带有GPS值的WP7动态列表框

我会尽力解释我的问题。。。抱歉把英文翻译成谷歌。

我想动态显示这些值​​在gps列表框中

我有一个股票估值的类​​gps:

public class LocationManager : INotifyPropertyChanged

另一个名称和价值：

public class GpsItem: INotifyPropertyChanged

第三类：

 public class GpsItems: ObservableCollection<GpsItem>

我的列表框，将ItemsSource作为我的第三类

ListBox.ItemsSource = new GpsItems();

xaml:

<ListBox x:Name="ListBox" Background="#BF000000" Tap="LsbAllCases_Tap">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Margin="0,0,0,10" Width="Auto" Height="Auto" Orientation="Horizontal">
                    <TextBlock Text="{Binding Name, Mode="OneWay"}" VerticalAlignment="Center" HorizontalAlignment="Left" />
                <TextBlock Text="{Binding Value, Mode="OneWay"}"  HorizontalAlignment="Right" />
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

执行中显示的值，但不是动态的。

我已经用实现了INotifyPropertyChanged接口

    // Declare the PropertyChanged event
    public event PropertyChangedEventHandler PropertyChanged;
    // NotifyPropertyChanged will raise the PropertyChanged event passing the
    // source property that is being updated.
    public void NotifyPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }

我不知道该怎么办。。。帮助提前感谢

    private string name;
    [DataMemberAttribute]
    public string Name
    {
        get { return name; }
        set
        {
            if (name != value)
            {
                name = value;
                NotifyPropertyChanged("Name");
            }
        }
    }