diff --git a/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/DB/StockMaterrialDBHelp.cs b/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/DB/StockMaterrialDBHelp.cs
index ed8f400..c25e60e 100644
--- a/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/DB/StockMaterrialDBHelp.cs
+++ b/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/DB/StockMaterrialDBHelp.cs
@@ -75,9 +75,16 @@ namespace Mesnac.Action.ChemicalWeighing.AutoControl.DB
 
         public static int GetCodeById(int id)
         {
-            string sql = $"select Code from  lj_stock_material where Id={id}";
-            var dataTable = DBHelp.GetTable(sql);
-            return Convert.ToInt16(dataTable.Rows[0][0]);
+
+            if (id > 0)
+            {
+                string sql = $"select Code from  lj_stock_material where Id={id}";
+                var dataTable = DBHelp.GetTable(sql);
+                return Convert.ToInt16(dataTable.Rows[0][0]);
+            }
+
+            return id;
+
         }