asp.net对xml文件的读写,添加,修改,删除操作

 ???????????XmlDocument xdoc = new XmlDocument(); ???????????StringBuilder strb = new StringBuilder(); ???????????try ???????????{ ???????????????#region xml导出 ???????????????strb.Append("<?xml version=‘1.0‘ encoding=‘gb2312‘?>\n"); ???????????????strb.Append("<List>\n"); ???????????????//循环导出信息 ???????????????strb.Append("<report>\n"); ???????????????if (list != null) ???????????????{ ???????????????????for (int i = 0; i < list.Count; i++) ???????????????????{ ???????????????????????strb.Append("<" + list.GetKey(i) + ">" + list.GetByIndex(i) + "</" + list.GetKey(i) + ">"); ???????????????????} ???????????????} ???????????????strb.Append("<ischeck>0</ischeck>"); ???????????????strb.Append("</report>\n"); ???????????????strb.Append("</List>\n"); ???????????????#endregion ???????????????xdoc.LoadXml(strb.ToString()); ???????????????xdoc.Save(filePath); ???????????} ???????????catch (Exception ex) ???????????{ ???????????}Xml的样式:<?xml version="1.0" encoding="gb2312"?><List> ?<report> ???<btime>2016-09-01</btime> ???<checkPerson>他们</checkPerson> ???<etime>2016-09-30</etime> ???<reportMonth>201609</reportMonth> ???<txt11>1.54</txt11> ???<txt12>45.54</txt12> ???<txt21>5.54</txt21> ???<txt22>5.77</txt22> ???<txt31>7.08</txt31> ???<txt32>51.31</txt32> ???<writeDate>2018-01-15</writeDate> ???<writePerson>我们</writePerson> ???<ischeck>0</ischeck> ?</report></List>

using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using System.Xml;private XmlDocument xmlDoc; ????????//load xml file ???????private void LoadXml() ???????{ ???????????xmlDoc=new XmlDocument(); ???????????xmlDoc.Load(Server.MapPath("User.xml")); ???????} ????????//添加节点 ???????private void AddElement() ???????{ ????????????????????????LoadXml(); ????????????XmlNode xmldocSelect=xmlDoc.SelectSingleNode("user"); ????????????????????????XmlElement el=xmlDoc.CreateElement("person"); //添加person节点 ???????????el.SetAttribute("name","风云"); //添加person节点的属性"name" ???????????el.SetAttribute("sex","女"); ??//添加person节点的属性 "sex" ???????????el.SetAttribute("age","25"); ??//添加person节点的属性 "age" ?????????????????????????XmlElement xesub1=xmlDoc.CreateElement("pass"); //添加person节点的里的节点 ????????????xesub1.InnerText="123";//设置文本节点 ????????????el.AppendChild(xesub1); ????????????XmlElement xesub2=xmlDoc.CreateElement("Address"); ????????????xesub2.InnerText="昆明";//设置文本节点 ????????????el.AppendChild(xesub2); ????????????xmldocSelect.AppendChild(el); ???????????xmlDoc.Save(Server.MapPath("user.xml")); ???????} ????????//修改节点 ???????private void UpdateElement() ???????{ ???????????LoadXml(); ???????????XmlNodeList nodeList=xmlDoc.SelectSingleNode("user").ChildNodes;//获取bookstore节点的所有子节点 ???????????foreach(XmlNode xn in nodeList)//遍历所有子节点 ???????????{ ???????????????XmlElement xe=(XmlElement)xn;//将子节点类型转换为XmlElement类型 ???????????????if(xe.GetAttribute("name")=="风云")//如果name属性值为“风云” ???????????????{ ???????????????????xe.SetAttribute("name","发明"); ?????????????????????????????????????????//如果下面有子节点在下走 ????????????????????XmlNodeList nls=xe.ChildNodes;//继续获取xe子节点的所有子节点 ???????????????????foreach(XmlNode xn1 in nls)//遍历 ???????????????????{ ??????????????????????XmlElement xe2=(XmlElement)xn1;//转换类型 ???????????????????????if(xe2.Name=="pass")//如果找到 ???????????????????????{ ???????????????????????????xe2.InnerText="66666";//则修改 ???????????????????????????break; ???????????????????????} ???????????????????} ????????????????????break; ???????????????} ???????????} ??????????xmlDoc.Save(Server.MapPath("user.xml"));//保存 ???????} ?????????//删出节点 ???????private void deleteNode() ???????{ ????????????????????????LoadXml(); ???????????XmlNodeList xnl=xmlDoc.SelectSingleNode("user").ChildNodes; ?????????????foreach(XmlNode xn in xnl) ???????????{ ???????????????XmlElement xe=(XmlElement)xn; ????????????????????????????????if(xe.GetAttribute("name")=="发明") ???????????????{ ???????????????????//xe.RemoveAttribute("name");//删除name属性 ???????????????????xe.RemoveAll();//删除该节点的全部内容 ???????????????????break; ???????????????} ???????????} ???????????xmlDoc.Save(Server.MapPath("user.xml"));//保存 ???????} ????????private void showIt() ???????{ ???????????LoadXml(); ???????????XmlNode xn=xmlDoc.SelectSingleNode("user"); ?????????????XmlNodeList xnl=xn.ChildNodes; ???????????????foreach(XmlNode xnf in xnl) ???????????{ ???????????????XmlElement xe=(XmlElement)xnf;// ???????????????Console.WriteLine(xe.GetAttribute("name"));//显示属性值// ???????????????Console.WriteLine(xe.GetAttribute("sex"));// // ???????????????XmlNodeList xnf1=xe.ChildNodes;// ???????????????foreach(XmlNode xn2 in xnf1)// ???????????????{// ???????????????????Console.WriteLine(xn2.InnerText);//显示子节点点文本// ???????????????} ????????????} ????????} ????Xml的样式:<?xml version="1.0" encoding="gb2312"?><user> ?<person> ?</person> ?<person name="风拉" sex="男" age="25"> ???<pass>123</pass> ???<Address>大明</Address> ?</person> ?<person name="风云" sex="女" age="25"> ???<pass>123</pass> ???<Address>昆明</Address> ?</person></user>