ASP.NET对XML文件的基本操作

XML文件格式&＃xff1a;





 

    1

   

北京

 

 

    2

   

昆明

 





ASP.NET对XML文件的基本操作&＃xff1a;

加载&＃xff1a;

        XmlDocument xmlDoc &＃61; new XmlDocument();

        xmlDoc.Load(Server.MapPath("user.xml"));



插入&＃xff1a;

        XmlNode xmldocSelect &＃61; xmlDoc.SelectSingleNode("user");

        XmlElement el &＃61; 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 &＃61; xmlDoc.CreateElement("pass"); //添加person节点的里的节点

        xesub1.InnerText &＃61; "123";//设置文本节点

        el.AppendChild(xesub1);

        XmlElement xesub2 &＃61; xmlDoc.CreateElement("Address");

        xesub2.InnerText &＃61; "昆明";//设置文本节点

        el.AppendChild(xesub2);

        xmldocSelect.AppendChild(el);

        xmlDoc.Save(Server.MapPath("user.xml"));



修改&＃xff1a;

        XmlNodeList nodeList &＃61; 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 &＃61; (XmlElement)xn;//将子节点类型转换为XmlElement类型

            if (xe.GetAttribute("name") &＃61;&＃61; "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 &＃61; 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 &＃61; (XmlElement)xn1;//转换类型

                    if (xe2.Name &＃61;&＃61; "pass")//如果找到

                    {

                        xe2.InnerText &＃61; "66666";//则修改

                        break;

                    }

                }

                break;

            }

        }

        xmlDoc.Save(Server.MapPath("user.xml"));//保存



删除&＃xff1a;

        XmlNodeList xnl &＃61; xmlDoc.SelectSingleNode("user").ChildNodes;

        foreach (XmlNode xn in xnl)

        {

            XmlElement xe &＃61; (XmlElement)xn;

            if (xe.GetAttribute("name") &＃61;&＃61; "发明")

            {

                //xe.RemoveAttribute("name");//删除name属性

                // xe.RemoveAll();//删除该节点的全部内容

                xe.ParentNode.RemoveChild(xe);

                break;

            }

        }

        xmlDoc.Save(Server.MapPath("user.xml"));//保存



读取&＃xff1a;

        XmlNode xn &＃61; xmlDoc.SelectSingleNode("user");

        XmlNodeList xnl &＃61; xn.ChildNodes;

        foreach (XmlNode xnf in xnl)

        {

            XmlElement xe &＃61; (XmlElement)xnf;

            Response.Write(xe.GetAttribute("name"));//显示属性值

            Response.Write(xe.GetAttribute("sex"));



            XmlNodeList xnf1 &＃61; xe.ChildNodes;

            foreach (XmlNode xn2 in xnf1)

            {

                Response.Write(xn2.InnerText);//显示子节点点文本

            }

        }