CreateQueryWithOptions calls system interop Com exception

Question

Ok, so I have a simple uwp application where I try to get data from KnownFolders.VideoLibrary , and to speed things up, I use indexing with QueryOptions . Oddly enough, when I first load the page, I get no errors, but when I try to drill another folder and go to the same page again, I get this Com exception

The error is of type System.Runtime.InteropServices.COMException

HRESULT error E_FAIL was returned from a call to a COM component

FillFolders method in my ViewModel **

private async Task FillUpFolders()
    {
        uint index = 0, stepSize = 5;
        //on the first load of the LibraryPage I dont get any exception
        //but on the 2nd load, I get exception on the line below.
        var VideoQuery = FileHelper.GetVideoFoldersQuery(MainFolder, 200);
        IReadOnlyList<StorageFolder> folders = await VideoQuery.GetFoldersAsync(index, stepSize);
        index += 5;
        while (folders.Count != 0)
        {
            var folderTask = VideoQuery.GetFoldersAsync(index, stepSize).AsTask();
            foreach (StorageFolder folder in folders)
            {
                var vv = new Folder
                {
                    MyStorageFolder = folder,
                    Title = folder.DisplayName,
                    Thumbnail = new BitmapImage(new Uri("ms-appx:///Assets/FolderIcon.png")),
                    MyStretch = Windows.UI.Xaml.Media.Stretch.Uniform
                };
                Source.Add(vv);
            }
            folders = await folderTask;
            index += 5;
        }
    }

Video Stream Request Method

internal static StorageFolderQueryResult GetVideoFoldersQuery(StorageFolder Folder, uint thumbnailRequestedSize)
    {
        if (videoFolderOptions is null)
        {
            videoFolderOptions = new QueryOptions(CommonFolderQuery.DefaultQuery)
            {
                IndexerOption = IndexerOption.OnlyUseIndexerAndOptimizeForIndexedProperties//check sort order later               
            };
            videoFolderOptions.SetThumbnailPrefetch(ThumbnailMode.VideosView, thumbnailRequestedSize, ThumbnailOptions.UseCurrentScale);
        }
        return Folder.CreateFolderQueryWithOptions(videoFolderOptions);
    }

github, .

https://github.com/touseefbsb/UWPStorageFolderBug

StackTrace

" Windows.Storage.StorageFolder.CreateFolderQueryWithOptions(QueryOptions queryOptions)\r\n Fluent_Video_Player.Helpers.FileHelper.GetVideoFoldersQuery( StorageFolder, UInt32 thumbnailRequestedSize)\r\n Fluent_Video_Player.ViewModels.LibraryViewModel.d__11.MoveNext( )\r\n --- , -\r\n System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess( )\r\n System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification( )\r\n System.Runtime.CompilerServices.TaskAwaiter.GetResult()\r\n Fluent_Video_Player.ViewModels.LibraryViewModel.d__9.MoveNext()\r\n --- , -\r\n System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess( )\r\n System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification( )\r\n System.Runtime.CompilerServ ices.TaskAwaiter.GetResult()\r\n Fluent_Video_Player.Views.LibraryPage.d__5.MoveNext()"

• VS 2017
• "" ( )
• ,
• .

. ConfigureAwait (false) Fill() LibraryPage.xaml.cs FillUpFolders() FillUpFiles() viewmodel, Marshall,

Answer 1

IndexerOption = IndexerOption.OnlyUseIndexerAndOptimizeForIndexedProperties

GetVideoFoldersQuery,

internal static StorageFolderQueryResult GetVideoFoldersQuery(StorageFolder Folder, uint thumbnailRequestedSize)
{
    if (videoFolderOptions is null)
    {
        videoFolderOptions = new QueryOptions(CommonFolderQuery.DefaultQuery);
        videoFolderOptions.SetThumbnailPrefetch(ThumbnailMode.VideosView, thumbnailRequestedSize, ThumbnailOptions.UseCurrentScale);
    }
    return Folder.CreateFolderQueryWithOptions(videoFolderOptions);
}

, , .

InvalidCastException GetDisplayForFile, , .

Edit

OnNavigateTo :

var    folder = KnownFolders.VideosLibrary;

// Define two different QueryOptions
var    qo_1   = new QueryOptions(CommonFolderQuery.DefaultQuery);
var    qo_2   = new QueryOptions(CommonFolderQuery.DefaultQuery)
                    {
                      IndexerOption = IndexerOption.OnlyUseIndexerAndOptimizeForIndexedProperties
                    };

// Query folder and then query the files and subfolders
// using the first QueryOptions qo_1
var    fq_1   = folder.CreateFolderQueryWithOptions ( qo_1 ) ;
var    fo_1   = await fq_1.GetFoldersAsync ( 0, 5 ) ;
foreach ( var subfold in fo_1 )
{
  var f_1  = subfold.CreateFileQueryWithOptions ( qo_1 ) ;
  var sf_1 = subfold.CreateFolderQueryWithOptions ( qo_1 ) ;
}

// Query folder and then query the files and subfolders
// using the first QueryOptions qo_2
var    fq_2   = folder.CreateFolderQueryWithOptions ( qo_2 ) ;
var    fo_2   = await fq_2.GetFoldersAsync ( 0, 5 ) ;
foreach ( var subfold in fo_2 )
{
  var f_2  = subfold.CreateFileQueryWithOptions ( qo_2 ) ;
  var sf_2 = subfold.CreateFolderQueryWithOptions ( qo_2 ) ;
}

QueryOption .

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, Microsoft. Microsoft.