Hello everybody,

today I want to leave a note on how to use PXLineNbr attribute in Acumatica pages. Recently myself and one of my team members struggled a bit with a question on how to add it properly. Below goes a bit changed worked tempalte:

public class PrimaryTable : IBqlTable
{
    #region LineId
    public abstract class lineId : PX.Data.BQL.BqlInt.Field<lineId> { }
 
    [PXDBInt]
    [PXDefault(0)]
    public virtual int? LineId { get; set; }
    #endregion
 
    #region LineCntr
    public abstract class lineCntr : PX.Data.BQL.BqlInt.Field<lineCntr> { }
 
    [PXDBInt]
    [PXDefault(0)]
    public virtual int? LineCntr { get; set; }
    #endregion
}
 
public class DetailsTable : IBqlTable
{
    #region LineNbr
    public abstract class lineNbr : IBqlField { }
 
    [PXDBInt(IsKey = true)]
    [PXDefault]
    [PXLineNbr(typeof(PrimaryTable.lineCntr))]
    [PXParent(typeof(SelectFrom<PrimaryTable>.Where<PrimaryTable.lineId.IsEqual<PrimaryTable.lineId
        .FromCurrent>>))]
    public virtual int? LineNbr { get; set; }
    #endregion
}

Summary

As you see, nothing special in this code. Add PXParent, PXLineNbr and enjoy with line counter feature.