c# XML和实体类之间相互转换(序列化和反序列化)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Data;
using System.Xml;
using System.Xml.Serialization;
 
/// <summary>
/// Xml序列化与反序列化
/// </summary>
public class XmlUtil
{
    #region 反序列化
    /// <summary>
    /// 反序列化
    /// </summary>
    /// <param name="type">类型</param>
    /// <param name="xml">XML字符串</param>
    /// <returns></returns>
    public static object Deserialize(Type type, string xml)
    {
        try
        {
            using (StringReader sr = new StringReader(xml))
            {
                XmlSerializer xmldes = new XmlSerializer(type);
                return xmldes.Deserialize(sr);
            }
        }
        catch (Exception e)
        {
 
            return null;
        }
    }
    /// <summary>
    /// 反序列化
    /// </summary>
    /// <param name="type"></param>
    /// <param name="xml"></param>
    /// <returns></returns>
    public static object Deserialize(Type type, Stream stream)
    {
        XmlSerializer xmldes = new XmlSerializer(type);
        return xmldes.Deserialize(stream);
    }
    #endregion
 
    #region 序列化
    /// <summary>
    /// 序列化
    /// </summary>
    /// <param name="type">类型</param>
    /// <param name="obj">对象</param>
    /// <returns></returns>
    public static string Serializer(Type type, object obj)
    {
        MemoryStream Stream = new MemoryStream();
        XmlSerializer xml = new XmlSerializer(type);
        try
        {
            //序列化对象
            xml.Serialize(Stream, obj);
        }
        catch (InvalidOperationException)
        {
            throw;
        }
        Stream.Position = 0;
        StreamReader sr = new StreamReader(Stream);
        string str = sr.ReadToEnd();
         
        sr.Dispose();
        Stream.Dispose();
 
        return str;
    }
 
    #endregion
}

/* 实体对象转换到Xml */
public class Student
{
    public string Name { set; get; }
    public int Age { set; get; }
} 
Student stu1 = new Student() { Name = "okbase", Age = 10 };
string xml = XmlUtil.Serializer(typeof(Student), stu1);
Console.Write(xml);


/* Xml转换到实体对象 */
Student stu2 = XmlUtil.Deserialize(typeof(Student), xml) as Student;
Console.Write(string.Format("名字:{0},年龄:{1}", stu2.Name, stu2.Age));


/* DataTable转换到Xml */
// 生成DataTable对象用于测试
DataTable dt1 = new DataTable("mytable");   // 必须指明DataTable名称 
dt1.Columns.Add("Dosage", typeof(int));
dt1.Columns.Add("Drug", typeof(string));
dt1.Columns.Add("Patient", typeof(string));
dt1.Columns.Add("Date", typeof(DateTime)); 
// 添加行
dt1.Rows.Add(25, "Indocin", "David", DateTime.Now);
dt1.Rows.Add(50, "Enebrel", "Sam", DateTime.Now);
dt1.Rows.Add(10, "Hydralazine", "Christoff", DateTime.Now);
dt1.Rows.Add(21, "Combivent", "Janet", DateTime.Now);
dt1.Rows.Add(100, "Dilantin", "Melanie", DateTime.Now); 
// 序列化
xml = XmlUtil.Serializer(typeof(DataTable), dt1);
Console.Write(xml);


/* Xml转换到DataTable */
// 反序列化
DataTable dt2 = XmlUtil.Deserialize(typeof(DataTable), xml) as DataTable; 
// 输出测试结果
foreach (DataRow dr in dt2.Rows)
{
    foreach (DataColumn col in dt2.Columns)
    {
        Console.Write(dr[col].ToString() + " ");
    } 
    Console.Write("
");
}

/* List转换到Xml */
// 生成List对象用于测试
List<Student> list1 = new List<Student>(3); 
list1.Add(new Student() { Name = "okbase", Age = 10 });
list1.Add(new Student() { Name = "csdn", Age = 15 });
// 序列化
xml = XmlUtil.Serializer(typeof(List<Student>), list1);
Console.Write(xml);

/* Xml转换到List */
List<Student> list2 = XmlUtil.Deserialize(typeof(List<Student>), xml) as List<Student>;
foreach (Student stu in list2)
{
    Console.WriteLine(stu.Name + "," + stu.Age.ToString());
}

    protected void Page_Load(object sender, EventArgs e)
    {
        string strTest = @"<Relationships>
          <VariationParent xmlns='http://www.microsoft.com/schema/Products/2011-10-01'>
            <Identifiers>
              <MarketplaceASIN>
                <MarketplaceId>ATVPDKIKX0DER</MarketplaceId>
                <ASIN>B00K69WURQ</ASIN>
              </MarketplaceASIN>
              <MarketplaceASIN>
                <MarketplaceId>TBVPDKIKX0DER</MarketplaceId>
                <ASIN>C00K69WURQ</ASIN>
              </MarketplaceASIN>
              <MarketplaceASIN>
                <MarketplaceId>KlVPDKIKX0DER</MarketplaceId>
                <ASIN>D00K69WURQ</ASIN>
              </MarketplaceASIN>
            </Identifiers>
          </VariationParent>
        </Relationships>";
        TextBox1.Text = "";

        XmlDocument doc = new XmlDocument();
        doc.LoadXml(strTest);
        XmlElement root = doc.DocumentElement;
        //用于带命名空间的XML操作
        XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
        nsmgr.AddNamespace("ab", "http://www.microsoft.com/schema/Products/2011-10-01");
        XmlNodeList macthNodes = root.SelectNodes("//ab:Identifiers/ab:MarketplaceASIN", nsmgr);

        for (int i = 0; i < macthNodes.Count; i++)
        {
            //删除生成的命名空间，生成标准XML。
            string matchNode = CleanXmlnsTag(macthNodes[i].OuterXml);
            MarketplaceASIN ma = XmlUtil.Deserialize(typeof(MarketplaceASIN), matchNode) as MarketplaceASIN;
            if (ma != null)
            {
                Response.Write(ma.MarketplaceId + "---------" + ma.ASIN + "<br/>");
            }
        }
    }

    /* 实体对象 */
    public class MarketplaceASIN
    {
        public string MarketplaceId { set; get; }
        public string ASIN { set; get; }
    }

    protected string CleanXmlnsTag(string xml)
    {
        xml = xml.Replace("xmlns="http://www.microsoft.com/schema/Products/2011-10-01"", "");
        return xml;
    }