public bool ManageProduct(int ProductId,
                           string ProductName,
                           DateTime StartDate,
                           DateTime EndDate,
                           string Description,
                           int Mode)
 {
     try
     {
         int rs = pc.ManageProduct(ProductId,
                                   ProductName,
                                   StartDate,
                                   EndDate,
                                   Description,
                                   Mode);
         if (rs > 0)
         {
             return(true);
         }
         else
         {
             return(false);
         }
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }