Cafe/Cafe2/AddWindows/AddOrderWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using Cafe.ElementsWindows;

namespace Cafe.AddWindows
{
    public partial class AddOrderWindow : Window
    {
        public AddOrderWindow()
        {
            InitializeComponent();
            DishesBox.ItemsSource = Connection.db.Dishes.Select(item => item.Name).ToList();
            TablesBox.ItemsSource = Connection.db.Tables.Select(item => item.ID).ToList();
        }

        private void DeliteDishClick(object sender, RoutedEventArgs e)
        {
            DishesList.Items.Remove((Dishes)DishesList.SelectedItem);
        }

        private void DishesListSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            int idDish = Connection.db.Dishes.Where(item => item.ID == ((Dishes)DishesList.SelectedItem).ID).Select(item => item.ID).FirstOrDefault();
            DishWindow dishWindow = new DishWindow(idDish);
            dishWindow.Show();
            this.Close();
        }

        private void AddDishClick(object sender, RoutedEventArgs e)
        {
            if (DishesBox.SelectedItem == null)
            {
                ErrorWindow errorWindow = new ErrorWindow("не выбрано блюдо");
                errorWindow.Show();
                return;
            }

            Dishes dish = Connection.db.Dishes.Where(item => item.Name == DishesBox.SelectedItem.ToString()).FirstOrDefault();
            DishesList.Items.Add(dish);

            SumOfOrder.Content = Convert.ToString(Convert.ToDecimal(SumOfOrder.Content) + dish.Price);
        }

        private void ToOrderClick(object sender, RoutedEventArgs e)
        {
            if (DishesList.Items == null)
            {
                ErrorWindow errorWindow = new ErrorWindow("не выбрано ни одного блюда");
                errorWindow.Show();
                return;
            }

            if (TablesBox.SelectedItem == null)
            {
                ErrorWindow errorWindow = new ErrorWindow("не выбран столик");
                errorWindow.Show();
                return;
            }

            Exchange exchange = GetExchange();

            if (exchange is null)
            {
                ErrorWindow errorWindow = new ErrorWindow("сейчас нет смены");
                errorWindow.Show();
                return;
            }

            int idTable = Convert.ToInt32(TablesBox.SelectedItem.ToString());

            Orders order = new Orders()
            {
                IDEmployeeExchange = Connection.db.EmployeesExchanges.Where(item => item.IDExchange == exchange.ID && item.IDEmployee == User.IDUser).Select(item => item.ID).FirstOrDefault(),
                IDTable = Connection.db.Tables.Where(item => item.ID == idTable).Select(item => item.ID).FirstOrDefault(),
                Time = DateTime.Now,
                SumOfOrder = Convert.ToDecimal(SumOfOrder.Content),
                IsPaid = false,
                IsReady = false
            };

            Connection.db.Orders.Add(order);
            Connection.db.SaveChanges();

            int idOrder = Connection.db.Orders.Select(item => item.ID).ToList().Last();
            foreach (var item in DishesList.Items)
            {
                OrderDishes orderDishes = new OrderDishes()
                {
                    IDOrder = idOrder,
                    IDDish = ((Dishes)item).ID
                };

                Connection.db.OrderDishes.Add(orderDishes);
                Connection.db.SaveChanges();
            }

            MainWindow mainWindow = new MainWindow();
            mainWindow.Show();
            this.Close();
        }

        private Exchange GetExchange()
        {
            DateTime now = DateTime.Now;

            return Connection.db.Exchange.Where(item => item.Date == now.Date && item.TimeOfBegin <= now.TimeOfDay && item.TimeOfEnd >= now.TimeOfDay).FirstOrDefault();
        }

        private void BackButtonClick(object sender, RoutedEventArgs e)
        {
            MainWindow mainWindow = new MainWindow();
            mainWindow.Show();
            this.Close();
        }
    }
}