private void DisplayRevenueByCategory()
        {
            SeriesCollection series     = new SeriesCollection();
            List <Category>  categories = CategoriesDAO.GetCategories();

            categories = categories.Skip(1).ToList();

            List <CartItem> cartItems = new List <CartItem>();

            foreach (var order in orders)
            {
                cartItems.AddRange(order.CartItems);
            }


            foreach (var category in categories)
            {
                long value = 0;

                foreach (var cartItem in cartItems)
                {
                    if (cartItem.Cake.Category.Id == category.Id)
                    {
                        value += cartItem.TotalPrice;
                    }
                }

                PieSeries pieSeries = new PieSeries
                {
                    Title  = category.Name,
                    Values = new ChartValues <long> {
                        value
                    },
                    DataLabels = true,
                    LabelPoint = PointLabel
                };
                series.Add(pieSeries);
            }

            revenueByCategoryPie.Series = series;
        }
        private void DisplayDetail()
        {
            cake = CakesDAO.GetById(idCake);

            var folder            = AppDomain.CurrentDomain.BaseDirectory;
            var pathImageAbsolute = $"{folder}\\Assets\\Images\\Uploads\\{cake.Image_Main}";

            imageUploadImage.Source = new BitmapImage(new Uri(pathImageAbsolute, UriKind.Absolute));

            categories = CategoriesDAO.GetCategories();

            categoryComboBox.ItemsSource = categories;

            categoryComboBox.SelectedIndex = categories.FindIndex(item => item.Id == cake.Category.Id);

            imageUploadImage.Tag = cake.Image_Main;

            nameImage = cake.Image_Main;

            this.DataContext = cake;
        }