使用XDocument类创建和读取XML文件

前台：<asp:Label ID="lblXml" runat="server" Text=""></asp:Label>

后台：

//请添加以下两个命名空间
using System.Xml.Linq;
using System.Text;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        WriteXML();
        ReadXML();
    }

    private void WriteXML()         //创建一个XML文件
    {
        XDocument doc = new XDocument(
            new XDeclaration("1.0", "utf-8", "yes"),//创建版本<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
            new XComment("Created:" + DateTime.Now.ToString()),//创建注释节点
            new XElement("DvdList",                              //创建元素
                new XElement("DVD",
                    new XAttribute("ID", "1"),                  //创建属性（特性）

                    new XAttribute("Category", "Secience Fiction"),
                    new XElement("Title", "The Matrix"),
                    new XElement("Director", "Larry Wachowski"),
                    new XElement("Price", "12.2"),
                    new XComment("dfdfdddddddddddddddddddddddddddddddd"),
                    new XElement("starring",
                        new XElement("star", "Keanu Reeves"),
                        new XElement("star", "Laurence fishburne")
                        )
                    ),
                new XElement("DVD",
                    new XAttribute("ID", "2"),
                    new XAttribute("Category", "Drama"),
                    new XElement("Title", "Forrest Gump"),
                    new XElement("Director", "Robert zemeckis"),
                    new XElement("Price", "23.3"),
                    new XElement("Starring",
                        new XElement("star", "sb"),
                        new XElement("star", "aaa")
                        )
                    )
                )
            );
        doc.Save(Server.MapPath("DvdList.xml"));  //保存为DvdList.xml
    }
    private void ReadXML()                      //读取上面创建的XML文件DvdList.xml
    {
        string xmlFile = Server.MapPath("DvdList.xml"); //获取XML文件的路径
        XDocument doc = XDocument.Load(xmlFile);           //读取计算机内在中

        StringBuilder sb = new StringBuilder();
        foreach (XElement element in doc.Element("DvdList").Elements())
        {
            sb.Append("<ul><b>");
            sb.Append((string)element.Element("Title"));
            sb.Append("</b><li>");
            sb.Append((string)element.Element("Director"));
            sb.Append("</li><li>");
            sb.Append(String.Format("{0:c}", (Decimal)element.Element("Price")));
            sb.Append("</li></ul>");
        }
        lblXml.Text = sb.ToString();
    }
}