private void ApplyDiscount()
{
TicketDiscount result = null;
FormattedListBoxItem selectedItem =
(FormattedListBoxItem)listBoxAvailable.SelectedItem;
Discount discount = (Discount)selectedItem.ReferenceObject;
bool hasPermission = (!discount.RequiresPermission ||
SessionManager.ActiveEmployee.HasPermission(Permissions.RegisterDiscounts));
if (!hasPermission &&
(PosHelper.GetPermission(Permissions.RegisterDiscounts) == null))
{
PosDialogWindow.ShowDialog(
Types.Strings.YouDoNotHavePermissionToApplyThisDiscount,
Types.Strings.PermissionDenied);
return;
}
if (discount.Amount == null)
{
double?amount = discount.AmountIsPercentage ?
PosDialogWindow.PromptPercentage(this, Types.Strings.EnterDiscountPercentage, null) :
PosDialogWindow.PromptNumber(Types.Strings.EnterDiscountAmount, (double?)null);
if (amount != null)
{
result = TicketDiscount.Add(discount.Id, SelectedTicket.PrimaryKey,
amount.Value, SessionManager.PseudoEmployeeId);
}
}
else
{
result = TicketDiscount.Add(discount.Id, SelectedTicket.PrimaryKey,
null, SessionManager.PseudoEmployeeId);
}
if (result != null)
{
listBoxAvailable.SelectedItem = null;
listBoxAvailable.Items.Remove(selectedItem);
listBoxApplied.Items.Add(selectedItem);
listBoxApplied.SelectedItem = selectedItem;
}
}
