WPF中的DataTemplate

<Window x:Class="DateTemplate应用.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:DateTemplate应用"
        xmlns:collections="clr-namespace:System.Collections;assembly=mscorlib"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <!--DataTemplate-->
        <DataTemplate DataType="{x:Type local:Unit}">
            <Grid>
                <StackPanel Orientation="Horizontal">
                    <Grid>
                        <Rectangle Stroke="Yellow" Fill="Orange" Width="{Binding Price}"/>
                        <TextBox Text="{Binding Year}"/>
                    </Grid>
                    <TextBlock Text="{Binding Price}" Margin="5,0"/>
                </StackPanel>
            </Grid>
        </DataTemplate>
        <!--数据源-->
        <collections:ArrayList x:Key="ds">
            <local:Unit Year="2001" Price="100"/>
            <local:Unit Year="2002" Price="120"/>
            <local:Unit Year="2003" Price="140"/>
            <local:Unit Year="2004" Price="160"/>
            <local:Unit Year="2006" Price="180"/>
            <local:Unit Year="2008" Price="200"/>
        </collections:ArrayList>
    </Window.Resources>
    <StackPanel>
        <ListBox ItemsSource="{StaticResource ds}"/>
        <ComboBox ItemsSource="{StaticResource ds}"/>
    </StackPanel>
</Window>