利用反射从DataTable填充数据到实体类的问题

在项目开发中，我用这个方法从数据库读取数据封装实体类，减少体力代码量，犹其是一个类字段特多时。但我不知道这样会有什么问题，请大家指点，共同进步呀。

1.EntityHelper:

using System;
using System.Collections.Generic;
using System.Data;
using System.Reflection;
namespace Tuo.Dao
{
    public class EntityHelper
    {
        public static T GetEntity<T>(DataTable table) where T : new()
        {
            T entity = new T();
            foreach (DataRow row in table.Rows)
            {
                foreach (var item in entity.GetType().GetProperties())
                {
                    if (row.Table.Columns.Contains(item.Name))
                    {
                        if (DBNull.Value != row[item.Name])
                        {
                            item.SetValue(entity, row[item.Name].ToString(), null);
                        }
                    }
                }
            }

            return entity;
        }

        public static IList<T> GetEntities<T>(DataTable table) where T : new()
        {
            IList<T> entities = new List<T>();
            foreach (DataRow row in table.Rows)
            {
                T entity = new T();
                foreach (var item in entity.GetType().GetProperties())
                {
                    item.SetValue(entity, row[item.Name].ToString(), null);
                }
                entities.Add(entity);
            }
            return entities;
        }

        public static T ParseEntity<T>(object src) where T : new()
        {
            T entity = new T();
          
            foreach (var targetPro in typeof(T).GetProperties())
            {
                foreach (var srcPro in src.GetType().GetProperties())
                {
                    if(targetPro.Name==srcPro.Name){
                        targetPro.SetValue(entity, src.GetType().GetProperty(srcPro.Name).GetValue(src, null), null);
                    }
                }
            }
            return entity;
        }
        /*
        public static object ParseEntity(object source, Type target)
        {
            //object srcObj = Activator.CreateInstance(source);
            // Type srcType=
            if (source == null)
            {
                return null;
            }

            object tarObj = Activator.CreateInstance(target);
            try
            {
                foreach (var src in source.GetType().GetProperties())
                {
                    foreach (var tar in target.GetProperties())
                    {
                        if (src.Name == tar.Name)
                        {
                            target.GetProperty(tar.Name).SetValue(tarObj, source.GetType().GetProperty(tar.Name).GetValue(source, null), null);
                        }
                    }
                }
            }
            catch (Exception ex)
            {

                throw ex;
            }
            return tarObj;
        }*/
    }
}

2. Dao 从DataTable填充数据

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using Guc.Entity;
namespace Tuo.Dao
{
    public class DoctorDao
    {
        #region --sql--
                public Doctor GetDoctor(string tel, string doctorType)
        {
           

            string ehrID = ArchivesDao.GetArchievId(tel);
            Doctor doctor = null;
            if (!string.IsNullOrEmpty(ehrID))
            {

                string sql = string.Empty;
                switch (doctorType)
                {
                    case "1":
                        sql = home_doctor_sql;
                        break;
                    case "2":
                        sql = community_doctor_sql;
                        break;

                }

                if (!string.IsNullOrEmpty(sql))
                {
                    DataTable table = DBHelper.GetTable(sql, new SqlParameter[] { new SqlParameter("@ehr_id", ehrID) });
                    doctor = EntityHelper.GetEntity<Doctor>(table);
                }
            }
            return doctor;

        }
        #endregion

    }
}

以上代码有无效率问题？多谢大家指点！