// Bill a contract button
private void button2_Click(object sender, RoutedEventArgs e)
{
// Initialize a temporary int to then convert the textbox to it
int contractID;
try
{
int.TryParse(tbx_ContractID.Text, out contractID);
// Call the billcustomer method
CustomerDataAccess.BillCustomer(contracts, contractID);
// Refresh list logic
lbx_contracts.ItemsSource = null;
lbx_contracts.ItemsSource = contracts.ToList();
}
catch (SystemException ex)
{
MessageBox.Show(ex.ToString());
}
}
