private void bnTransactionHistory_Click(object sender, EventArgs e)
{
// XXX Transaction History button handler
while (true)
{
try
{
if (!BookShopControl.isCustomerLoggedIn)
{
throw new BookShopException("There is no customer logged in.");
}
if (BookShopControl.LoggedinCustomer.pastTransactions.Count <= 0)
{
throw new NullReferenceException("There are no past transactions.");
}
// to capture an exception from SelectedIndex/SelectedItem of listTransactionHistoryDialog
listTransactionHistoryDialog.ClearDisplayItems();
//listTransactionHistoryDialog.AddDisplayItems(null); // null is a dummy argument
foreach (Transaction tran in BookShopControl.LoggedinCustomer.pastTransactions)
{
listTransactionHistoryDialog.AddDisplayItems(tran.ToString());
}
if (listTransactionHistoryDialog.Display() == DialogReturn.Done)
{
return;
}
// Select is pressed
showTransactionDialog.ClearDisplayItems();
//showTransactionDialog.AddDisplayItems(null); // null is a dummy argument
BookShopControl.showPastCartInformation(showTransactionDialog, BookShopControl.LoggedinCustomer.pastTransactions[listTransactionHistoryDialog.SelectedIndex]);
showTransactionDialog.ShowDialog();
}
catch (BookShopException bsex)
{
MessageBox.Show(this, bsex.ErrorMessage);
return;
;
}
catch (NullReferenceException nex)
{
MessageBox.Show(this, nex.Message);
return;
}
}
}