反射赋值

目前例子为NPOI Excel导入 入库时调用

 var file = file1.PostedFile.InputStream;
            var fileExt = System.IO.Path.GetExtension(file1.FileName);
            IWorkbook workbook;
            if (fileExt == ".xlsx")
                workbook = new XSSFWorkbook(file);
            else
                workbook = new HSSFWorkbook(file);

            DB.DBContext db = new DB.DBContext();
            List<DB.Entity.dt_orders> list_orders = new List<DB.Entity.dt_orders>();
            #region 订单记录
            var sheet_order = workbook.GetSheet("订单记录");
            if (sheet_order != null)
            {

                List<string> list_hread = new List<string>();
                //获取Excel的最大行数
                int rowsCount = sheet_order.PhysicalNumberOfRows;
                int colsCount = sheet_order.GetRow(1).PhysicalNumberOfCells;
                //获取字段
                for (int i = 0; i < colsCount; i++)
                {
                    list_hread.Add(sheet_order.GetRow(1).GetCell(i).ToString());
                }
                //数据填充
                for (int x = 2; x < rowsCount; x++)
                {
                    var model_order = new DB.Entity.dt_orders();
                    var row = sheet_order.GetRow(x);
                    SetValue(model_order, row, list_hread);
                    list_orders.Add(model_order);
                }
                //过滤掉已有的订单
                var list_ordersno = list_orders.Select(d => d.order_no).ToList();
                var dt_list_ordersno = db.dt_orders.Where(d => list_ordersno.Contains(d.order_no)).Select(d => d.order_no).ToList();
                list_orders.RemoveAll(d => dt_list_ordersno.Contains(d.order_no));
            }
            #endregion

/// <summary>
        /// 反射赋值
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="model"></param>
        /// <param name="row"></param>
        /// <param name="list_hread"></param>
        private void SetValue<T>(T model, IRow row, List<string> list_hread)
        {
            System.Reflection.PropertyInfo[] myPropertyInfo = model.GetType().GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);
            for (int i = 0; i < list_hread.Count; i++)
            {
                var hread = list_hread[i];
                var pi = model.GetType().GetProperty(hread);               
                try
                {
                    var value = Convert.ChangeType((object)row.GetCell(i).ToString(), (Nullable.GetUnderlyingType(pi.PropertyType) ?? pi.PropertyType));
                    pi.SetValue(model, value, null);
                }
                catch (Exception ex)
                {
                    pi.SetValue(model, null, null);
                }

            }
        }