// Barcode Scan
 private void tbProdNo_KeyDown(object sender, KeyEventArgs e)
 {
     if (e.Key == Key.Return)
     {
         string search = tbProdNo.Text;
         string scan   = "SELECT prodNo FROM datainventory WHERE prodNo= '" + search + "'";
         con.query(scan);
         try
         {
             con.Open();
             MySqlDataReader reader = con.read();
             if (reader.Read())
             {
                 string[] row = { reader.GetString(0) };
                 checker.Text = row[0];
                 if (checker.Text == search)
                 {
                     var ans = MessageBox.Show("Do you want to restock this item?", "Item Already Exist", MessageBoxButton.YesNo, MessageBoxImage.Question);
                     if (ans == MessageBoxResult.Yes)
                     {
                         window_restockItem wit = new window_restockItem();
                         wit.ShowDialog();
                         Clear();
                     }
                     else
                     {
                         con.Close();
                         Clear();
                     }
                 }
             }
             reader.Close();
             reader.Dispose();
             con.Close();
         }
         catch (Exception x)
         {
             MessageBox.Show(x.Message);
         }
     }
 }
        // Restock Button
        private void sortRestock_Click(object sender, RoutedEventArgs e)
        {
            window_restockItem restockItem = new window_restockItem();

            restockItem.ShowDialog();
        }