OpenXml开发-一个应用Xml的例子

  3private XmlDocument xmlDoc;
  4        //load xml file
  5        private void LoadXml()
  6        {
  7            xmlDoc=new XmlDocument();
  8            xmlDoc.Load("User.xml");
  9        }
 10        //添加节点
 11        private void AddElement()
 12        {             
 13            LoadXml();
 14            XmlNode xmldocSelect=xmlDoc.SelectSingleNode("user");             
 15            XmlElement el=xmlDoc.CreateElement("person"); //添加person节点
 16            el.SetAttribute("name","风云"); //添加person节点的属性"name"
 17            el.SetAttribute("sex","女");   //添加person节点的属性 "sex"
 18            el.SetAttribute("age","25");   //添加person节点的属性 "age"             
 19             XmlElement xesub1=xmlDoc.CreateElement("pass"); //添加person节点的里的节点
 20             xesub1.InnerText="123";//设置文本节点
 21             el.AppendChild(xesub1);
 22             XmlElement xesub2=xmlDoc.CreateElement("Address");
 23             xesub2.InnerText="昆明";//设置文本节点
 24             el.AppendChild(xesub2);
 25            xmldocSelect.AppendChild(el);
 26            xmlDoc.Save(Server.MapPath("user.xml"));
 27        }      
 28        //修改节点
 29        private void UpdateElement()
 30        {
 31            LoadXml();
 32            XmlNodeList nodeList=xmlDoc.SelectSingleNode("user").ChildNodes;//获取bookstore节点的所有子节点
 33            foreach(XmlNode xn in nodeList)//遍历所有子节点
 34            {
 35                XmlElement xe=(XmlElement)xn;//将子节点类型转换为XmlElement类型
 36                if(xe.GetAttribute("name")=="风云")//如果name属性值为“风云”
 37                {
 38                    xe.SetAttribute("name","发明");                     
 39                    //如果下面有子节点在下走
 40                     XmlNodeList nls=xe.ChildNodes;//继续获取xe子节点的所有子节点
 41                    foreach(XmlNode xn1 in nls)//遍历
 42                    {
 43                       XmlElement xe2=(XmlElement)xn1;//转换类型
 44                        if(xe2.Name=="pass")//如果找到
 45                        {
 46                            xe2.InnerText="66666";//则修改
 47                            break;
 48                        }
 49                    }
 50                    break;
 51                }
 52            }
 53           xmlDoc.Save(Server.MapPath("user.xml"));//保存
 54        }
 55        //删出节点
 56        private void deleteNode()
 57        {            
 58            LoadXml();
 59            XmlNodeList xnl=xmlDoc.SelectSingleNode("user").ChildNodes;
 60            foreach(XmlNode xn in xnl)
 61            {
 62                XmlElement xe=(XmlElement)xn;                 
 63                if(xe.GetAttribute("name")=="发明")
 64                {
 65                    //xe.RemoveAttribute("name");//删除name属性
 66                    xe.RemoveAll();//删除该节点的全部内容                     
 67                    break;
 68                }                 
 69            }
 70            xmlDoc.Save(Server.MapPath("user.xml"));//保存
 71        }
 72
 73        private void showIt()
 74        {
 75            LoadXml();
 76            XmlNode xn=xmlDoc.SelectSingleNode("user");
 77            XmlNodeList xnl=xn.ChildNodes;    
 78            foreach(XmlNode xnf in xnl)
 79            {
 80                  XmlElement xe=(XmlElement)xnf;
 81//                Console.WriteLine(xe.GetAttribute("name"));//显示属性值
 82//                Console.WriteLine(xe.GetAttribute("sex")); //
 83//                XmlNodeList xnf1=xe.ChildNodes;
 84//                foreach(XmlNode xn2 in xnf1)
 85//                {
 86//                    Console.WriteLine(xn2.InnerText);//显示子节点点文本
 87//                }
 88            }
 89        }
 90    
 91Xml的样式:
 92<?xml version="1.0" encoding="gb2312"?>
 93<user>
 94<person>
 95</person>
 96<person name="风拉" sex="男" age="25">
 97    <pass>123</pass>
 98    <Address>大明</Address>
 99</person>
100<person name="风云" sex="女" age="25">
101    <pass>123</pass>
102    <Address>昆明</Address>
103</person>
104</user>