private async void bUpdate_Click(object sender, RoutedEventArgs e)
{
OrderModel selectedOrder = (cOrder.SelectedItem as Tuple<OrderModel, string>).Item1;
OrderState orderState = (OrderState)cState.SelectedItem;
CustomerOrderServiceClient customerOrderClient = new CustomerOrderServiceClient();
await customerOrderClient.ChangeOrderStateAsync(new OrderKeyModel
{
CustomerId = selectedOrder.CustomerId,
ProductCode = selectedOrder.ProductCode,
OrderDate = selectedOrder.OrderDate
}, orderState);
}
