windows phone ListBox in two columns

希望得到一個多個列的listBox,每個單元都是ListBox的一個Item, 如下：

 

對應的xaml:

                    <Grid x:Name="LoginNoSubsPanel" Visibility="Visible">                        <ListBox x:Name="HotKeywordsListBox"                                 ItemsSource="{Binding RecommendedTopicsLeft}">                            <ListBox.ItemsPanel>                                <ItemsPanelTemplate>                                    <toolkit:WrapPanel  ItemHeight="176" ItemWidth="176"/>                                </ItemsPanelTemplate>                            </ListBox.ItemsPanel>                            <ListBox.ItemTemplate>                                <DataTemplate>                                    <Grid Margin="20,0,0,20">                                        <Grid.RowDefinitions>                                            <RowDefinition Height="Auto"/>                                            <RowDefinition Height="*"/>                                        </Grid.RowDefinitions>                                        <Image Grid.Row="0" Source="{Binding ImageSource}"                                                Height="140" Width="176" Margin="0"                                               Stretch="Uniform"/>                                        <Button Grid.Row="0" HorizontalAlignment="Center"                                                 VerticalAlignment="Center" Margin="0" Padding="0"                                                BorderThickness="0">                                            <Button.Content>                                                <Image Source="/Assets/BtnIcons/unchoose_2.png"                                                       Width="36" Height="36"/>                                            </Button.Content>                                        </Button>                                        <TextBlock Grid.Row="1" Text="{Binding KeyWords}"                                                FontSize="{StaticResource PhoneFontSizeNormal}"/>                                        <Rectangle Grid.RowSpan="2" Stroke="Gray"/>                                    </Grid>                                </DataTemplate>                            </ListBox.ItemTemplate>                        </ListBox>                    </Grid>

設定ItemsPanel, 用到了 toolkit:WrapPanel.