public override async void OnNavigatedTo(NavigatedToEventArgs e, Dictionary <string, object> viewModelState)
{
// Get latest shopping cart
var shoppingCart = await _shoppingCartRepository.GetShoppingCartAsync();
_order = _orderRepository.CurrentOrder;
_order.ShoppingCart = shoppingCart;
// Populate the ShoppingCart items
var shoppingCartItemVMs = _order.ShoppingCart.ShoppingCartItems.Select(item => new ShoppingCartItemViewModel(item, _resourceLoader));
ShoppingCartItemViewModels = new ReadOnlyCollection <ShoppingCartItemViewModel>(shoppingCartItemVMs.ToList());
// Populate the ShippingMethods and set the selected one
var shippingMethods = await _shippingMethodService.GetShippingMethodsAsync();
ShippingMethods = new ReadOnlyCollection <ShippingMethod>(shippingMethods.ToList());
SelectedShippingMethod = _order.ShippingMethod != null?ShippingMethods.FirstOrDefault(c => c.Id == _order.ShippingMethod.Id) : null;
// Update order's address and payment information
_order.ShippingAddress = await _checkoutDataRepository.GetShippingAddressAsync(_order.ShippingAddress.Id);
_order.BillingAddress = await _checkoutDataRepository.GetBillingAddressAsync(_order.BillingAddress.Id);
_order.PaymentMethod = await _checkoutDataRepository.GetPaymentMethodAsync(_order.PaymentMethod.Id);
// Populate the CheckoutData items (Addresses & payment information)
CheckoutDataViewModels = new ObservableCollection <CheckoutDataViewModel>
{
CreateCheckoutData(_order.ShippingAddress, Constants.ShippingAddress),
CreateCheckoutData(_order.BillingAddress, Constants.BillingAddress),
CreateCheckoutData(_order.PaymentMethod)
};
base.OnNavigatedTo(e, viewModelState);
if (e.NavigationMode == NavigationMode.Refresh)
{
// Restore the selected CheckoutData manually
string selectedCheckoutData = RetrieveEntityStateValue <string>("selectedCheckoutData", viewModelState);
if (!string.IsNullOrWhiteSpace(selectedCheckoutData))
{
SelectedCheckoutData = CheckoutDataViewModels.FirstOrDefault(c => c.EntityId == selectedCheckoutData);
}
}
}