We will add "Cubage" and a value to column 2 column label and line value.
Note how to Dataset.GetValue() is used to get the existing value, before adding to it using Dataset.SetValue().
[EventSubscriber(ObjectType::Codeunit, Codeunit::"MOB Print", 'OnPrintLabel_OnAfterPopulateOrderListLine', '', true, true)]
local procedure OnPrintLabelOnAfterPopulateDataset(_LinePath: Text; _SourceRecRef: RecordRef; var _Dataset: Record "MOB Common Element")
var
LicensePlateContent: Record "MOB License Plate Content";
MobLabelTemplate: Record "MOB Label-Template";
WhseShipmentLine: Record "Warehouse Shipment Line";
begin
if not MobLabelTemplate.Get(_Dataset.GetValue('LabelTemplate')) then
exit;
// Check template is License Plate Contents
if MobLabelTemplate."Template Handler" <> MobLabelTemplate."Template Handler"::"License Plate Contents" then
exit;
// Lookup source line
if _SourceRecRef.Number <> Database::"MOB License Plate Content" then exit;
_SourceRecRef.SetTable(LicensePlateContent);
WhseShipmentLine.Get(LicensePlateContent."Whse. Document No.", LicensePlateContent."Whse. Document Line No.");
// Modify the lines
_Dataset.SetValue(_LinePath + '/Col2_Label', // Set the label,
_Dataset.GetValue(_LinePath + '/Col2_Label') + ' & Cubage'); // by adding to the existing existing label
_Dataset.SetValue(_LinePath + '/Col2', // Set the value,
_Dataset.GetValue(_LinePath + '/Col2') + ' Cubage : ' + Format(WhseShipmentLine.Cubage)); // by adding to the existing existing value
end;