/// <summary>
/// Deletes customer from database using the supplied customer ID.
/// If the customer exists, they are deleted from the database. If the customer
/// doesn't exist an exception is thrown.
/// </summary>
private void btnDelete_Click(object sender, RoutedEventArgs e)
{
try
{
if (String.IsNullOrWhiteSpace(txtCustomerID.Text))
{
throw new ArgumentNullException("No customer ID provided.");
}
// Check to see if the customer exists in the store
Customer customer = store.Find(int.Parse(txtCustomerID.Text));
// Throw new exception if customer doesn't exist, otherwise delete the customer
if (customer == null)
{
throw new Exception("Customer not found.");
}
else
{
listCustomerNames.Items.Remove(listCustomerNames.SelectedItem);
store.Delete(customer.ID);
ClearAllFields();
MessageBox.Show("Customer deleted successfully.");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
/// <summary>
/// Handles the event when the Delete button is clicked.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnDelete_Click(object sender, RoutedEventArgs e)
{
if (int.TryParse(txtCustomerId.Text, out int customerId))
{
store.Delete(customerId);
ApplyDatabinding();
ClearInputs();
}
else
{
MessageBox.Show("Please enter a valid customer id");
}
}
/// <summary>
/// Deletes the customer by ID if such a customer exists & updates customer listbox to reflect change.
/// </summary>
/// <param name="customerID">The customer identifier.</param>
private void DeleteCustomer(int customerID)
{
var foundCustomer = store.Find(customerID);
if (foundCustomer == null)
{
MessageBox.Show("No customer with entered ID found");
}
else
{
store.Delete(customerID);
MessageBox.Show($"Customer with ID {customerID} deleted.");
lstboxCustomerIDs.ItemsSource = store.IDs;
lstboxCustomerIDs.UpdateLayout();
}
}