.net读写xml

XML文件

<?xml version="1.0" encoding="utf-8"?>
<book>
  <title>webapi入门</title>
  <author>李白</author>
  <price>100</price>
</book>

读XML

XmlDocument xdoc = new XmlDocument();
        xdoc.Load(Server.MapPath("/App_Data/data.xml"));
        XmlElement root = xdoc.DocumentElement;   //获取根节点  
        Response.Write(root.GetElementsByTagName("price")[0].InnerText);

写XML

XmlDocument xdoc = new XmlDocument();
        xdoc.Load(Server.MapPath("/App_Data/data.xml"));
        XmlElement root = xdoc.DocumentElement;   //获取根节点  
        root.GetElementsByTagName("price")[0].InnerText = "200";
        xdoc.Save(Server.MapPath("/App_Data/data.xml"));