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readme.md

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-**[Привязка](https://github.com/kolei/OAP/blob/master/articles/t8_binding.md#привязка-binding-интерфейс-inotifypropertychanged-форматирование-значений-привязки-и-конвертеры-значений)**
+**["Элементы управления"](https://github.com/kolei/OAP/blob/master/articles/exam.md)**
 ***
-**Python**
+**C#**
 ***
-```angular2html
-import tkinter as tk #импортирую библиотеку и даю другое название
+**Class1**
+***
+```
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography.X509Certificates;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfApp1.model
+{
+    public class cars
+    {
+        public string name { get; set; }
+        public int year { get; set; }
+        public int price { get; set; }
+        public List<Carsprice> Carsprice { get; set; }
+        public List<Namecar> Namecar { get; set; }
+    }
+}
+```
+***
+**Class2**
+***
+```
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfApp1.model
+{
+    class Globals
+    {
+        public static IDataProvider dataProvider;
+        IEnumerable<Namecar> getNamecar()
+        {
+            return new Namecar[] {
+                new Namecar { title = "Toyota Trueno AE8"},
+                new Namecar { title = "Toyota Supra A80"},
+                new Namecar { title = "Nissal Skyline R34" },
+                new Namecar { title = "Nissan Silvia S15"},
+                new Namecar { title = "Toyota Camry 3.5"},
+                new Namecar { title = "Audi RS 6" },
+                new Namecar { title = "Трактор LOVOL TE354 HT"},
+                new Namecar { title = "BMW M5 F90"},
+                new Namecar { title = "BMW E36" },
+                new Namecar { title = "Daewoo Matiz" }
+            };
+        }
+        IEnumerable<Carsprice> getCarsprice()
+        {
+            return new Carsprice[] {
+                new Carsprice{title="Малая цена", priceFrom=0, priceTo=15001},
+                new Carsprice{title="Средняя цена", priceFrom = 20000, priceTo=35000},
+                new Carsprice{title="Высокая цена", priceFrom = 35001, priceTo=70000},
+            };
+        }
+    }
+}
+```
+***
+**Class3**
+***
+```
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfApp1.model
+{
+    public class Carsprice
+    {
+        public string title { get; set; }
+        public int priceFrom { get; set; }
+        public int priceTo { get; set; }
+    }
+    public class Namecar
+    {
+        public string title { get; set; }
+    }
+}
 
-class MainWindow(tk.Tk): #создаю главное окно приложения
-    def __init__(self):
-        super().__init__()
+```
+***
+**MainWindow.xaml**
+***
+```
+<Window x:Class="WpfApp1.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:WpfApp1"
+        mc:Ignorable="d"
+        Title="Иванов Валера И-21" Height="450" Width="908">
+    <Grid ShowGridLines="True">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="auto"/>
+            <RowDefinition />
+            <RowDefinition Height="auto"/>
+        </Grid.RowDefinitions>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="200"/>
+            <ColumnDefinition/>
+        </Grid.ColumnDefinitions>
 
-        self.title("Иванов Валера И-21")
-        self.geometry("300x250")
+        <!-- лого -->
+        <Image 
+        Source="./img/da.jpg" 
+        Grid.RowSpan="2" HorizontalAlignment="Right"/>
+        <DataGrid
+    Grid.Row="1"
+    Grid.Column="1"
+    CanUserAddRows="False"
+    AutoGenerateColumns="False"
+    ItemsSource="{Binding CarList}">
+            <DataGrid.Columns>
+                <DataGridTextColumn
+            Header="Название"
+            Binding="{Binding name}"/>
+                <DataGridTextColumn
+            Header="Цена"
+            Binding="{Binding price}"/>
+                <DataGridTextColumn
+            Header="Год"
+            Binding="{Binding year}"/>
+            </DataGrid.Columns>
+        </DataGrid>
+        <StackPanel 
+        Orientation="Vertical"
+        Grid.RowSpan="3"
+        VerticalAlignment="Bottom">
+            <Button 
+            x:Name="ExitButton"
+            Content="Выход" 
+            Click="ExitButton_Click"
+            Height="50"/>
+        </StackPanel>
 
-        self.text_box = tk.Entry(self) #создаю текстовое поле
-        self.text_box.pack() #размещаю текстовое поле
+        <WrapPanel
+        Orientation="Horizontal"
+        Grid.Column="1"
+        MinHeight="50">
+            <Label 
+    Content="Название:"
+    VerticalAlignment="Center"/>
 
-        self.text_block = tk.Label(self, textvariable=tk.StringVar(value=self.text_box.get()), height=30)
-        self.text_block.pack()
+            <ComboBox
+    Name="carnameFilterComboBox"
+    SelectionChanged="carnameFilterComboBox_SelectionChanged"
+    VerticalAlignment="Center"
+    MinWidth="100"
+    SelectedIndex="0"
+    ItemsSource="{Binding CarinfoList}">
+                <ComboBox.ItemTemplate>
+                    <DataTemplate>
+                        <Label
+                Content="{Binding title}"/>
+                    </DataTemplate>
+                </ComboBox.ItemTemplate>
+            </ComboBox>
+            <Label 
+Content="Цена:"
+VerticalAlignment="Center"/>
+            <ComboBox
+Name="carpriceFilterComboBox"
+SelectionChanged="carpriceFilterComboBox_SelectionChanged"
+VerticalAlignment="Center"
+MinWidth="100"
+SelectedIndex="0"
+ItemsSource="{Binding CarpriceList}">
 
