Multi-market examples

public IEnumerable<IMarket> GetAvailableMarkets() {
  var marketService = ServiceLocator.Current.GetInstance<IMarketService>();
  // Get all available markets.
  return marketService.GetAllMarkets();
}

public IMarket GetCurrentMarket() {
  var currentMarketService = ServiceLocator.Current.GetInstance<ICurrentMarket>();
  // Get the current market.
  return currentMarketService.GetCurrentMarket();
}

public void SetCurrentMarket(MarketId marketId) {
  var currentMarketService = ServiceLocator.Current.GetInstance<ICurrentMarket>();
  // Set the current market.
  currentMarketService.SetCurrentMarket(marketId);
}

public Price GetSalePrice(Entry entry, decimal quantity) {
  var currentMarketService = ServiceLocator.Current.GetInstance<ICurrentMarket>();
  var currentMarket = currentMarketService.GetCurrentMarket();
  var currency = currentMarket.DefaultCurrency;
  List<CustomerPricing> customerPricing = new List<CustomerPricing>();
  customerPricing.Add(CustomerPricing.AllCustomers);

  var principal = PrincipalInfo.CurrentPrincipal;
  if (principal != null) {
    if (!string.IsNullOrEmpty(principal.Identity.Name)) {
      customerPricing.Add(new CustomerPricing(CustomerPricing.PriceType.UserName, principal.Identity.Name));
    }

    CustomerContact currentUserContact = principal.GetCustomerContact();
    if (currentUserContact != null && !string.IsNullOrEmpty(currentUserContact.EffectiveCustomerGroup)) {
      customerPricing.Add(new CustomerPricing(CustomerPricing.PriceType.PriceGroup, currentUserContact.EffectiveCustomerGroup));
    }
  }

  IPriceService priceService = ServiceLocator.Current.GetInstance<IPriceService>();
  PriceFilter filter = new PriceFilter() {
    Quantity = quantity,
      Currencies = new Currency[] {
        currency
      },
      CustomerPricing = customerPricing
  };

  // Return the lowest price value.
  IPriceValue priceValue = priceService.GetPrices(currentMarket.MarketId, DateTime.UtcNow, new CatalogKey(entry.ID), filter)
    .OrderBy(pv => pv.UnitPrice)
    .FirstOrDefault();

  if (priceValue != null) {
    return new Mediachase.Commerce.Catalog.Objects.Price(priceValue.UnitPrice);
  }

  return null;
}

public Price GetDiscountPrice(ContentReference contentLink, Currency currency) {
  var currentMarketService = ServiceLocator.Current.GetInstance<ICurrentMarket>();
  var promotionEngine = ServiceLocator.Current.GetInstance<IPromotionEngine>();
  var market = currentMarketService.GetCurrentMarket();
  return promotionEngine.GetDiscountPrices(contentLink, market, currency).First().DiscountPrices.OrderBy(p => p.Price).First().Price;
}