序列化与反序列化

扩展相关类的方法：

    public static class Serialization
    {
        /// <summary>
        /// 将对象序列化成字符串 
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string SerializeToString( object obj) {
            IFormatter formater = new BinaryFormatter();
            MemoryStream stream = new MemoryStream();
            formater.Serialize(stream, obj);
            stream.Position = 0;
            byte[] b = new byte[stream.Length];
            stream.Read(b, 0, b.Length);
            stream.Close();
            return Convert.ToBase64String(b);
        }

        /// <summary>
        /// 将字符串序列化为对象 
        /// </summary>
        /// <param name="obj"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public static object DeSerializeObject(this string data) {
            byte[] b = Convert.FromBase64String(data);
            IFormatter formater = new BinaryFormatter();
            MemoryStream stream = new MemoryStream();
            stream.Write(b, 0, b.Length);
            stream.Position = 0;
            return (object)formater.Deserialize(stream);
        }

        /// <summary>
        /// 将对象序列化到 XML 
        /// </summary>
        /// <param name="savepath">XML文件保存的地址 </param>
        /// <param name="obj"></param>
        public static void SerializeToXML( this object obj,
                string savepath , Type user ) {
            XmlSerializer xs = new XmlSerializer(user);
            Stream stream = new FileStream(savepath, FileMode.Create,
                        FileAccess.Write, FileShare.Write);
            xs.Serialize(stream, obj);
            stream.Close();
        }

        /// <summary>
        /// 将 XML 序列化为对象 
        /// </summary>
        /// <param name="obj"></param>
        /// <param name="t"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        public static object DeSerializeFromXML(this object obj, 
            Type t, string path) {
            XmlSerializer xs = new XmlSerializer(t);
            Stream stream = new FileStream(path, FileMode.Open, FileAccess.Read);
            return xs.Deserialize(stream);
        }

    }

使用 Demo：
定义 SiteUser:

    [Serializable]
    public class SiteUser
    {
        public SiteUser() { }

        public int UserId
        { get; set; }

        public string UserName
        { get; set; }

        public string NickName
        { get; set; }

        public string Email
        { get; set; }

    }

在实际中使用方法：

        private string path = @"d:/siteuser.xml";

        private SiteUser sUser {
            get {
                SiteUser u = new SiteUser()
                {
                    UserId = 1051170,
                    UserName = "infozero",
                    NickName = "感恩的心",
                    Email = "infozero@163.com"
                };
                return u;
            }
        }

        protected void btnser_Click(object sender, EventArgs e)
        {
            string text = Serialization.SerializeToString(sUser);
            tbvalue.Text = text;
        }

        protected void btndeser_Click(object sender, EventArgs e)
        {
            string text = tbvalue.Text;
            SiteUser u = text.DeSerializeObject() as SiteUser;

            tbname.Text = u.UserName;
            tbnick.Text = u.NickName;
            tbuid.Text = u.UserId.ToString();
            tbemail.Text = u.Email;

        }

        protected void btntoxml_Click(object sender, EventArgs e)
        {
            SiteUser u = sUser;
            u.SerializeToXML(path , typeof(SiteUser) );
        }

        protected void btndesxml_Click(object sender, EventArgs e)
        {
            SiteUser u = new SiteUser();
            u = u.DeSerializeFromXML(typeof(SiteUser), path) as SiteUser;

            tbname.Text = u.UserName;
            tbnick.Text = u.NickName;
            tbuid.Text = u.UserId.ToString();
            tbemail.Text = u.Email;
        }

其中生成 XML 文件信息如下：

<?xml version="1.0"?>
<SiteUser xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <UserId>1051170</UserId>
  <UserName>infozero</UserName>
  <NickName>感恩的心</NickName>
  <Email>infozero@163.com</Email>
</SiteUser>