public void Credit(int accountNumber, decimal amount)
{
m_AccountsDataSet.Clear();
m_Adapter.Fill(m_AccountsDataSet, "BankAccounts");
AccountsDataSet.BankAccountsDataTable accounts = m_AccountsDataSet.BankAccounts;
AccountsDataSet.BankAccountsRow account = accounts.FindByNumber(accountNumber);
account.Balance += amount;
m_Adapter.Update(accounts);
}
public void Debit(int accountNumber, decimal amount)
{
m_AccountsDataSet.Clear();
m_Adapter.Fill(m_AccountsDataSet, "BankAccounts");
AccountsDataSet.BankAccountsDataTable accounts = m_AccountsDataSet.BankAccounts;
AccountsDataSet.BankAccountsRow account = accounts.FindByNumber(accountNumber);
if (account.Balance >= amount)
{
account.Balance -= amount;
}
else
{
//Aborts the transaction as well
throw new InvalidOperationException("Debit amount is greater than balance in account #" + accountNumber);
}
m_Adapter.Update(accounts);
}