实体类转DataTable及DataTable转实体类互转

/// <summary>
        /// 实体类转换成DataTable
        /// </summary>
        /// <param name="modelList">实体类列表</param>
        /// <returns></returns>
        public static DataTable FillDataTable<T>(List<T> modelList)
        {
            if (modelList == null || modelList.Count == 0)
            {
                return null;
            }
            DataTable dt = CreateData(modelList[0]);

            foreach (T model in modelList)
            {
                DataRow dataRow = dt.NewRow();
                foreach (PropertyInfo propertyInfo in typeof(T).GetProperties())
                {
                    dataRow[propertyInfo.Name] = propertyInfo.GetValue(model, null);
                }
                dt.Rows.Add(dataRow);
            }
            return dt;
        }

        /// <summary>
        /// 根据实体类得到表结构
        /// </summary>
        /// <param name="model">实体类</param>
        /// <returns></returns>
        private static DataTable CreateData<T>(T model)
        {
            DataTable dataTable = new DataTable(typeof(T).Name);
            foreach (PropertyInfo propertyInfo in typeof(T).GetProperties())
            {
                dataTable.Columns.Add(new DataColumn(propertyInfo.Name, propertyInfo.PropertyType));
            }
            return dataTable;
        }

  /// <summary>
        /// DataTable转实体类
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dt"></param>
        /// <returns></returns>
        private static List<T> TableToEntity<T>(DataTable dt) where T : class,new()
        {
            // 定义集合 
            List<T> ts = new List<T>();
            // 获得此模型的类型 
            Type type = typeof(T);
            //定义一个临时变量 
            string tempName = string.Empty;
            //遍历DataTable中所有的数据行        
            foreach (DataRow dr in dt.Rows)
            {
                T t = new T();
                // 获得此模型的公共属性 
                PropertyInfo[] propertys = t.GetType().GetProperties();
                //遍历该对象的所有属性 
                foreach (PropertyInfo pi in propertys)
                {
                    tempName = pi.Name;//将属性名称赋值给临时变量   
                    //检查DataTable是否包含此列（列名==对象的属性名）     
                    if (dt.Columns.Contains(tempName))
                    { 
                        // 判断此属性是否有Setter   
                        if (!pi.CanWrite) continue;//该属性不可写，直接跳出   
                        //取值   
                        object value = dr[tempName];
                        //如果非空，则赋给对象的属性   
                        if (value != DBNull.Value)
                            pi.SetValue(t, value, null);
                    }
                }
                //对象添加到泛型集合中 
                ts.Add(t);
            }
            return ts;
        }