <typeparam name="T">对象类型</typeparam> /// <param name="xmlContent">Xml内容</param> /// <param name="isThrowException">是否抛出异常</param> /// <returns></returns> public static T XmlConvertToModel<T>(string xmlContent, bool isThrowException = false) where T : class { StringReader stringReader = null; try { XmlSerializer xmlSerializer = new XmlSerializer(typeof(T)); stringReader = new StringReader(xmlContent); return (T)xmlSerializer.Deserialize(stringReader); } catch (Exception ex) { if (isThrowException) { throw ex; } return null; } finally { stringReader?.Dispose(); } } /// <summary> /// 读取Xml文件内容反序列化为指定的对象 /// </summary> /// <param name="filePath">Xml文件的位置（绝对路径）</param> /// <returns></returns> public static T DeserializeFromXml<T>(string filePath) { try { if (!File.Exists(filePath)) throw new ArgumentNullException(filePath + " not Exists"); using (StreamReader reader = new StreamReader(filePath)) { XmlSerializer xs = new XmlSerializer(typeof(T)); T ret = (T)xs.Deserialize(reader); return ret; } } catch (Exception ex) { return default(T); } } #endregion
对象序列化为Xml
#region 对象序列化为Xml /// <summary> /// 对象序列化为Xml /// </summary> /// <param name="obj">对象</param> /// <param name="isThrowException">是否抛出异常</param> /// <returns></returns> public static string ObjectSerializerXml<T>(T obj, bool isThrowException = false) { if (obj == null) { return string.Empty; } try { using (StringWriter sw = new StringWriter()) { Type t = obj.GetType(); //强制指定命名空间，覆盖默认的命名空间 XmlSerializerNamespaces namespaces = new XmlSerializerNamespaces(); //在Xml序列化时去除默认命名空间xmlns:xsd和xmlns:xsi namespaces.Add(string.Empty, string.Empty); XmlSerializer serializer = new XmlSerializer(obj.GetType()); //序列化时增加namespaces serializer.Serialize(sw, obj, namespaces); sw.Close(); string replaceStr = sw.ToString().Replace(@"<?xml version=""1.0"" encoding=""utf-16""?>", ""); return replaceStr; } } catch (Exception ex) { if (isThrowException) { throw ex; } return string.Empty; } } #endregion
Xml字符处理
#region Xml字符处理 /// <summary> /// 特殊符号转换为转义字符 /// </summary> /// <param name="xmlStr"></param> /// <returns></returns> public string XmlSpecialSymbolConvert(string xmlStr) { return xmlStr.Replace("&", "&").Replace("<", "<").Replace(">", ">").Replace("\'", "'").Replace("\"", """); } #endregion
创建Xml文档
#region 创建Xml文档 /// <summary> /// 创建Xml文档 /// </summary> /// <param name="saveFilePath">文件保存位置</param> public void CreateXmlDocument(string saveFilePath) { XmlDocument xmlDoc = new XmlDocument(); //创建类型声明节点 XmlNode node = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", ""); xmlDoc.AppendChild(node); //创建Xml根节点 XmlNode root = xmlDoc.CreateElement("books"); xmlDoc.AppendChild(root); XmlNode root1 = xmlDoc.CreateElement("book"); root.AppendChild(root1); //创建子节点 CreateNode(xmlDoc, root1, "author", "追逐时光者"); CreateNode(xmlDoc, root1, "title", "XML学习教程"); CreateNode(xmlDoc, root1, "publisher", "时光出版社"); //将文件保存到指定位置 xmlDoc.Save(saveFilePath/*"D://xmlSampleCreateFile.xml"*/); } /// <summary> /// 创建节点 /// </summary> /// <param name="xmlDoc">xml文档</param> /// <param name="parentNode">Xml父节点</param> /// <param name="name">节点名</param> /// <param name="value">节点值</param> /// public void CreateNode(XmlDocument xmlDoc, XmlNode parentNode, string name, string value) { //创建对应Xml节点元素 XmlNode node = xmlDoc.CreateNode(XmlNodeType.Element, name, null); node.InnerText = value; parentNode.AppendChild(node); } #endregion
Xml数据读取
#region Xml数据读取 /// <summary> /// 读取Xml指定节点中的数据 /// </summary> /// <param name="filePath">Xml文档路径</param> /// <param name="node">节点</param> /// <param name="attribute">读取数据的属性名</param> /// <returns>string</returns> /************************************************** * 使用示列: * XmlHelper.XmlReadNodeAttributeValue(path, "/books/book", "author") ************************************************/ public static string XmlReadNodeAttributeValue(string filePath, string node, string attribute) { string value = ""; try { XmlDocument doc = new XmlDocument(); doc.Load(filePath); XmlNode xmlNode = doc.SelectSingleNode(node); value = (attribute.Equals("") ? xmlNode.InnerText : xmlNode.Attributes[attribute].Value); } catch { } return value; } /// <summary> /// 获得xml文件中指定节点的节点数据 /// </summary> /// <param name="filePath">Xml文档路径</param> /// <param name="nodeName">节点名</param> /// <returns></returns> public static string GetNodeInfoByNodeName(string filePath, string nodeName) { string XmlString = string.Empty; XmlDocument xml = new XmlDocument(); xml.Load(filePath); XmlElement root = xml.DocumentElement; XmlNode node = root.SelectSingleNode("//" + nodeName); if (node != null) { XmlString = node.InnerText; } return XmlString; } /// <summary> /// 获取某一节点的所有孩子节点的值 /// </summary> /// <param name="node">要查询的节点</param> /// <param name="filePath">Xml文档路径</param> public string[] ReadAllChildallValue(string node, string filePath) { int i = 0; string[] str = { }; XmlDocument doc = new XmlDocument(); doc.Load(filePath); XmlNode xn = doc.SelectSingleNode(node); XmlNodeList nodelist = xn.ChildNodes; //得到该节点的子节点 if (nodelist.Count > 0) { str = new string[nodelist.Count]; foreach (XmlElement el in nodelist)//读元素值 { str[i] = el.Value; i++; } } return str; } /// <summary> /// 获取某一节点的所有孩子节点的值 /// </summary> /// <param name="node">要查询的节点</param> /// <param name="filePath">Xml文档路径</param> public XmlNodeList ReadAllChild(string node, string filePath) { XmlDocument doc = new XmlDocument(); doc.Load(filePath); XmlNode xn = doc.SelectSingleNode(node); XmlNodeList nodelist = xn.ChildNodes; //得到该节点的子节点 return nodelist; } #endregion
Xml插入数据
#region Xml插入数据 /// <summary> /// Xml指定节点元素属性插入数据 /// </summary> /// <param name="path">路径</param> /// <param name="node">节点</param> /// <param name="element">元素名</param> /// <param name="attribute">属性名</param> /// <param name="value">属性数据</param> /// <returns></returns> /************************************************** * 使用示列: * XmlHelper.XmlInsertValue(path, "/books", "book", "author", "Value") ************************************************/ public static void XmlInsertValue(string path, string node, string element, string attribute, string value) { try { XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNode xmlNode = doc.SelectSingleNode(node); if (element.Equals("")) { if (!attribute.Equals("")) { XmlElement xe = (XmlElement)xmlNode; xe.SetAttribute(attribute, value); } } else { XmlElement xe = doc.CreateElement(element); if (attribute.Equals("")) xe.InnerText = value; else xe.SetAttribute(attribute, value); //添加新增的节点 xmlNode.AppendChild(xe); } //保存Xml文档 doc.Save(path); } catch { } } #endregion
Xml修改数据
#region Xml修改数据 /// <summary> /// Xml指定节点元素属性修改数据 /// </summary> /// <param name="path">路径</param> /// <param name="node">节点</param> /// <param name="attribute">属性名</param> /// <param name="value">属性数据</param> /// <returns></returns> /************************************************** * 使用示列: * XmlHelper.XmlUpdateValue(path, "/books", "book","author","Value") ************************************************/ public static void XmlUpdateValue(string path, string node, string attribute, string value) { try { XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNode xmlNode = doc.SelectSingleNode(node); XmlElement xmlElement = (XmlElement)xmlNode; if (attribute.Equals("")) xmlElement.InnerText = value; else xmlElement.SetAttribute(attribute, value); //保存Xml文档 doc.Save(path); } catch { } } #endregion
Xml删除数据
#region Xml删除数据 /// <summary> /// 删除数据 /// </summary> /// <param name="path">路径</param> /// <param name="node">节点</param> /// <param name="attribute">属性名</param> /// <returns></returns> /************************************************** * 使用示列: * XmlHelper.XmlDelete(path, "/books", "book") ************************************************/ public static void XmlDelete(string path, string node, string attribute) { try { XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNode xn = doc.SelectSingleNode(node); XmlElement xe = (XmlElement)xn; if (attribute.Equals("")) xn.ParentNode.RemoveChild(xn); else xe.RemoveAttribute(attribute); doc.Save(path); } catch { } } #endregion
