Добавить 'README.md'

README.md

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+### MusicalInstrument.cs
+```
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfApp3.Class
+{
+    [DataContract]
+    public class MusicalInstrument
+    {
+        [DataMember]
+        public string Name { get; set; }
+        [DataMember]
+        public string Type { get; set; }
+        [DataMember]
+        public string Brand { get; set; }
+        [DataMember]
+        public double Price { get; set; }
+
+        [DataMember(Name = "deliveryDate")]
+        private string? stringDate { get; set; }
+
+        [IgnoreDataMember]
+        public DateTime? deliveryDate
+        {
+            get
+            {
+                return stringDate == null ? null : DateTime.Parse(stringDate);
+            }
+            set
+            {
+                stringDate = value.ToString();
+            }
+        }
+    }
+}
+```
+### Manager.cs
+```
+using System.Collections.Generic;
+using WpfApp3.Class;
+using System.IO;
+using System.Linq;
+using System.Globalization;
+using System.Runtime.Serialization.Json;
+namespace WpfApp3
+{
+        public class JSONDataProvider
+        {
+            private List<MusicalInstrument> _instruments;
+            public JSONDataProvider()
+            {
+                var serializer = new DataContractJsonSerializer(typeof(MusicalInstrument[]));
+                using (var sr = new StreamReader("data.json"))
+                {
+                    _instruments = ((MusicalInstrument[])serializer.ReadObject(sr.BaseStream)).ToList();
+                }
+            }
+            public List<MusicalInstrument> GetInstruments()
+            {
+                return _instruments;
+            }
+        }
+}
+```
+### Filter.cs
+```
+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;
+        }
+    }
+}
+```
+### MainWindow.xaml.cs
+```
+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 JSONDataProvider dataProvider;
+        private InstrumentFilter filter;
+        private string searchFilter = "";
+        private bool sortAsc = true;
+
+        public MainWindow()
+        {
+            InitializeComponent();
+
+            dataProvider = new JSONDataProvider();
+            filter = new InstrumentFilter();
+
+            FilterComboBox.Items.Add("Все");
+            FilterComboBox.Items.Add("Клавишные");
+            FilterComboBox.Items.Add("Струнные");
+            FilterComboBox.Items.Add("Ударные");
+            FilterComboBox.SelectedIndex = 0;
+
+            UpdateInstrumentList(dataProvider.GetInstruments());
+        }
+        private void FilterComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            string selectedFilter = (string)FilterComboBox.SelectedItem;
+
+            if (selectedFilter == "Все")
+            {
+                UpdateInstrumentList(filter.FilterAll(dataProvider.GetInstruments()));
+            }
+            else
+            {
+                UpdateInstrumentList(filter.FilterByType(dataProvider.GetInstruments(), selectedFilter));
+            }
+        }
+        private void SearchFilter_KeyUp(object sender, KeyEventArgs e)
+        {
+            searchFilter = SearchFilterTextBox.Text;
+            UpdateInstrumentList(dataProvider.GetInstruments());
+        }
+
+        private void RadioButtonAsc_Checked(object sender, RoutedEventArgs e)
+        {
+            sortAsc = true;
+            UpdateInstrumentList(dataProvider.GetInstruments());
+        }
+        private void RadioButtonDesc_Checked(object sender, RoutedEventArgs e)
+        {
+            sortAsc = false;
+            UpdateInstrumentList(dataProvider.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();
+        }
+
+    }
+}
+```
+### MainWindow.xaml
+```
+<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>
+
+        <DataGrid x:Name="InstrumentListView"
+    Grid.Row="1"
+    Grid.Column="1"
+    CanUserAddRows="False"
+    AutoGenerateColumns="False"
+    ItemsSource="{Binding InstrumentListView}">
+            <DataGrid.Columns>
+                <DataGridTextColumn
+            Header="Название"
+            Binding="{Binding Name}"/>
+                <DataGridTextColumn
+            Header="Тип"
+            Binding="{Binding Type}"/>
+                <DataGridTextColumn
+            Header="Бренд"
+            Binding="{Binding Brand}"/>
+                <DataGridTextColumn
+            Header="Цена"
+            Binding="{Binding Price}"/>
+                <DataGridTextColumn
+            Header="Дата поступления"
+            Binding="{Binding deliveryDate, StringFormat={}{0:dd.MM.yyyy}}"/>
+            </DataGrid.Columns>
+        </DataGrid>
+    </Grid>
+</Window>
+```
+![](./img/изображение_2024-05-09_184410969.png)