C# IMultiValueConverter中提到DependencyProperty的异常

我尝试在列表框中获取图像，为iMultiValueConverter提供路径，在后台线程中执行此操作：

<Image>
  <Image.Source>
    <MultiBinding Converter="{StaticResource UriToBitmapConverter}">
      <MultiBinding.Bindings>
        <Binding RelativeSource="{RelativeSource Self}" />
        <Binding Source="{Binding ImagePath}" />  
      </MultiBinding.Bindings>
    </MultiBinding>
  </Image.Source>
</Image>

我得到：

类型的未处理异常 中出现“System.Windows.Markup.XamlParseException” PresentationFramework.dll

其他信息：无法在“源”上设置“绑定” 类型为“Binding”的属性。只能在服务器上设置“绑定” DependencyObject的DependencyProperty

---

你能告诉我我做错了什么吗

您正在尝试在绑定中设置绑定：

。您是否尝试设置

？如果我这样做，我得到：错误“Binding”类型的“Path”属性上无法设置“Binding”，因此您将

替换为

，现在您得到两个错误？我通过编译得到：错误“Binding”类型的“Path”属性上无法设置“Binding”ImagePath是observablecollection中的类变量

public class UriToBitmapConverter : IMultiValueConverter 
{
    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)    
    {
        if (values[1] == null) return null;

        BitmapImage BI= null;
        Image image = values[0] as Image;
        string mypath = values[1] as string;
        FileStream fileStream = new FileStream(mypath, FileMode.Open, FileAccess.Read);

                ThreadPool.QueueUserWorkItem((WaitCallback)delegate
                {
                    image.Dispatcher.Invoke(DispatcherPriority.Normal,
                        (ThreadStart)delegate
                        {
                            BI= new BitmapImage();
                            BI.BeginInit();
                            BI.StreamSource = fileStream;
                            BI.EndInit();
                            image.Source = BI;
                        });
                });
        return BI;
    }

    public object[] ConvertBack(object value, Type[] targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new Exception("The method or operation is not implemented.");
    }
}