c#利用反射，实现将model类变成字符串、再还原成mode对象的功能

public string ToString(UserGiftCardModel model)        {            if (model == null) return "";            string sb = "";            Type type =model.GetType() ;//assembly.GetType("Reflect_test.PurchaseOrderHeadManageModel", true, true); //命名空间名称 + 类名              //创建类的实例              //object obj = Activator.CreateInstance(type, true);            //获取公共属性              PropertyInfo[] Propertys = type.GetProperties();            for (int i = 0; i < Propertys.Length; i++)            {                // Propertys[i].SetValue(Propertys[i], i, null); //设置值                  PropertyInfo pi = type.GetProperty(Propertys[i].Name);                object val=pi.GetValue(model, null);                string value = val == null ? "" : val.ToString(); ;                sb += Propertys[i].Name +"|"+ value + "_"; //获取值                 // Console.WriteLine("属性名：{0},类型：{1}", Propertys[i].Name, Propertys[i].PropertyType);            }            if(sb.Length>0) sb=sb.Substring(0,sb.Length-1);            return sb;        }        public UserGiftCardModel DesToString(string modelstr)        {            if (modelstr == "") return null;            UserGiftCardModel model = new UserGiftCardModel();            Type type = model.GetType();//assembly.GetType("Reflect_test.PurchaseOrderHeadManageModel", true, true); //命名空间名称 + 类名              //创建类的实例              //object obj = Activator.CreateInstance(type, true);            Dictionary<string, object> dict = new Dictionary<string, object>();            //获取公共属性              PropertyInfo[] Propertys = type.GetProperties();            object[] objs = modelstr.Split('_');            foreach (object obj in objs)            {                object[] obj1 = obj.ToString().Split('|');                dict[obj1[0].ToString()] = obj1[1];            }            for (int i = 0; i < Propertys.Length; i++)            {               string p_type= Propertys[i].PropertyType.ToString().ToLower();               if (dict[Propertys[i].Name].ToString() == "") dict[Propertys[i].Name] = null;                // Propertys[i].SetValue(Propertys[i], i, null); //设置值                 PropertyInfo pi = type.GetProperty(Propertys[i].Name);                object value=null;                                if (p_type.Contains("decimal"))                {                    if (dict[Propertys[i].Name] != null)                        value = Convert.ToDecimal(dict[Propertys[i].Name]);                }                else if (p_type.Contains("int32"))                {                    if (dict[Propertys[i].Name] != null)                        value = Convert.ToInt32(dict[Propertys[i].Name]);                }                else if (p_type.Contains("int64"))                {                    if (dict[Propertys[i].Name] != null)                        value = Convert.ToInt64(dict[Propertys[i].Name]);                }                else if (p_type.Contains("datetime") || p_type.Contains("date"))                {                    if (dict[Propertys[i].Name] != null)                        value = Convert.ToDateTime(dict[Propertys[i].Name]);                }                else                {                    value = dict[Propertys[i].Name];                }                pi.SetValue(model, value, null);                //Console.WriteLine("属性名：{0},类型：{1}", Propertys[i].Name, Propertys[i].PropertyType);            }            return model;        }

public class UserGiftCardModel{#region 构造函数/// <summary>/// 无参构造函数 /// </summary>public UserGiftCardModel(){}/// <summary>        /// 有参构造函数        /// </summary>/// <param name=" _cardnumber">礼品卡号</param>/// <param name=" _password">卡密码</param>/// <param name=" _festivalname">节日名称</param>/// <param name=" _facevalue">面值</param>/// <param name=" _balance">余额</param>/// <param name=" _couponamount">奖励金额</param>/// <param name=" _picture">图片</param>/// <param name=" _title">标题 </param>/// <param name=" _buytime">购买时间</param>/// <param name=" _buyid">购买人ID</param>/// <param name=" _recieveid">接收人ID</param>/// <param name=" _receiveemail">接收者邮箱</param>/// <param name=" _leavewords">留言</param>public UserGiftCardModel(string _cardnumber,string _password,string _festivalname,decimal _facevalue,decimal _balance,decimal _couponamount,string _picture,string _title,DateTime _buytime,int _buyid,int _recieveid,string _receiveemail,string _leavewords)        {        this._cardnumber = _cardnumber;        this._password = _password;        this._festivalname = _festivalname;        this._facevalue = _facevalue;        this._balance = _balance;        this._couponamount = _couponamount;        this._picture = _picture;        this._title = _title;        this._buytime = _buytime;        this._buyid = _buyid;        this._recieveid = _recieveid;        this._receiveemail = _receiveemail;        this._leavewords = _leavewords;        }        #endregion        #region 数据库字段对应的属性      private string _cardnumber = "";/// <summary>/// 礼品卡号        /// </summary>        public string CardNumber        {            get{ return _cardnumber; }            set{ _cardnumber = value; }        }        private string _password = "";/// <summary>/// 卡密码        /// </summary>        public string Password        {            get{ return _password; }            set{ _password = value; }        }        private string _festivalname = "";/// <summary>/// 节日名称        /// </summary>        public string FestivalName        {            get{ return _festivalname; }            set{ _festivalname = value; }        }        private decimal? _facevalue = null;/// <summary>/// 面值        /// </summary>        public decimal? FaceValue        {            get{ return _facevalue; }            set{ _facevalue = value; }        }        private decimal? _balance = null;/// <summary>/// 余额        /// </summary>        public decimal? Balance        {            get{ return _balance; }            set{ _balance = value; }        }        private decimal? _couponamount = null;/// <summary>/// 奖励金额        /// </summary>        public decimal? CouponAmount        {            get{ return _couponamount; }            set{ _couponamount = value; }        }        private string _picture = "";/// <summary>/// 图片        /// </summary>        public string Picture        {            get{ return _picture; }            set{ _picture = value; }        }        private string _title = "";/// <summary>/// 标题         /// </summary>        public string Title        {            get{ return _title; }            set{ _title = value; }        }        private DateTime? _buytime = null;/// <summary>/// 购买时间        /// </summary>        public DateTime? BuyTime        {            get{ return _buytime; }            set{ _buytime = value; }        }        private int? _buyid = null;/// <summary>/// 购买人ID        /// </summary>        public int? BuyID        {            get{ return _buyid; }            set{ _buyid = value; }        }        private int? _recieveid = null;/// <summary>/// 接收人ID        /// </summary>        public int? RecieveID        {            get{ return _recieveid; }            set{ _recieveid = value; }        }        private string _receiveemail = "";/// <summary>/// 接收者邮箱        /// </summary>        public string ReceiveEmail        {            get{ return _receiveemail; }            set{ _receiveemail = value; }        }        private string _leavewords = "";/// <summary>/// 留言        /// </summary>        public string LeaveWords        {            get{ return _leavewords; }            set{ _leavewords = value; }        }        #endregion        #region 根据需要自定义字段        //private string _test = "";        ///// <summary>        ///// 其他字段        ///// </summary>        //public string Test        //{        //    get { return _test; }        //    set { _test = value; }        //}         #endregion        }

已测试过。