ShabaninModulekz/modulekz/Cart.xaml

<Page x:Class="modulekz.Cart"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:local="clr-namespace:modulekz"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="Cart">


    <Page.Resources>
        <DataTemplate x:Key="Book">
            <Border BorderBrush="Black" BorderThickness="1" MaxWidth="400" MinWidth="400">
                <StackPanel Orientation="Horizontal">
                    <Image Width="120" Source="{Binding Img}" Margin="10 0 10 0"/>
                    <StackPanel Orientation="Vertical">
                        <TextBlock Text="Название: ">
                            <Run Text="{Binding Title}"/>
                        </TextBlock>
                        <TextBlock Text="Автор: ">
                            <Run Text="{Binding Author}"/>
                        </TextBlock>
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="Количество: "/>
                            <Button x:Name="del" Content="↓" Click="del_Click" Uid="{Binding Id}"/>
                            <TextBlock x:Name="inc" Text="{Binding inc}"/>
                            <Button x:Name="add" Content="↑" Click="add_Click" Uid="{Binding Id}"/>
                        </StackPanel>

                        <TextBlock Text="Цена: "/>
                        <TextBlock Text="{Binding Cost}" TextDecorations="{Binding decor}"/>
                        <TextBlock Text="{Binding NewPrice}" />


                    </StackPanel>
                    <Button x:Name="Delet" Content="Удалить" Click="Delet_Click" Uid="{Binding Id}"/>
                </StackPanel>
            </Border>
        </DataTemplate>
    </Page.Resources>

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="60"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <StackPanel Orientation="Horizontal">
            <Button x:Name="Back" Content="Назад" Click="Back_Click" Width="70" Height="50"/>
            <Button x:Name="Clear" Content="Очистить" Click="Clear_Click" Width="70" Height="50"/>
            <Button x:Name="Buy" Content="Купить"  Click="Buy_Click" Width="70" Height="50"/>
        </StackPanel>
        <ListBox x:Name="ListBook" ItemTemplate="{StaticResource Book}"  Grid.Row="2"/>
    </Grid>
</Page>