public ReceiptItem AddItemByPrice(double price)
{
var tax_amount = price * DefaultTaxAmount;
var item = new ReceiptItem
{
ItemID = Guid.NewGuid(),
ItemName = "",
Price = price,
Tax = tax_amount,
};
Items.Add(item);
PropertyChanged?
.Invoke(this,
new PropertyChangedEventArgs("SubTotal"));
PropertyChanged?
.Invoke(this,
new PropertyChangedEventArgs("TotalTax"));
PropertyChanged?
.Invoke(this,
new PropertyChangedEventArgs("Total"));
return(item);
}
public void RemoveItem(ReceiptItem item)
{
Items.Remove(item);
}