private void AdjustQuantity()
{
if (IsCreating)
{
var difference = Quantity - _item.Quantity;
var userID = CurrentUser != null ? CurrentUser.ID : 1;
var wasAdjusted = CanMarkAdjustedForStockPurchase ? WasAdjustedForStockPurchase : false;
QuantityAdjustment.UpdateQuantity(difference, _item.ID, userID, Explanation, wasAdjusted);
_item.AdjustQuantityByAmount(difference);
_item.Quantity = Quantity;
ReturnToPreviousScreen();
}
else
{
_adjustment.Explanation = Explanation;
_adjustment.WasAdjustedForStockPurchase = WasAdjustedForStockPurchase;
_adjustment.SaveUpdates();
ReturnToPreviousScreen();
}
}