private async void CustomerSearchBox_TextChanged()

in ContosoApp/Views/CustomerListPage.xaml.cs [77:110]

• 30 lines of code
• 9 McCabe index (conditional complexity)

        private async void CustomerSearchBox_TextChanged(AutoSuggestBox sender,
            AutoSuggestBoxTextChangedEventArgs args)
        {
            // We only want to get results when it was a user typing,
            // otherwise we assume the value got filled in by TextMemberPath
            // or the handler for SuggestionChosen.
            if (args.Reason == AutoSuggestionBoxTextChangeReason.UserInput)
            {
                // If no search query is entered, refresh the complete list.
                if (String.IsNullOrEmpty(sender.Text))
                {
                    await dispatcherQueue.EnqueueAsync(async () =>
                        await ViewModel.GetCustomerListAsync());
                    sender.ItemsSource = null;
                }
                else
                {
                    string[] parameters = sender.Text.Split(new char[] { ' ' },
                        StringSplitOptions.RemoveEmptyEntries);
                    sender.ItemsSource = ViewModel.Customers
                        .Where(customer => parameters.Any(parameter =>
                            customer.Address.StartsWith(parameter, StringComparison.OrdinalIgnoreCase) ||
                            customer.FirstName.StartsWith(parameter, StringComparison.OrdinalIgnoreCase) ||
                            customer.LastName.StartsWith(parameter, StringComparison.OrdinalIgnoreCase) ||
                            customer.Company.StartsWith(parameter, StringComparison.OrdinalIgnoreCase)))
                        .OrderByDescending(customer => parameters.Count(parameter =>
                            customer.Address.StartsWith(parameter) ||
                            customer.FirstName.StartsWith(parameter) ||
                            customer.LastName.StartsWith(parameter) ||
                            customer.Company.StartsWith(parameter)))
                        .Select(customer => $"{customer.FirstName} {customer.LastName}"); 
                }
            }
        }