C# WP 8.1 RT上的MapItemsControl抽头事件

我正在从事Windows Phone 8.1 RT项目，我想在点击mapcontrolSP时获取我的绑定项

    <Maps:MapControl x:Name="Map" MapServiceToken="abcdef-abcdefghijklmno">
        <Maps:MapItemsControl x:Name="mapitem" ItemsSource="{Binding}">
            <Maps:MapItemsControl.ItemTemplate>
                <DataTemplate>
                    <StackPanel x:Name="mapcontrolSP" Orientation="Horizontal" Background="Red" Tapped="ItemStckPanel">
                        <Image Source="Assets/ico-venue.png" Height="45" Width="45"
                           Maps:MapControl.Location="{Binding Geopoint}"
                           Maps:MapControl.NormalizedAnchorPoint="{Binding Anchor}"/>
                        <StackPanel VerticalAlignment="Center" HorizontalAlignment="Center" Margin="5">
                            <TextBlock FontSize="15" Foreground="White" Text="{Binding name}"/>
                            <TextBlock FontSize="15" Foreground="White" Text="{Binding address}"/>
                            <TextBlock FontSize="15" Foreground="White" Text="{Binding distance}"/>
                        </StackPanel>
                    </StackPanel>
                </DataTemplate>
            </Maps:MapItemsControl.ItemTemplate>
        </Maps:MapItemsControl>
    </Maps:MapControl>

如何获取项目？

快速解决方案：

private void ItemStckPanel(object sender, TappedRoutedEventArgs e)
{
        var stackPanel = sender as StackPanel;
        var item = stackPanel.DataContext as FsqBasicItem;
        if(item != null)
        {
            MessageDialog dialog = new MessageDialog(item.name);
            dialog.ShowAsync();
        }
}

---

又是例外。现在stackpanel为空。我使用此行绑定mapitem.ItemsSource=basicItemsList；嗯，你能给我看看代码里的样子吗？因为在我的测试解决方案中，这段代码：运行得非常好。嗯，我在emulator上检查了这段代码（不幸的是，目前还没有设备），它对我很有效。这是我的解决方案：也许你发现了什么：）你的解决方案很完美。我的FsqbasicClass不太好用。你的课对我很好。谢谢：）请随时查看，这是你想要的。我还没有找到解决办法

private void ItemStckPanel(object sender, TappedRoutedEventArgs e)
{
        var stackPanel = sender as StackPanel;
        var item = stackPanel.DataContext as FsqBasicItem;
        if(item != null)
        {
            MessageDialog dialog = new MessageDialog(item.name);
            dialog.ShowAsync();
        }
}