oap_labs/WpfApp1/MainWindow.xaml.cs

using System.ComponentModel;
using System.Diagnostics;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using WpfApp2.model;


using System.IO;
using System.Runtime.Serialization.Json;
using Newtonsoft.Json;


namespace WpfApp2
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>

    public partial class MainWindow : Window, INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        private void Invalidate()
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs("SparesList"));
        }
        public string selectedDetail = "Деталь";
        public SparesPrice? selectedPrice = null;
        public string selectedType = "Тип ТС";
       
      
        private IEnumerable<Spares> _SparesList;
        public IEnumerable<Spares> SparesList
        {
            get
            {

                var res = _SparesList;
                res = res
               
                    .Where(c => (c.detail == selectedDetail || selectedDetail == "Деталь"))
                    .Where(c => (selectedPrice == null || (c.price >= selectedPrice.PriceFrom && c.price < selectedPrice.PriceTo)))
                    .Where(c => (c.type == selectedType || selectedType == "Тип ТС"));
                if (searchFilter != "")
                    res = res.Where(c => c.name.IndexOf(
                        searchFilter,
                        StringComparison.OrdinalIgnoreCase) >= 0);
                if (sortAsc) res = res.OrderBy(c => c.price);
                else res = res.OrderByDescending(c => c.price);

                return res;

            }

            set
            {
                _SparesList = value;
            }
        }
        
        public List<SparesDetail> SparesDetailList { get; set; }
        public List<SparesPrice> SparesPriceList { get; set; }
        public List<SparesType> SparesTypeList { get; set; }
        public MainWindow()
        {
            InitializeComponent();
            DataContext = this;
            Globals.dataProvider = new JSONDataProvider();
            SparesList = Globals.dataProvider.getSpares();
            SparesDetailList = Globals.dataProvider.getDetail().ToList();
            SparesDetailList.Insert(0, new SparesDetail { title = "Деталь" });
            SparesPriceList = Globals.dataProvider.getPrice().ToList();
            SparesTypeList = Globals.dataProvider.getType().ToList();
            SparesTypeList.Insert(0, new SparesType { title = "Тип ТС" });
            
        }
        public class JSONDataProvider : LocalDataProvider, IDataProvider
        {
            private List<Spares> _SparesList;

            public JSONDataProvider()
            {
                var serializer = new DataContractJsonSerializer(typeof(Spares[]));
                using (var sr = new StreamReader("./data.json"))
                {
                    _SparesList = ((Spares[])serializer.ReadObject(sr.BaseStream)).ToList();
                }
            }
           
            public IEnumerable<Spares> getSpares()
                {
                    return _SparesList;
                }
            }
            private bool sortAsc = true;

        private void RadioButton_Checked(object sender, RoutedEventArgs e)
        {
            sortAsc = (sender as RadioButton).Tag.ToString() == "1";
            Invalidate();
        }

        private void ExitButton_Click(object sender, RoutedEventArgs e)
        {
            Application.Current.Shutdown();

        }

        private void DetailFilterComboBox_SelectionChanged_1(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            selectedDetail = (DetailFilterComboBox.SelectedItem as SparesDetail).title;
            Invalidate();
        }
        private void PriceFilterComboBox_SelectionChanged_2(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            selectedPrice = PriceFilterComboBox.SelectedItem as SparesPrice;
            Invalidate();
        }
        private void TypeFilterComboBox_SelectionChanged_3(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            selectedType = (TypeFilterComboBox.SelectedItem as SparesType).title;
            Invalidate();
        }
        private string searchFilter = "";

        private void SearchFilter_KeyUp(object sender, KeyEventArgs e)
        {
            searchFilter = SearchFilterTextBox.Text;
            Invalidate();
        }

    }
   

        interface IDataProvider
    {
        IEnumerable<Spares> getSpares();
        IEnumerable<SparesDetail> getDetail();
        IEnumerable<SparesPrice> getPrice();
        IEnumerable<SparesType> getType();
    }

    public class LocalDataProvider : IDataProvider
    {
        public IEnumerable<SparesDetail> getDetail()
        {
            return new SparesDetail[]
            {
                new SparesDetail()
                {
                    title="Двигатель"
                },
                new SparesDetail()
                {
                    title="КПП"
                },
                new SparesDetail()
                {
                    title="Подвеска"
                },
                new SparesDetail()
                {
                    title="Стекла"
                },
                new SparesDetail()
                {
                    title="Колеса"
                },
            };
        }
        public IEnumerable<SparesPrice> getPrice()
        {
            return new SparesPrice[]
            {
                new SparesPrice()
                {
                    title="Все цены",
                    PriceFrom=0,
                    PriceTo=99999999

                },
                new SparesPrice()
                {
                    title="БУ",
                    PriceFrom=0,
                    PriceTo=10000

                },
                new SparesPrice()
                {
                    title="Дешевая",
                    PriceFrom=10000,
                    PriceTo=20000

                },
                new SparesPrice()
                {
                    title="Средняя",
                    PriceFrom=20000,
                    PriceTo=50000

                },
                new SparesPrice()
                {
                    title="Элитная",
                    PriceFrom=50000,
                    PriceTo=99999999
                }

            };

        }
        public IEnumerable<SparesType> getType()
        {
            return new SparesType[]
            {
                new SparesType()
                {
                    title="Легкая"
                },
                new SparesType()
                {
                    title="Грузовая"
                },
            };
        }
       public IEnumerable<Spares> getSpares()
        {
            return new Spares[]{
            new Spares{
                type="Легкая",
                name="Двигатель МБ140(ОК2281.4)",
                price = 72000,
                detail="Двигатель"},
            new Spares{
                type="Легкая",
                name="КПП 5-СТ РС-ПДР",
                price = 20000,
                detail="КПП"},
            new Spares{
                type="Грузовая",
                name="Подвеска ПДРС1337",
                price = 15000,
                detail="Подвеска"},
             new Spares{
                type="Легкая",
                name="Шина 15-Р",
                price = 3000,
                detail="Колеса"},
              new Spares{
                type="Грузовая",
                name="Лобовое стекло СТ150",
                price = 40000,
                detail="Стекла"},

        };
        }
    }
    
}