使用转换器绑定UWP Image.Source

using System;
using Windows.Storage;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Media.Imaging;

namespace MyApp.Converters
{
    public class ImageSourceConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, string language)
        {
            // value为图像文件名或路径
            string fileName = value as string;

            // 使用适当的逻辑加载图像，并返回ImageSource对象
            if (!string.IsNullOrEmpty(fileName))
            {
                StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(new Uri(fileName));
                using (var stream = await file.OpenAsync(FileAccessMode.Read))
                {
                    BitmapImage image = new BitmapImage();
                    await image.SetSourceAsync(stream);
                    return image;
                }
            }

            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            throw new NotImplementedException();
        }
    }
}

<Page ...
    xmlns:converter="using:MyApp.Converters">

    <Page.Resources>
        <converter:ImageSourceConverter x:Key="ImageConverter" />
    </Page.Resources>

    <!-- 其他控件 -->

    <Image Source="{Binding FileName, Converter={StaticResource ImageConverter}}" />

    <!-- 其他控件 -->

</Page>