Xml操作

using System; using System.Xml; using System.Collections.Generic; using System.Text; namespace janyo.io { public class XmlUtility { private static string xmlfilename=""; public static string XmlFileName { set { xmlfilename=value; } } private void loadXmlDoc() { //XmlDocument xdoc = new XmlDocument(); //xdoc.Load(xmlfilename); } private static string getFileName() { return ""; } /// <summary> /// 读取节点的值 /// </summary> /// <param name="node">节点名称</param> /// <returns></returns> public static string getValueByNode(string node) { string temp =""; XmlTextReader xrd =new XmlTextReader(xmlfilename); while (xrd.Read()) { if (xrd.NodeType==XmlNodeType.Element) { if (xrd.Name==node) { temp=xrd.ReadElementContentAsString(); return temp; } } } xrd.Close(); return ""; } /// <summary> /// 查找某个所有匹配条件的节点值 /// </summary> /// <param name="xpath">节点xpath表达式;/siteconfig/item[@id=var]</param> /// <returns></returns> public static System.Collections.ArrayList getItems(string xpath) { XmlDocument xmldoc = new XmlDocument(); xmldoc.Load(xmlfilename); XmlNodeList xnodelist = xmldoc.SelectNodes(xpath); System.Collections.ArrayList arr = new System.Collections.ArrayList(); if (xnodelist.Count==0) { return null; } foreach (XmlNode xnod in xnodelist) { arr.Add(xnod.InnerText); } xmldoc = null; return arr; } /// <summary> /// 读取某个节点的属性值 /// </summary> /// <param name="node">节点名称</param> /// <param name="attrs">属性,可以读写该节点多个属性</param> /// <returns></returns> public static System.Collections.ArrayList getValueByNode(string node,params string[] attrs) { XmlReader xrd = XmlReader.Create(xmlfilename); while (xrd.Read()) { if (xrd.NodeType == XmlNodeType.Element) { if(xrd.Name==node) { //string[] temp=null; System.Collections.ArrayList arlist = new System.Collections.ArrayList(); // int i =0; foreach (string attr in attrs) { arlist.Add(xrd.GetAttribute(attr)); // i++; } return arlist; } } } xrd.Close(); return null; } /// <summary> /// 删除某个节点 /// </summary> /// <param name="xpath">节点xpath表达式;/siteconfig/item[@id=var]</param> public static void deletNode(string xpath) { XmlDocument xmldoc = new XmlDocument(); xmldoc.Load(xmlfilename); XmlNode xnod=xmldoc.SelectSingleNode(xpath); xnod.ParentNode.RemoveChild(xnod); xmldoc.Save(xmlfilename); } /// <summary> /// 更新某个节点的值 /// </summary> /// <param name="xpath">节点xpath表达式;/siteconfig/item[@id=var]</param> /// <param name="value">更新值<node></node></param> public static void updateNode(string xpath, string value) { XmlDocument xmldoc = new XmlDocument(); xmldoc.Load(xmlfilename); XmlNode xnod = xmldoc.SelectSingleNode(xpath); xnod.InnerText = value; xmldoc.Save(xmlfilename); xmldoc = null; } /// <summary> /// 批量更新节点屬性的值 /// </summary> /// <param name="xpath">节点xpath表达式;/siteconfig/item[@id=var]</param> /// <param name="attrs">屬性名稱值對<node></node></param> public static void updateNode(string xpath, string[] attrs) { XmlDocument xmldoc = new XmlDocument(); xmldoc.Load(xmlfilename); XmlNodeList xnodlist = xmldoc.SelectNodes(xpath); foreach (XmlNode xnod in xnodlist) { xnod.Attributes[attrs[0]].Value=attrs[1]; } // xnod.InnerText = value; xmldoc.Save(xmlfilename); xmldoc = null; } /// <summary> /// 在指定节点插入子节点 /// </summary> /// <param name="xpath">节点xpath表达式;/siteconfig/item[@id=var]</param> /// <param name="value">节点值<node></node></param> /// <param name="cNode">待插入的节点</param> public static void insertNode(string xpath, string cNode,string value,params string[] attrs) { XmlDocument xmldoc = new XmlDocument(); xmldoc.Load(xmlfilename); XmlNode xnod = xmldoc.SelectSingleNode(xpath); XmlElement xn = xmldoc.CreateElement(cNode); int attrsLength = attrs.GetUpperBound(0)+1; if (attrsLength%2!=0) { throw new Exception("屬性名稱值對不相等"); } for (int i = 0; i <attrs.GetUpperBound(0)+1; i++) { xn.SetAttribute(attrs[i], attrs[i+1]); i++; } xnod.AppendChild(xn); xnod.LastChild.InnerText=value; xmldoc.Save(xmlfilename); xmldoc = null; } } }