YeahFishyFishy/TrainingBeforeExams/PreorderWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace TrainingBeforeExams
{
    /// <summary>
    /// Interaction logic for PreorderWindow.xaml
    /// </summary>
    public partial class PreorderWindow : Window
    {
        testEntities entity;
        Preorder currentPreorder { get; set; }
        public PreorderWindow(int preodredID)
        {
            InitializeComponent();
            entity = new testEntities();
            NumIdLabel.Content = preodredID;
            var _preorderNumber = entity.Preorder.Where(x => x.IdPreorder == preodredID).Select(x => x.Number).FirstOrDefault();
            PreorderList.ItemsSource = entity.Preorder.Where(x => x.Number == _preorderNumber).ToList();
            DishBox.ItemsSource = entity.Dish.ToList();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (DishBox.SelectedValue == null)
            {
                MessageBox.Show("Выберите блюдо...");
                return;
            }
            else
            {
                int _idDish = Convert.ToInt32(DishBox.SelectedValue);
                int _preorderNum = Convert.ToInt32(NumIdLabel.Content);
                var preorderNum = entity.Preorder.Where(x => x.IdPreorder == _preorderNum).Select(x => x.Number).FirstOrDefault();
                Preorder preorder = new Preorder
                {
                    DishID = _idDish,
                    IsDone = 0,
                    Number = preorderNum
                };
                entity.Preorder.Add(preorder);
                entity.SaveChanges();
                Update(preorderNum);
            }
        }
        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            int _preorderNum = Convert.ToInt32(NumIdLabel.Content);
            var preorderNum = entity.Preorder.Where(x => x.IdPreorder == _preorderNum).Select(x => x.Number).FirstOrDefault();
            var selectedDish = currentPreorder.DishID;
            var delete = entity.Preorder.Where(x => x.DishID == selectedDish).FirstOrDefault();
            entity.Preorder.Remove(delete);
            entity.SaveChanges();
            Update(preorderNum);
        }
        private void Update(string _preorderNumber)
        {
            PreorderList.ItemsSource = null;
            PreorderList.ItemsSource = entity.Preorder.Where(x => x.Number == _preorderNumber).ToList();
        }
    }
}