【求助】我的session["orderline"]怎么不能把值传给DataTable呢？急求答案。。。
如题所示，这是全部代码：

 if (Session["orderline"] != null)
            {
                DataTable DT = new DataTable();
                DT = Session["orderline"] as DataTable;

                for (int i = 0; i < DT.Rows.Count; i++)
                {
                    DataRow rw = dataTable.NewRow();
                    rw["ItemCode"] = DT.Rows[i]["ItemCode"];
                    rw["Dscription"] = DT.Rows[i]["Dscription"];
                    rw["U_U001"] = DT.Rows[i]["U_U001"];
                    rw["PriceBefDi"] = DT.Rows[i]["PriceBefDi"];
                    rw["U_U012"] = DT.Rows[i]["U_U012"];
                    rw["ShipDate"] = DT.Rows[i]["ShipDate"];
                    rw["U_ZK"] = DT.Rows[i]["U_ZK"];
                    rw["quantity"] = DT.Rows[i]["quantity"];
                    rw["LineTotal"] = DT.Rows[i]["LineTotal"];
                    rw["Price"] = DT.Rows[i]["Price"];
                    rw["U_NDFL"] = DT.Rows[i]["U_NDFL"];
                    rw["U_JDFL"] = DT.Rows[i]["U_JDFL"];
                    rw["U_YDFL"] = DT.Rows[i]["U_YDFL"];
                    rw["U_ZXFL"] = DT.Rows[i]["U_ZXFL"];
                    rw["U_GGFL"] = DT.Rows[i]["U_GGFL"];
                    rw["U_ZLFL"] = DT.Rows[i]["U_ZLFL"];
                    dsOrderLine.Tables[0].Rows.Add(rw);
                } 
 
            }

在session["orderline"]中明明是有数据的，但是DT却为空，这是怎么个情况呢？求帮助~~~~
[解决办法]
存的时候用DataSet.Tables[0] 再存进Session