PXSelector list doesn't sort by lineNbr

Hi @SadokHanini 

 PXSelectorAttribute will only sort by key(foreign) or a substitute key. Any other field used on the sort won't affect the sorting.

Just you can give a try with custom selector.

Here is the sample code for custom Selector

        [PXDBString(IsUnicode = true)]
         [TaxzoneSelector]
        [PXUIField(DisplayName = "Tax Zone", Enabled = true)]
        public string TaxZone { get; set; }

        public abstract class taxZone : BqlString.Field<taxZone> { }

 internal class TaxzoneSelectorAttribute : PXCustomSelectorAttribute
    {        
        public PXSelect<TaxZone> Taxzones;
        public TaxzoneSelectorAttribute() : base(typeof(TaxZone.taxZoneID))
        { }
        protected virtual IEnumerable GetRecords()
        {
            object setup = this._Graph.Views["KCFPluginSetup"].Cache.Current;
            CFPluginSetup setup1 = (CFPluginSetup)setup;
            SCPluginSetupExtn extn = setup1.GetExtension<KNSCPluginSetupExtn>();
            if (extn?.TaxZonePreference == SCConstants.ImportManual && !this._Graph.IsCopyPasteContext)
            {
                return PXSelect<TaxZone, Where<TaxZone.isExternal, Equal<False>>>.Select(this._Graph).RowCast<TaxZone>().ToList();
            }
            else
                return PXSelect<TaxZone>.Select(this._Graph).RowCast<TaxZone>().ToList();
        }
    }