private string GetHIVTestKits(string order)
 {
     try
     {
         var x = context.spView_OrderNumber_HIVTestKitsGetAll1(order).FirstOrDefault();
         if (x != null)
         {
             return(Increment(x.OrderIndex));
         }
         else
         {
             return("001");
         }
     }
     catch (Exception e)
     {
         throw (e);
     }
 }