xml xslt linqxml

1. 常规写法

 // 创建一个XmlDocument对象，用于载入存储信息的XML文件
            XmlDocument xdoc = new XmlDocument();
            xdoc.Load(Server.MapPath("guestbook.xml"));

            // 创建一个新的guest节点并将它添加到根节点下
            XmlElement parentNode = xdoc.CreateElement("guest");
            xdoc.DocumentElement.PrependChild(parentNode);
          
            // 创建所有用于存储信息的节点
            XmlElement namenode = xdoc.CreateElement("name");
            XmlElement emailNode = xdoc.CreateElement("email");
            XmlElement qqNode = xdoc.CreateElement("qq");
            XmlElement homepageNode = xdoc.CreateElement("homepage");
            XmlElement commentNode = xdoc.CreateElement("comment");

            // 获取文本信息
            XmlText nameText  = xdoc.CreateTextNode(TextBox1.Text);
            XmlText emailText = xdoc.CreateTextNode(TextBox2.Text);
            XmlText qqText = xdoc.CreateTextNode(TextBox3.Text);
            XmlText homepageText = xdoc.CreateTextNode(TextBox4.Text);
            XmlText commentText = xdoc.CreateTextNode(TextBox5.Text);

            // 将上面创建的各个存储信息的节点添加到guest节点下但并不包含最终的值
            parentNode.AppendChild(namenode);
            parentNode.AppendChild(emailNode);
            parentNode.AppendChild(qqNode);
            parentNode.AppendChild(homepageNode);
            parentNode.AppendChild(commentNode);

            // 将上面获取的文本信息添加到与之相对应的节点中
            namenode.AppendChild(nameText);
            emailNode.AppendChild(emailText);
            qqNode.AppendChild(qqText);
            homepageNode.AppendChild(homepageText);
            commentNode.AppendChild(commentText);

            xdoc.Save(Server.MapPath("guestbook.xml"));

xslt转换
            Xml1.DocumentSource = Server.MapPath("guestbook.xml");
            Xml1.TransformSource = Server.MapPath("guestBook.xslt");

绑定gridview 
              DataSet ds = new DataSet();
            ds.ReadXml(Server.MapPath("guestbook.xml"));
            this.GridView1.DataSource = ds.Tables[0].DefaultView;
            this.GridView1.DataBind();

下载文件  guestbookxml 和xslt文件格式

2. linq 

   XDocument xdoc = XDocument.Load(Server.MapPath("guestbook.xml"));//var
            var zz = from p in xdoc.Elements("guestbook").Elements("guest")
                     where  (p.Attribute("style")== null)||(p.Attribute("style").Value!="display")
                     select new { name = p.Element("name").Value, emali = p.Element("email").Value, qq = p.Element("qq").Value };
            GridView1.DataSource = zz;
            GridView1.DataBind();
创建
XDocument xdoc = new XDocument(
                new XDeclaration("1.0", "utf-8", null),
                new XElement("guestbook",
                    new XElement("guest",
                        new XElement("name", "jack"),
                        new XElement("age", "20")),
                    new XElement("guest",
                        new XElement("name", "tom"),
                        new XElement("age", "15"))
                        ));
            xdoc.Save(Server.MapPath("aa.xml"));
查找
  var aa = from a in xdoc.Descendants("name")
                     where a.Value == "jack"
                     select a;
            foreach (var aaa in aa)
            {
                Response.Write(aaa);
            }