使用 Itemssource 在 Flipview 上清空项目

Question

我正在尝试将一个充满图像的文件夹加载到 Flipview 中，如果该文件夹位于项目本身内，则没有问题，但如果我尝试使用不同的位置，Fliview 将加载空项目。

XAML：

<FlipView x:Name="FVtest" HorizontalAlignment="Center"  VerticalAlignment="Center" Width="750" Height="750">
    <FlipView.ItemTemplate>
        <DataTemplate>
            <Image Source="{Binding}" Stretch="UniformToFill" />               
        </DataTemplate>
    </FlipView.ItemTemplate>
</FlipView>

代码背后：

public async void Funcion (){

        var picker = new Windows.Storage.Pickers.FolderPicker()
        {
            ViewMode = Windows.Storage.Pickers.PickerViewMode.Thumbnail,
            SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.Downloads,
            SettingsIdentifier = "Setting"
        };
        picker.FileTypeFilter.Add("*");
        Windows.Storage.StorageFolder folder = await picker.PickSingleFolderAsync();
        StorageApplicationPermissions.FutureAccessList.AddOrReplace(folder.Name, folder);

        String path = folder.Path; //getting the path of a folder selected by the user
        String path2 = Directory.GetCurrentDirectory() + @"\Images"; //This one works

        FVtest.ItemsSource = Directory.GetFiles(path2); 
    }

除了最初的问题，这是一种有效的方法吗？ 提前致谢

Answer 1

一般来说，要获取所有的图片文件，我们应该添加图片FileTypeFilter，比如.png和.jpg，然后使用StorageFolder.GetFilesAsync的方法来获取所有的图片文件，然后我们就可以显示所有的图片文件了。图片。

下面是代码示例：

public async void Funcion()
{
    var picker = new Windows.Storage.Pickers.FolderPicker()
    {
        ViewMode = Windows.Storage.Pickers.PickerViewMode.Thumbnail,
        SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.Downloads,
        SettingsIdentifier = "Setting"
    };
    picker.FileTypeFilter.Add(".jpg");
    picker.FileTypeFilter.Add(".png");

    Windows.Storage.StorageFolder folder = await picker.PickSingleFolderAsync();
    StorageApplicationPermissions.FutureAccessList.AddOrReplace(folder.Name, folder);
    ObservableCollection<BitmapImage> sourceImage = new ObservableCollection<BitmapImage>();
    IReadOnlyList<StorageFile> files = await folder.GetFilesAsync();
    if (files != null)
    {
        foreach (var file in files)
        {
            var thumbnail = await file.GetThumbnailAsync(Windows.Storage.FileProperties.ThumbnailMode.PicturesView);
            BitmapImage bitmap = new BitmapImage();
            bitmap.SetSource(thumbnail);
            sourceImage.Add(bitmap);
        }
    }
    //String path = folder.Path; //getting the path of a folder selected by the user
    //String path2 = Directory.GetCurrentDirectory() + @"\Images"; //This one works

    FVtest.ItemsSource = sourceImage;
}