public System.Int32 AddDanhMucItem(DanhMucItemData data)
 {
     try
     {
         var domain = new DanhMucItemDomainObject(ConnectionString);
         return domain.Add(data);
     }
     catch (Exception ex)
     {
         ErrorLog.WebLog("[AddDanhMucItem]", ex.Message);
     }
     return -1;
 }