wp8将每个数据透视项绑定到不同的列表

我已经用Pivot控件创建了WP8应用程序。有5个数据透视项，其中3个应绑定到3个列表或一个具有不同筛选数据的列表。如何做到这一点？

XAML:

<phone:Pivot Name="PControl" Grid.Row="1" Style="{StaticResource PivotStyle}">
                <phone:PivotItem>
                    <phone:PivotItem.Header>
                        <Grid Height="80">
                            <TextBlock Text="offer" FontSize="45" Height="80" />
                        </Grid>
                    </phone:PivotItem.Header>
                    <phone:LongListSelector Margin="0,0,0,0" ItemsSource="{Binding lstOffer}">
                        <phone:LongListSelector.ItemTemplate>
                            <DataTemplate>
                                <StackPanel Margin="0,0,0,17">
                                    <TextBlock Text="some binding" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource TextBlockMnuTekst}"/>
                                </StackPanel>
                            </DataTemplate>
                        </phone:LongListSelector.ItemTemplate>
                    </phone:LongListSelector>
                </phone:PivotItem>
  </phone:Pivot>
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<phone:PivotItem>
                    <phone:PivotItem.Header>
                        <Grid Height="80">
                            <TextBlock Text="services" FontSize="45" Height="80" />
                        </Grid>
                    </phone:PivotItem.Header>
                    <phone:LongListSelector Margin="0,0,0,0" ItemsSource="{Binding lstServices}">
                        <phone:LongListSelector.ItemTemplate>
                            <DataTemplate>
                                <StackPanel Margin="0,0,0,17">
                                    <TextBlock Text="some binding" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource TextBlockMnuTekst}"/>
                                </StackPanel>
                            </DataTemplate>
                        </phone:LongListSelector.ItemTemplate>
                    </phone:LongListSelector>
                </phone:PivotItem>

C#：

public class clsPivotData
    {
        public string Name { get; set; }
        public List<clsPivotItemList> PivotItemList { get; set; }
        public clsPivotData()
        {
            PivotItemList = new List<clsPivotItemList>();
        }
    }
    public class clsPivotItemList
    {
        public string id { get; set; }
        public string ssubname { get; set; }
        public string visible { get; set; }
        public string icon { get; set; }
        public string itemType { get; set; }
        public string url { get; set; }
        public string desc { get; set; }
    }
    
    public partial class MainPage : PhoneApplicationPage
    {
        public ObservableCollection<clsPivotData> Items { get; set; }
        public static MainPage CurrentMainPage;
        public List<clsPivotData> lstOffer { get; set; }
        public List<clsPivotData> lstServices { get; set; }
        public List<clsPivotData> lstInfo { get; set; }
        // Constructor
        public MainPage()
        {
            InitializeComponent();
            CurrentMainPage = this;
            // Set the data context of the listbox control to the sample data
            DataContext = App.ViewModel;
            lstOffer = new List<clsPivotData>(from i in Items where i.Name == "offer" select i);
            lstServices = new List<clsPivotData>(from i in Items where i.Name == "services" select i);
            lstInfo = new List<clsPivotData>(from i in Items where i.Name == "info" select i);
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我在lstOffer和lstServices中得到了正确的数据，但没有显示加载数据，这不是问题所在。我不知道如何将LongListSelector中的TextBlock(Text=某种绑定(绑定到属性ssubname，它是clsPivotItemList类的属性，List是clsPivetData类的属性。

<Grid Datacontext="{Binding lstOffer }">
<phone:LongListSelector Margin="0,0,0,0" ItemsSource="{Binding PivotItemList }">
                        <phone:LongListSelector.ItemTemplate>
                            <DataTemplate>
                                <StackPanel Margin="0,0,0,17">
                                    <TextBlock Text="{Binding ssubname}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource TextBlockMnuTekst}"/>
                                </StackPanel>
                            </DataTemplate>
                        </phone:LongListSelector.ItemTemplate>
                    </phone:LongListSelector>
</Grid>

public ObservableCollection<clsPivotData> Items { get; set; }
        
public ObservableCollection<clsPivotData> lstOffer { get; set; }
public ObservableCollection<clsPivotData> lstServices { get; set; }
public ObservableCollection<clsPivotData> lstInfo { get; set; }
// Constructor
  public MainViewModel()
  {
    this.Items = new ObservableCollection<clsPivotData>();
    LoadData();
    lstOffer = Items.Where(o => o.Name == "offer").FirstOrDefault().PivotItems;
    lstServices = Items.Where(o => o.Name == "service").FirstOrDefault().PivotItems;
    lstInfo = Items.Where(o => o.Name == "info").FirstOrDefault().PivotItems;    }

<ListBox Margin="0,0,0,0" ItemsSource="{Binding lstOffer}">
    <ListBox.ItemTemplate>
        <DataTemplate>
             <ItemsControl>
                  <StackPanel Margin="0,0,0,17">
                       <TextBlock Text="{Binding ssubname}" TextWrapping="Wrap" Margin="12,0,12,0" Style="{StaticResource TextBlockMnuTekst30}"/>
                  </StackPanel>
              </ItemsControl>
        </DataTemplate>
   </ListBox.ItemTemplate>
  </ListBox>
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