diff --git a/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/DB/StockMaterrialDBHelp.cs b/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/DB/StockMaterrialDBHelp.cs
index 83f3448..ed8f400 100644
--- a/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/DB/StockMaterrialDBHelp.cs
+++ b/Actions/ChemicalWeighing/Mesnac.Action.ChemicalWeighing/AutoControl/DB/StockMaterrialDBHelp.cs
@@ -38,6 +38,11 @@ namespace Mesnac.Action.ChemicalWeighing.AutoControl.DB
             DataTable dataTable = new DataTable();
             dataTable.Columns.Add("CmbValue", typeof(string));
             dataTable.Columns.Add("CmbDisplay", typeof(string));
+
+            DataRow dr = dataTable.NewRow();
+            dr[0] = "-1";
+            dr[1] = "请选择";
+            dataTable.Rows.Add(dr);
             return dataTable;
         }
         
@@ -48,7 +53,7 @@ namespace Mesnac.Action.ChemicalWeighing.AutoControl.DB
         public static DataTable GetSiloMaterrial()
         {
             var list1 = GetStockMaterrial(1);
-            list1 = list1.Where(x => x.CmbValue == 5 || x.CmbValue == 6).ToList();
+            list1 = list1.Where(x => x.CmbValue == 5 || x.CmbValue == 6 ).ToList();
             var dt = GetMcBox();
             foreach (var entity in list1)
             {
@@ -84,11 +89,7 @@ namespace Mesnac.Action.ChemicalWeighing.AutoControl.DB
 
             var dataTable = DBHelp.GetTable(sql);
             List<MyMCCombobox> ls = new List<MyMCCombobox>();
-            ls.Add(new MyMCCombobox()
-            {
-                CmbValue = -1,
-                CmbDisplay = "请选择"
-            });
+            
             foreach (DataRow o in dataTable.Rows)
             {
                 int tableMTypeId = Convert.ToInt32(o["MTypeId"]);