lab1

MainWindow

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using WpfApp2;
using WpfApp3.Class;

namespace WpfApp3
{
    public partial class MainWindow : Window
    {
        private InstrumentDataManager dataManager;
        private InstrumentFilter filter;
        private string searchFilter = "";
        private bool sortAsc = true;

        public MainWindow()
        {
            InitializeComponent();

            dataManager = new InstrumentDataManager();
            filter = new InstrumentFilter();

            FilterComboBox.Items.Add("Все");
            FilterComboBox.Items.Add("Клавишные");
            FilterComboBox.Items.Add("Струнные");
            FilterComboBox.Items.Add("Ударные");
            FilterComboBox.SelectedIndex = 0;

            UpdateInstrumentList(dataManager.GetInstruments());
        }

        private void FilterComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            string selectedFilter = (string)FilterComboBox.SelectedItem;

            if (selectedFilter == "Все")
            {
                UpdateInstrumentList(filter.FilterAll(dataManager.GetInstruments()));
            }
            else
            {
                UpdateInstrumentList(filter.FilterByType(dataManager.GetInstruments(), selectedFilter));
            }
        }
        private void SearchFilter_KeyUp(object sender, KeyEventArgs e)
        {
            searchFilter = SearchFilterTextBox.Text;
            UpdateInstrumentList(dataManager.GetInstruments());
        }

        private void RadioButtonAsc_Checked(object sender, RoutedEventArgs e)
        {
            sortAsc = true;
            UpdateInstrumentList(dataManager.GetInstruments());
        }
        private void RadioButtonDesc_Checked(object sender, RoutedEventArgs e)
        {
            sortAsc = false;
            UpdateInstrumentList(dataManager.GetInstruments());
        }
        private void UpdateInstrumentList(List<MusicalInstrument> instrumentsToDisplay)
        {
            if (!string.IsNullOrEmpty(searchFilter))
            {
                instrumentsToDisplay = instrumentsToDisplay.Where(i => i.Name.IndexOf(searchFilter, StringComparison.OrdinalIgnoreCase) >= 0 ||
                i.Type.IndexOf(searchFilter, StringComparison.OrdinalIgnoreCase) >=0 ||
                i.Brand.IndexOf(searchFilter, StringComparison.OrdinalIgnoreCase) >= 0).ToList();
            }

            if (sortAsc)
            {
                instrumentsToDisplay = instrumentsToDisplay.OrderBy(i => i.Price).ToList();
            }
            else
            {
                instrumentsToDisplay = instrumentsToDisplay.OrderByDescending(i => i.Price).ToList();
            }

            InstrumentListView.ItemsSource = instrumentsToDisplay;
        }
        private void ExitButton_Click(object sender, RoutedEventArgs e)
        {
            Application.Current.Shutdown();
        }

    }
}

Filter

using System.Collections.Generic;
using System.Linq;
using WpfApp3.Class;

namespace WpfApp2
{
    class InstrumentFilter
    {
        public List<MusicalInstrument> FilterByType(List<MusicalInstrument> instruments, string type)
        {
            return instruments.Where(i => i.Type == type).ToList();
        }

        public List<MusicalInstrument> FilterAll(List<MusicalInstrument> instruments)
        {
            return instruments;
        }
    }
}

Manager

using System.Collections.Generic;
using WpfApp3.Class;
using System.IO;
using CsvHelper;
using CsvHelper.Configuration;
using System.Linq;
using System.Globalization;
namespace WpfApp3
{
    class InstrumentDataManager
    {
        private List<MusicalInstrument> instruments;

        public InstrumentDataManager()
        {
            instruments = new List<MusicalInstrument>
            {
                new MusicalInstrument { Name = "Гитара", Type = "Струнные", Price = 300 },
                new MusicalInstrument { Name = "Барабаны", Type = "Ударные", Price = 500 },
                new MusicalInstrument { Name = "Фортепиано", Type = "Клавишные", Price = 1000 },
                new MusicalInstrument { Name = "Скрипка", Type = "Струнные", Price = 400 },
                new MusicalInstrument { Name = "Труба", Type = "Медные", Price = 600 },
            };
     
            using (var reader = new StreamReader("./data.csv"))
            using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
            {
                instruments = csv.GetRecords<MusicalInstrument>().ToList();
            }
        }

        public List<MusicalInstrument> GetInstruments()
        {
            return instruments;
        }
    }
}

MusicalInsrument

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using System.Threading.Tasks;

namespace WpfApp3.Class
{
    [DataContract]
    public class MusicalInstrument
    {
        public string Name { get; set; 
        public string Type { get; set; }
        public string Brand { get; set; }
        public double Price { get; set; } 
    }
}

<Window x:Class="WpfApp3.MainWindow"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:WpfApp3"
    mc:Ignorable="d"
    Title="Musical Store" Height="450" Width="800">
<Grid ShowGridLines="True">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="*" />
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="200"/>
        <ColumnDefinition/>
    </Grid.ColumnDefinitions>

    <Image Source="./assets/Guitar.jpg" Grid.Column="0" Grid.RowSpan="3" HorizontalAlignment="Right"/>

    <StackPanel Grid.Column="1" Orientation="Horizontal" Margin="10">
        <Label Content="Фильтр:" VerticalAlignment="Center" />
        <ComboBox x:Name="FilterComboBox" SelectionChanged="FilterComboBox_SelectionChanged" Margin="10" />
        <Label Content="Поиск:" VerticalAlignment="Center" />
        <TextBox Width="200" VerticalAlignment="Center" x:Name="SearchFilterTextBox" KeyUp="SearchFilter_KeyUp"/>
    </StackPanel>

    <StackPanel Grid.Column="1" Orientation="Vertical" Grid.Row="2" VerticalAlignment="Bottom">
        <RadioButton GroupName="Sort" Tag="1" Content="по возрастанию" Checked="RadioButtonAsc_Checked" VerticalAlignment="Center"/>
        <RadioButton GroupName="Sort" Tag="2" Content="по убыванию" Checked="RadioButtonDesc_Checked" VerticalAlignment="Center"/>
        <Button x:Name="ExitButton" Content="Выход" Click="ExitButton_Click" Height="50"/>
    </StackPanel>

    <ListView x:Name="InstrumentListView" Grid.Column="1" Grid.Row="1" Margin="10">
        <ListView.View>
            <GridView>
                <GridViewColumn Header="Название" DisplayMemberBinding="{Binding Name}" />
                <GridViewColumn Header="Тип" DisplayMemberBinding="{Binding Type}" />
                <GridViewColumn Header="Бренд" DisplayMemberBinding="{Binding Brand}" />
                <GridViewColumn Header="Цена" DisplayMemberBinding="{Binding Price}" />
            </GridView>
        </ListView.View>
    </ListView>
</Grid>

```