//add new transaction
private void btnAddTransaction_Click(object sender, EventArgs e)
{
if (lvIbansTransaction.SelectedItems.Count > 0)
{
ListViewItem item = lvIbansTransaction.SelectedItems[0];
string iban = item.SubItems[0].Text.Trim();
decimal sum;
bool evalSum = decimal.TryParse(txtTransactionSum.Text.Trim(), out sum);
string currentBalanceStr = item.SubItems[3].Text.Trim();
decimal currentBalance;
bool evalCurrentBalance = decimal.TryParse(currentBalanceStr, out currentBalance);
//both negative and positive allowed, negative = draws out money from account, positive = deposits to account
if (evalSum && evalCurrentBalance)
{
if (sum < 0 && (currentBalance + sum) < 0)
{
MessageBox.Show("You are trying to draw out too much. The current balance is " + currentBalance, "Attempt to draw out too much", MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1);
}
else
{
decimal updatedTotal = currentBalance + sum;
Tuple <int, string, string> ret = customerUtility.MakeATransaction(iban, sum, updatedTotal);
if (ret.Item1 == 1)
{
customerUtility.ReplaceTransactionAccoutInList(lvIbansTransaction, iban, updatedTotal);
txtTransactionSum.Text = "";
lvCustomersTransactions.Items.Clear();
lvSearchCustomersTransactions.SelectedItems.Clear();
MessageBox.Show(ret.Item2, ret.Item3, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
}
else
{
txtTransactionSum.Focus();
MessageBox.Show(ret.Item2, ret.Item3, MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1);
}
}
}
else
{
MessageBox.Show("Only non-empty and numeric decimal input for sum is allowed!", "Invalid Input", MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1);
txtTransactionSum.Focus();
}
}
else
{
MessageBox.Show("No iban was selected!", "No Iban selected", MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1);
}
}