private void Account_Overdrawn(object sender, OverDrawnArgs e)
{
// Get the account.
BankAccount account = sender as BankAccount;
// Ask the user whether to allow this.
if (MessageBox.Show("Insufficient funds.\n\n Current balance: " +
account.Balance.ToString("C") + "\n Debit amount: " +
e.DebitAmount.ToString("C") + "\n\n" +
"Do you want to allow this transaction anyway?",
"Allow?", MessageBoxButtons.YesNo, MessageBoxIcon.Question)
== DialogResult.Yes)
{
// Allow the transaction anyway.
e.allow = true;
}
}
public void Debit(decimal amount)
{
if (amount < 0)
{
throw new ArgumentOutOfRangeException("Debit amount must be positive.");
}
if (Balance >= amount)
{
Balance -= amount;
}
else
{
if (Overdrawn != null)
{
OverDrawnArgs args = new OverDrawnArgs();
args.DebitAmount = amount;
Overdrawn(this, args);
}
}
}
