通過組合框綁定從“收藏夾”中選擇的項目並將其綁定到圖像

Question

如何通過組合框綁定“收藏夾”中的選定項目並將其綁定到圖像？

public class ElectrodePlacementScheme
{
    public BitmapImage Image { private set; get; }
    public String Name { private set; get; }

    public ElectrodePlacementScheme(BitmapImage image, String name)
    {
        Image = image;
        Name = name;
    }
}

用戶控制：這里我通過名稱和圖像對初始化集合

public partial class CheckECGUC : UserControl
{
    public ObservableCollection<ElectrodePlacementScheme> ElectrodePlacementSchemes { get; set; }

    public CheckECGUC()
    {
        InitializeComponent();

        ElectrodePlacementSchemes = new ObservableCollection<ElectrodePlacementScheme>();
        ElectrodePlacementSchemes.Add(new ElectrodePlacementScheme(new BitmapImage(new System.Uri(@"pack://application:,,,/Images/3CH_7Leads_Option1.png")), "Option 1"));
        ElectrodePlacementSchemes.Add(new ElectrodePlacementScheme(new BitmapImage(new System.Uri(@"pack://application:,,,/Images/3CH_7Leads_Option2.png")), "Option 2"));
    }
}

xaml：在這里我嘗試將圖像綁定到組合框

<ComboBox x:Name="optionSelector" ItemsSource="{Binding ElectrodePlacementSchemes}" DisplayMemberPath="Name"/>
    <Image Source="{Binding Path=optionSelector, ElementName=SelectedItem}"/>
</ComboBox>

我在組合框項目上看到：選項1，選項2，但不能反映在圖像上：圖像不變

謝謝

Answer 1

<ComboBox x:Name="optionSelector" ItemsSource="{Binding ElectrodePlacementSchemes}" DisplayMemberPath="Name"/>
                <Image Source="{Binding SelectedItem.Image, ElementName=optionSelector}">

Answer 2

或這個：

    <ComboBox x:Name="optionSelector"
              DisplayMemberPath="Name"
              ItemsSource="{Binding ElectrodePlacementSchemes}"
              SelectedValuePath="Image" />
    <Image Source="{Binding Path=SelectedValue, ElementName=optionSelector}" />