winform如何解析这段XML

winform怎么解析这段XML
1<?xml version="1.0" encoding="gb2312" ?> 
2<function>
3<function_id>infolist</function_id> 
4<out_code>0</out_code> 
5<out_text>操作成功</out_text> 
6<rows>1802</rows> 
7<DrugInfoList>
8<row>
9<classCode>011405</classCode> 
10<drugType>1</drugType> 
11<drugCode>01140509</drugCode> 
12<drugCode2></drugCode2> 
13<useLevel>2</useLevel> 
14<drugName>硫普罗宁</drugName> 
15 。。。
16</row>
17<row>
18<classCode>011405</classCode> 
19<drugType>1</drugType> 
20<drugCode>01140510</drugCode> 
21<drugCode2></drugCode2> 
22<useLevel>2</useLevel> 
23<drugName>水飞蓟宾</drugName> 
24 。。。
25</row>
26</DrugInfoList>
27</function>


请问怎么解析这段XML

谢谢

[解决办法]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string xml = @"
                <function>
                 <function_id>infolist</function_id>  
                  <out_code>0</out_code>  
                  <out_text>操作成功</out_text>  
                  <rows>1802</rows>  
                   <DrugInfoList>
                    <row>
                     <classCode>011405</classCode>  
                     <drugType>1</drugType>  
                     <drugCode>01140509</drugCode>  
                     <drugCode2></drugCode2>   
 
                     <useLevel>2</useLevel>  
                    <drugName>硫普罗宁</drugName>
                   </row>
                   <row>
                    <classCode>011405</classCode>  
                    <drugType>1</drugType>  
                    <drugCode>01140510</drugCode>  
                    <drugCode2></drugCode2>  
                    <useLevel>2</useLevel>  
                    <drugName>水飞蓟宾</drugName>
                  </row>
                 </DrugInfoList>
                </function>
                ";
            XElement xe = XElement.Parse(xml);
            var out_code = xe.Element("out_code").Value;
            var out_text = xe.Element("out_text").Value;
            var drugNames = xe.Descendants("drugName").Select(x => x.Value);
            MessageBox.Show(out_code);
            MessageBox.Show(out_text);
            foreach (var i in drugNames)
            {
                MessageBox.Show(i);
            }
        }
    }
}

string xml = @"
                <function>
                 <function_id>infolist</function_id>  
                  <out_code>0</out_code>  
                  <out_text>操作成功</out_text>   
 
                  <rows>1802</rows>  
                   <DrugInfoList>
                    <row>
                     <classCode>011405</classCode>  
                     <drugType>1</drugType>  
                     <drugCode>01140509</drugCode>  
                     <drugCode2></drugCode2>  
                     <useLevel>2</useLevel>  
                    <drugName>硫普罗宁</drugName>
                   </row>
                   <row>
                    <classCode>011405</classCode>  
                    <drugType>1</drugType>  
                    <drugCode>01140510</drugCode>  
                    <drugCode2></drugCode2>  
                    <useLevel>2</useLevel>  
                    <drugName>水飞蓟宾</drugName>
                  </row>
                 </DrugInfoList>
                </function>
                ";
            XElement xe = XElement.Parse(xml);
            //获取单个字节点的值:
            string functionId = xe.Element("function_id").Value;
            Console.WriteLine(functionId);
            //遍历DrugInfoList节点下的所有子节点的值
            IEnumerable<XElement> ie= xe.Elements("DrugInfoList").Elements();
            foreach (XElement x in ie) 
 
            {
                Console.WriteLine("NodeName="+x.Name);
                foreach (XElement e in x.Elements())
                Console.WriteLine("Name:"+e.Name+",Value:"+e.Value);
            }

[XmlRoot(ElementName = "function")]
public class FunctionInfo
{
    public string function_id { get; set; }
    public string out_code { get; set; }
    public string out_text { get; set; }
    public string rows { get; set; }
    [XmlArray(ElementName = "DrugInfoList")]
    [XmlArrayItem(ElementName = "row", Type=typeof(DrugInfo))]
    public List<DrugInfo> drugInfoList { get; set; }
}

public class DrugInfo
{
    public string classCode { get; set; }
    public string drugType { get; set; }
    public string drugCode { get; set; }
    public string drugCode2 { get; set; }
    public string useLevel { get; set; }
    public string drugName { get; set; }
}

--------------------------------------------
FunctionInfo funcInfo = null;
using (var fs = File.OpenRead("XmlFile1.xml"))
{
    var xmlSer = new XmlSerializer(typeof(FunctionInfo));
    funcInfo = (FunctionInfo)xmlSer.Deserialize(fs);
}