处理可能出现的空值

UAS-MES/FunctionCode/Make/Make_PackageCollection.cs

@@ -143,7 +143,7 @@ namespace UAS_MES.Make
                         //获取序列号信息
                         sql.Clear();
                         sql.Append("select pr_code,ms_makecode,nvl(pa_downstatus,0) pa_downstatus,pa_sccode,pa_checkno,pr_packrule,pr_code,pr_detail,");
-                        sql.Append("pr_outboxinnerqty from makeserial left join product on ms_prodcode=pr_code left join packagedetail ");
+                        sql.Append("nvl(pr_outboxinnerqty,0)pr_outboxinnerqty from makeserial left join product on ms_prodcode=pr_code left join packagedetail ");
                         sql.Append("on pd_barcode=ms_sncode left join package on pa_id =pd_paid where ms_id='" + oMsID + "'");
                         dt = (DataTable)dh.ExecuteSql(sql.GetString(), "select");
                         if (dt.Rows.Count > 0)