[Bug] [Windows] File Picker Crashes After File Not Found

[dylandrush]

Description

When using the file picker:

    private async void OnCounterClicked(object sender, EventArgs e)
    {
        var result = await FilePicker.PickAsync();
    }

If you try to put in an invalid file, you get a File Not Found warning dialog, but now the file picker is in a broken state. Clicking on the cancel will cause it to crash, as will trying to select a valid file. Unlike in other file pickers, at this point the file name will not get over written regardless of what file you try to select.

I get the following output:

Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Private.CoreLib.dll
Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Private.CoreLib.dll
Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Private.CoreLib.dll
The program '[6764] MauiFilePickerSample.exe' has exited with code 3221226107 (0xc000027b).

Surrounding the FilePicker.PickAsync(); with a try/catch causes the program to get into a locked state with the file picker UI closing but still seeming like it has focus as you can't interact with the main UI anymore.

Linking to basic repo I found that has both multi and single file pickers. Thought the problem might be specific to something I was doing, but same behavior in demo repo I found:

https://github.com/jfversluis/MauiFilePickerSample

Steps to Reproduce

1. Open the file picker
2. In the "File name:" field, type in any non existent file
3. Click on the "Open" button
4. Click on the "OK" button in the warning dialog
5. Click on the "Cancel" button in the file picker
6. ???
7. Get the following:

Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Private.CoreLib.dll
Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Private.CoreLib.dll
Exception thrown: 'System.Runtime.InteropServices.COMException' in System.Private.CoreLib.dll
The program '[2488] MauiFilePickerSample.exe' has exited with code 3221226107 (0xc000027b).

Link to public reproduction project repository

https://github.com/jfversluis/MauiFilePickerSample

Version with bug

7.0.49

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

Windows SDK 10.0.17763.0

Did you find any workaround?

No response

Relevant log output

No response

[ghost]

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[AnnYang01]

Verified this on Visual Studio Enterprise 17.7.0 Preview 6.0 in Windows 11. This issue didn't repro on .NET 8.0 with below Project:
MauiApp8.zip
Screen recording:

[ghost]

Hi @dylandrush. We have added the "s/try-latest-version" label to this issue, which indicates that we'd like you to try and reproduce this issue on the latest available public version. This can happen because we think that this issue was fixed in a version that has just been released, or the information provided by you indicates that you might be working with an older version.

You can install the latest version by installing the latest Visual Studio (Preview) with the .NET MAUI workload installed. If the issue still persists, please let us know with any additional details and ideally a reproduction project provided through a GitHub repository.

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[dylandrush]

Does seem to be working now on Windows 10, Microsoft Visual Studio Community 2022 (64-bit) - Preview Version 17.7.0 Preview 6.0