fix

AutoTurnOver.DB/dc_auto_stock_monitor_dao.cs

@@ -174,6 +174,10 @@ where tdb.usable_stock>0 ";
         /// <returns></returns>
         public static List<string> GetShowField(string warehouse_code)
         {
+            if (string.IsNullOrWhiteSpace(warehouse_code))
+            {
+                return new List<string>();
+            }
             var wData = _connection.QuerySingleOrDefault<dc_base_warehouse>(" select * from dc_base_warehouse where warehouse_code=@warehouse_code ",new { warehouse_code  = warehouse_code });
             if (wData.hq_type == "国内仓")
             {