private async void BtnGetProduct_click(object sender, RoutedEventArgs e)
{
product = PurchaseConfiguration.GetProduct();
await product.GetProductInfo();
MessageBox.Show(
$"Instock:{product.ProductSkus.Where(s => s.InStock).Aggregate(string.Empty, (result, next) => result += (next.DisplaySize + ";"))}, Outstock:{product.ProductSkus.Where(s => !s.InStock).Aggregate(string.Empty, (result, next) => result += next.DisplaySize + ";")}");
}
private async void BtnLogin_click(object sender, RoutedEventArgs e)
{
var user = PurchaseConfiguration.GetUser();
await user.LoginByHttpHandler();
ApplicationContext.Current.LoginedUsers.Add(user);
await user.GetUserInfo(); // 必要步骤，否则无法在下一步中生成request cookies
await user.GetCartInfo(); // 必要步骤，获取购物车摘要的cookie。
MessageBox.Show("Login succeed!");
}