Hi @aaghaei 

Please try with below line code,

Base.Document.View.RequestRefresh();

Normally the CuryLineAmt, CuryLineAmt fields have the property commit changes=true, If any values are updated, they should recalculate and reflect in total without refreshing the header.

Thanks @jinin 

The RequestRefresh command will help if the record set is updated but UI is not. In my case my POOrder cache is not updated so will not make any difference but anyways I tested and as I expeced the outcome didn’t change.

As you indicated these two fields CommitChanges by default are set to True by Acumatica itself. That is why when user enters value for them in the Grid, it updates the header summary fields and I had mentioned it in my original post.

Any other thought? 

@aaghaei It seems that the POTaxAttribute attached to POLine.TaxcategoryID is the one responsible for updating Line Total (curyLineTotal) at the header using SumCalc<>, so, you can emulate this by doing the following in your event:

PXFormulaAttribute.SetAggregate<POLine.curyExtCost>(Base.Cachesetypeof(POLine)], typeof(SumCalc<POOrder.curyLineTotal>));
PXFormulaAttribute.CalcAggregate<POLine.curyExtCost>(Base.Cachesetypeof(POLine)], poOrderRow);

Thank you @Dioris Aguilar 

You are right the TaxCategoryID is responsible to update POTax, PORetainedTax and POUnbilled Tax but 1) there are more fields on the header that need to be reclaculated and the POTax tab also will need to be updated. I slightly changed your suggested code as follow to work but it only updates CuryLineTotal.

PXFormulaAttribute.SetAggregate<POLine.curyExtCost>(Base.Cachesetypeof(POLine)], typeof(SumCalc<POOrder.curyLineTotal>));
PXFormulaAttribute.CalcAggregate<POLine.curyExtCost>(Base.Cachesetypeof(POLine)], Base.Document.Current);
 

Considering the complication around tax per line I’m unsure how the rest of the fields can be updated when not a single field in line make up most of the fields on header. Any thought?

@aaghaei You can see the remaining fields in the header are calculated inside the POUnbilledTaxAttribute and PORetainedTaxAttribute also attached to TaxCategoryID, and they inherit from TaxAttribute, so, maybe what’s needed is only recalculate the taxes for the whole document. Try the following in your RowUpdated event and probably by doing this the SetAggregate and CalcAggregate won’t be needed since the POTaxAttribute also inherits from TaxAttribute:
 

TaxAttribute.InvokeRecalcTaxes(sender);

@Dioris Aguilar thank you for all your help. Your suggested approach didn’t work but I figured out how to make it work. All I had to do was to Invoke the base handler after my custom code. Here is my completed code that works as intended.

        protected void POLine_RowUpdated(PXCache cache, PXRowUpdatedEventArgs e, PXRowUpdated InvokeBaseHandler)
        {
            var newRow = e.Row as POLine;
            var oldRow = e.OldRow as POLine;

            if (newRow != null && oldRow != null)
            {
                if (newRow.InventoryID != oldRow.InventoryID || newRow.UOM != oldRow.UOM)
                {
                    if (oldRow.CuryLineAmt != decimal.Zero && newRow.CuryLineAmt == decimal.Zero)
                    {
                        newRow.TranDesc = oldRow.TranDesc;
                        newRow.TaxCategoryID = oldRow.TaxCategoryID;

                        newRow.OrderQty = oldRow.OrderQty;
                        newRow.UnitCost = oldRow.UnitCost;
                        newRow.CuryUnitCost = oldRow.CuryUnitCost;
                        newRow.LineAmt = oldRow.LineAmt;
                        newRow.CuryLineAmt = oldRow.CuryLineAmt;

                        newRow.ExtCost = oldRow.ExtCost;
                        newRow.CuryExtCost = oldRow.CuryExtCost;

                        newRow.DiscPct = oldRow.DiscPct;
                        newRow.DiscAmt = oldRow.DiscAmt;
                        newRow.CuryDiscAmt = oldRow.CuryDiscAmt;

                        newRow.DiscCost = oldRow.DiscCost;
                        newRow.CuryDiscCost = oldRow.CuryDiscCost;

                        newRow.RetainagePct = oldRow.RetainagePct;
                        newRow.RetainageAmt = oldRow.RetainageAmt;
                        newRow.CuryRetainageAmt = oldRow.CuryRetainageAmt;
                    }
                }
            }

            InvokeBaseHandler?.Invoke(cache, e);
        }