列出数据绑定

我试图显示有关汽车列表的信息。该列表存储在CarLibrary中，我无法获取要在相应标题下方显示的信息。

这是我的 xaml：

        <TabItem Header="Overview">
            <Grid>
                <ListView Margin="10" ItemsSource="{Binding CarLibrary}">
                    <ListView.View>
                        <GridView>
                            <GridViewColumn Header="Picture" Width="100" DisplayMemberBinding="{Binding PicturePath}"/>
                            <GridViewColumn Header="Year" Width="100" DisplayMemberBinding="{Binding Year}"/>
                            <GridViewColumn Header="Make" Width="100" DisplayMemberBinding="{Binding Make}"/>
                            <GridViewColumn Header="Model" Width="100" DisplayMemberBinding="{Binding Model}"/>
                        </GridView>
                    </ListView.View>
                </ListView>
            </Grid>
        </TabItem>

以下是 c# 中视图模型的相关代码，每个 Car 对象都具有 Make、Model、Year 和 PicturePath 的属性：

namespace CarApp
{
public class Carvm : INotifyPropertyChanged
{
    private CarLib carLibrary;
    public CarLib CarLibrary
    {
        get { return carLibrary; }
        set
        { 
            carLibrary = value;
            NotifyPropertyChanged("CarLibrary");
        }
    }
    public Carvm()
    {
        carLibrary = new CarLib();
        newCar = new Car();
        currentCar = new Car();
        rmCommand = new DeleteCommand(carLibrary);
        touchCommand = new AddCommand(carLibrary, newCar);
        //load list from disk on startup
        carLibrary.ReadList();
    }
    public event PropertyChangedEventHandler PropertyChanged;
    protected void NotifyPropertyChanged(String info)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(info));
        }
    }
}
}

这是CarLib：

namespace CarApp
{
public class CarLib : INotifyPropertyChanged
{
    private ObservableCollection<Car> list;
    public ObservableCollection<Car> List 
    {
        get { return list; }
        set {
            list = value;
            NotifyPropertyChanged("List");
        }
    }
    public CarLib()
    {
        List = new ObservableCollection<Car>();
    }
    /// <summary>
    /// Deserializes list of cars and returns the list to user
    /// </summary>
    public void ReadList()
    {
        //create local list to hold data
        ObservableCollection<Car> carList = new ObservableCollection<Car>();
        try
        {
            using (Stream stream = File.Open("data.bin", FileMode.OpenOrCreate))
            {
                BinaryFormatter bin = new BinaryFormatter();

                try
                {
                    //point List to deserialized stream
                    List = (ObservableCollection<Car>)bin.Deserialize(stream);
                }
                catch (SerializationException)
                {
                    Console.WriteLine("The list is empty.");
                }
            }
        }
        catch (SerializationException e)
        {
            if (e.Source != null)
            {
                Console.WriteLine("Empty List");
            }
        }
    }
    /// <summary>
    /// Serialize list supplied by the user and write to disk
    /// </summary>
    public void WriteList()
    {
        try
        {
            using (Stream stream = File.Open("data.bin", FileMode.Create))
            {
                BinaryFormatter bin = new BinaryFormatter();
                //write list to disk
                bin.Serialize(stream, List);
            }
        }
        catch (IOException)
        {
            Console.WriteLine("Empty List");
        }
    }
    public event PropertyChangedEventHandler PropertyChanged;
    protected void NotifyPropertyChanged(String info)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(info));
        }
    }
}
}

public ObservableCollection<Car> CarLibrary {get; set;}

CarLibrary = new CarLib().ReadList().ToObservable();