public void CustomerReviewMainSurface(ComboBox comboBox1, ComboBox combobox2, ComboBox combobox3)
 {
     try
     {
         SqlDataReader rd;
         rd = dw.CustomerReviewMainSurface_2();
         while (rd.Read())
         {
             if ((!comboBox1.Items.Contains(rd["type"]) && (rd["type"] != "")))
             {
                 comboBox1.Items.Add(rd["type"]);
             }
         }
     }
     catch (Exception e)
     {
         MessageBox.Show(e.Message);
     }
 }