在.NET 下读取.xml 文件的方法:

在.NET 下读取.xml 文件的方法:
1.利用 XmlTextReader 类,如:

XmlTextReader reader = new XmlTextReader(Server.MapPath(XmlPath));
   while(reader.Read())
   {
    if(reader.NodeType == XmlNodeType.Text )
    {
     Response.Write(reader.Name +"dd"+ reader.Value);
    }
   }

2,利用 XPathNavigator 类:

   XPathDocument xpdoc = new XPathDocument(Server.MapPath(XmlPath),XmlSpace.Preserve);
   XPathNavigator xpNav = xpdoc.CreateNavigator();

   XPathNodeIterator xpIter = xpNav.SelectDescendants("USERNAME",String.Empty,true);
   
   //Response.Write(xpIter.Current.Name + xpIter.Current.Value);

   while(xpIter.MoveNext())
   {
    if(xpIter.Current.Value == "c21")
        {}
   }

3,利用 XmlDocument 类:

   XmlDocument xdoc = new XmlDocument();
   xdoc.Load(Server.MapPath(XmlPath));

   XmlNamespaceManager mgr = new XmlNamespaceManager(xdoc.NameTable);
   mgr.AddNamespace("c21","http://52089.net");

   XmlNodeList xList =xdoc.SelectNodes("//USER",mgr);

   foreach(XmlNode node in xList)
   {
    if(node.ChildNodes[0].InnerText == "c21")
    {
        Response.Write("春天来了!");
    }
   }

4,利用 DataSet 类:

   DataSet dsUsers = new DataSet(); 
   dsUsers.ReadXmlSchema(pubPath +"\\UserInfo.xsd"); //如果有的话
   dsUsers.ReadXml(pubPath +"\\UserInfo.xml"); 必须有!
   有了DataSet对象后,什么都好办了,如:
    DataRow rowUser = dsUsers.Tables["User"].Rows.Find(userName);  //获得符合条件的数据行对象