Override the Re-Open Appointment Method

gistfile1.txt

public delegate IEnumerable ReopenAppointmentDelegate(PXAdapter adapter);
[PXOverride]
public IEnumerable ReopenAppointment(PXAdapter adapter, ReopenAppointmentDelegate baseMethod)
{
    try
    {
        Base.FieldVerifying.AddHandler<FSAppointmentDet.qty>(CancelActualQtyUpdate);
        Base.RowDeleting.AddHandler<FSAppointmentLog>(CancelLogDeletion);
        var ret = baseMethod(adapter);
        return ret;
    }
    finally
    {
        Base.FieldVerifying.RemoveHandler<FSAppointmentDet.qty>(CancelActualQtyUpdate);
        Base.RowDeleting.RemoveHandler<FSAppointmentLog>(CancelLogDeletion);
    }
}

private void CancelLogDeletion(PXCache sender, PXRowDeletingEventArgs e)
{
    e.Cancel = true;
}

private void CancelActualQtyUpdate(PXCache sender, PXFieldVerifyingEventArgs e)
{
    var row = e.Row as FSAppointmentDet;
    e.NewValue = row.Qty;
    e.Cancel = true;
}