更新查询未更新

Question

我正在尝试使用UPDATE查询更新我的 Access 数据库。但是由于某种原因，它没有更新，也没有给我一个错误，即使它位于try和catch中。

using (OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\ezter\Desktop\BalfakihPOS.mdb"))
            {
                try
                {

                    OleDbCommand cmd = new OleDbCommand("SELECT COUNT(*) FROM Products WHERE BarCode = @BarCode", con);
                    cmd.Parameters.AddWithValue("@Code", barcode.Text);

                    con.Open();
                    int result = Convert.ToInt32(cmd.ExecuteScalar());
                    con.Close();
                    if (result >= 1)
                    {
                        cmd = new OleDbCommand("UPDATE Products SET Product_Name=@Product_Name, Product_Price=@Product_Price, WholeSale_Price=@WholeSale_Price, " +
                            "Product_Quantity=@Product_Quantity, Production_Date=@Production_Date, Expire_Date=@Expire_Date, Product_Cate=@Product_Cate, Product_Disc=@Product_Disc WHERE BarCode=@BarCode  ", con);
                        OleDbParameter[] param = new OleDbParameter[9];

                        param[0] = new OleDbParameter("@BarCode", OleDbType.Integer);
                        param[0].Value = barcode.Text;

                        param[1] = new OleDbParameter("@Product_Name", OleDbType.VarChar);
                        param[1].Value = pnametxt.Text;

                        param[2] = new OleDbParameter("@Product_Price", OleDbType.Integer);
                        param[2].Value = price.Text;

                        param[3] = new OleDbParameter("@WholeSale_Price", OleDbType.Integer);
                        param[3].Value = wsprice.Text;

                        param[4] = new OleDbParameter("@Product_Quantity", OleDbType.Integer);
                        param[4].Value = pqty.Text;

                        param[5] = new OleDbParameter("@Production_Date", OleDbType.DBDate);
                        param[5].Value = pdate.Text;

                        param[6] = new OleDbParameter("@Expire_Date", OleDbType.DBDate);
                        param[6].Value = expdate.Text;

                        param[7] = new OleDbParameter("@Product_Cate", OleDbType.VarChar);
                        param[7].Value = Convert.ToString(catecombo.SelectedItem);

                        param[8] = new OleDbParameter("@Product_Disc", OleDbType.VarChar);
                        param[8].Value = pdisc.Text;

                        con.Open();
                        cmd.Parameters.AddRange(param);
                        cmd.ExecuteNonQuery();

                    }