public static void LogTransaction(string cardNumber, decimal amount)
{
var context = new ATMEntities();
context.TransactionHistories.Add(new TransactionHistory()
{
CardNumber = cardNumber,
TransactionDate = DateTime.Now,
Amount = amount
});
context.SaveChanges();
}
public static void Main(string[] args)
{
var context = new ATMEntities();
var account = context.CardAccounts.FirstOrDefault();
var pin = account.CardPIN;
var cardNumber = account.CardNumber;
var requestedAmount = 1000;
WithdrawMoney(account, pin, cardNumber, requestedAmount);
context.SaveChanges();
}
public static void WithdrawMoney(CardAccount account, string pin, string cardNumber, decimal requestedAmount)
{
var context = new ATMEntities();
var transaction = context.Database.BeginTransaction();
if (!CardNumberAndPinAreValid(account, pin, cardNumber))
{
transaction.Rollback();
throw new InvalidOperationException("Card PIN and number are invalid!");
}
if (!CardAmountIsEnough(account, requestedAmount))
{
transaction.Rollback();
throw new InvalidOperationException("Not enough amount!");
}
account.CardCash -= requestedAmount;
LogTransaction(cardNumber, requestedAmount);
transaction.Commit();
Console.WriteLine("Withdrawal complete.");
}