exTest/Test/books.xaml.cs

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Data.Entity;
using System.Diagnostics;
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.Navigation;
using System.Windows.Shapes;
using ClassLibrary1;

namespace test
{
    /// <summary>
    /// Логика взаимодействия для books.xaml
    /// </summary>
    public partial class books : Page
    {
        public int CountTakedBooks { get; set; }
        List<int> korz = new List<int>();
        ViewModel viewModel = new ViewModel();
        int totalcost = 0;
        int TotalSale = 0;

        public string op { get; set; }
        public books()
        {
            InitializeComponent();
            lb.ItemsSource = viewModel.books.ToList();
            lb.Items.Refresh();
            op = "None";
        }

        private void add_Click(object sender, RoutedEventArgs e)
        {

            try
            {
                CountTakedBooks = 0;
                Button button = (Button)sender;
                int id = Convert.ToInt32(button.Uid);
                Books books = Base.Entities.Books.FirstOrDefault(x => x.IdBook == id);

                int ss = books.CountInStock + books.CountInStore;

                if (books.CountInStock == 0 && books.CountInStore == 0)
                {
                    throw new Exception("Данной книги нет в наличии.");
                }

                books.CountInCart++;
                if (books.CountInCart > ss)
                {
                    throw new Exception("Превышен лимит товара");
                }

                korz.Add(id);

                CountTakedBooks = korz.Count;

                totalcost += Convert.ToInt32(books.Cost);

                Class1 class1 = new Class1();
                TotalSale = class1.sale(korz.Count, totalcost);


                kolbook.Text = korz.Count.ToString();
                price.Text = totalcost.ToString();
                sale.Text = TotalSale.ToString();
                if (TotalSale > 0)
                {
                    //op = "Strikethrough";
                    //PropertyChanged(this, new PropertyChangedEventArgs("op"));
                    newprice.Visibility = Visibility.Visible;
                    price.TextDecorations = TextDecorations.Strikethrough;
                }
                double ab = totalcost - (totalcost * TotalSale / 100);
                newprice.Text = Math.Floor(ab).ToString();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        public List<Books> buf3 = new List<Books>();
        public Books buf4;
        private void korz_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                foreach (int y in korz.Distinct().ToList())
                {
                    buf4 = Base.Entities.Books.FirstOrDefault(x => x.IdBook == y);
                    buf3.Add(buf4);
                }
                ChangePage.Frame.Navigate(new korzinka(buf3, TotalSale));
            }

            catch
            {
                MessageBox.Show("Ошибка");
            }
        }
    }
}