C#中对XML文件的一些基本操作

//定义XMLDocument
            XmlDocument xmlDocument = new XmlDocument();
            //定义XML文档头文件
            XmlDeclaration xmlDeclaration = xmlDocument.CreateXmlDeclaration("1.0","utf-8",null);
            //增加XML文档头
            xmlDocument.AppendChild(xmlDeclaration);
            //定义XML的根
            XmlElement xmlRoot = xmlDocument.CreateElement("userdata");
            //添加根的属性
            xmlRoot.SetAttribute("createuser","true");
            //修改根属性的值
            xmlRoot.GetAttributeNode("createuser").Value = "false";
            //添加子节点并设置子节点属性
            xmlDocument.AppendChild(xmlRoot);
            XmlElement dataconnection = xmlDocument.CreateElement("dataconnection");
            XmlElement server = xmlDocument.CreateElement("server");
            server.InnerText = "localhost";
            XmlElement uid = xmlDocument.CreateElement("uid");
            uid.InnerText = "sa";
            XmlElement pwd = xmlDocument.CreateElement("pwd");
            xmlRoot.AppendChild(dataconnection);
            dataconnection.AppendChild(server);
            dataconnection.AppendChild(uid);
            dataconnection.AppendChild(pwd);
            //保存XML文档
            xmlDocument.Save("book.xml");
            //读取子节点server的值
            XmlNode xnserver = xmlDocument.SelectSingleNode("userdata/dataconnection/server");
            Console.WriteLine("node server's value is "+ xnserver.InnerText);
            Console.ReadLine();

生成的XML代码如下:

<?xml version="1.0" encoding="utf-8"?>
<userdata createuser="false">
  <dataConnection>
    <server>localhost</server>
    <uid>sa</uid>
    <pwd />
  </dataConnection>
</userdata>