-        # Привязываю значение текстового поля к переменной textvariable
-        self.text_box.configure(textvariable=self.text_block.cget("textvariable"))
+                <ComboBox.ItemTemplate>
+                    <DataTemplate>
+                        <Label 
+            Content="{Binding title}"/>
+                    </DataTemplate>
+                </ComboBox.ItemTemplate>
+            </ComboBox>
+        </WrapPanel>
+    </Grid>
+</Window>
+```
+***
+**MainWindow.xaml.cs**
+***
+```
+using System;
+using System.ComponentModel;
+using System.Windows;
+using WpfApp1.model;
 
-if __name__ == "__main__":
-    window = MainWindow()
-    window.mainloop()
+namespace WpfApp1
+{
+    /// <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("CarList"));
+        }
+        public string selectedname = "Все автомобили";
+        public Carsprice? selectedprice = null;
+
+        private IEnumerable<cars> _CarList;
+        public IEnumerable<cars> CarList
+        {
+            get
+            {
+                return _CarList
+                    .Where(c => (c.name == selectedname || selectedname == "Все автомобили"))
+                    .Where(c => (selectedprice == null || (c.price >= selectedprice.priceFrom && c.price < selectedprice.priceTo)));
+            }
+            set
+            {
+                _CarList = value;
+            }
+        }
+        public List<cars> Cars { get; set; }
+        public List<Namecar> CarinfoList { get; set; }
+        public List<Carsprice> CarpriceList { get; set; }
+        public MainWindow()
+        {
+            InitializeComponent();
+            DataContext = this;
+            Globals.dataProvider = new LocalDataProvider();
+            CarList = Globals.dataProvider.getCars();
+            CarinfoList = Globals.dataProvider.getName().ToList();
+            CarinfoList.Insert(0, new Namecar { title = "Все автомобили" });
+            CarpriceList = Globals.dataProvider.getPrice().ToList();
+        }
+
+        private void ExitButton_Click(object sender, RoutedEventArgs e)
+        {
+            Application.Current.Shutdown();
+
+        }
+
+        private void carnameFilterComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
+        {
+            selectedname = (carnameFilterComboBox.SelectedItem as Namecar).title;
+            Invalidate();
+        }
+        private void carpriceFilterComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
+        {
+            selectedprice = carpriceFilterComboBox.SelectedItem as Carsprice;
+            Invalidate();
+        }
+    }
+    interface IDataProvider
+    {
+        IEnumerable<cars> getCars();
+        IEnumerable<Namecar> getName();
+        IEnumerable<Carsprice> getPrice();
+    }
+    public class LocalDataProvider : IDataProvider
+    {
+        public IEnumerable<Namecar> getName()
+        {
+            return new Namecar[]
+            {
+                new Namecar()
+                {
+                    title="Toyota Trueno AE86"
+
+                },
+                new Namecar()
+                {
+                    title="Toyota Supra A80"
+                },
+                new Namecar()
+                {
+                    title="Nissal Skyline R34"
+                },
+                new Namecar()
+                {
+                    title="Nissan Silvia S15"
+
+                },
+                new Namecar()
+                {
+                    title="Toyota Camry 3.5"
+                },
+                new Namecar()
+                {
+                    title="Audi RS 6"
+
+                },
+                new Namecar()
+                {
+                    title="Трактор LOVOL TE354 HT"
+                },
+                new Namecar()
+                {
+                    title="BMW M5 F90"
+                },
+                new Namecar()
+                {
+                    title="BMW E36"
+                },
+                new Namecar()
+                {
+                    title="Daewoo Matiz"
+                }
+            };
+        }
+        public IEnumerable<Carsprice> getPrice()
+        {
+            return new Carsprice[]
+            {
+                new Carsprice()
+                {
+                    title="Все цены",
+                    priceFrom=0,
+                    priceTo=70000
+                },
+                new Carsprice()
+                {
+                    title="Малая цена",
+                    priceFrom=0,
+                    priceTo=15001
+
+                },
+                new Carsprice()
+                {
+                    title="Средняя цена",
+                    priceFrom=20000,
+                    priceTo=35000
+
+                },
+                new Carsprice()
+                {
+                    title="Высокая цена",
+                    priceFrom=35001,
+                    priceTo=70000
+
+                }
+            };
+        }
+        public IEnumerable<cars> getCars()
+        {
+            return new cars[] {
+                new cars {
+                price = 15000,
+                name = "Toyota Trueno AE86",
+                year = 1995,
+                },
+                new cars {
+                price = 30000,
+                name = "Toyota Supra A80",
+                year = 1996,
+                },
+                new cars {
+                price = 25000,
+                name = "Nissal Skyline R34",
+                year = 1996
+                },
+                new cars {
+                price = 20000,
+                name = "Nissan Silvia S15",
+                year = 1999,
+                },
+                new cars {
+                price = 20000,
+                name = "Toyota Camry 3.5",
+                year = 2020,
+                },
+                new cars {
+                price = 30000,
+                name = "Audi RS 6",
+                year = 2016,
+                },
+                new cars {
+                price = 66666,
+                name = "Трактор LOVOL TE354 HT",
+                year = 2024,
+                },
+                new cars {
+                price = 30000,
+                name = "BMW M5 F90",
+                year = 2019,
+                },
+                new cars {
+                price = 35000,
+                name = "BMW E36",
+                year = 2006,
+                },
+                new cars {
+                price = 20000,
+                name = "Daewoo Matiz",
+                year = 2010,
+                },
+            };
+        }
+    }
+}
+```
+***
 **Вот что получилось**
 
-![](./img/scr.png)
+![](./img/net.png)
+![](./img/net1.png)
+![](./img/net2.png)