Error HRESULT E_FAIL has been returned from a call to a COM component when Windows.Storage.Pickers is using.

[LeftTwixWand]

Describe the bug

When I'm trying to use FileSavePicker or FileOpenPicker from the Windows.Storage.Pickers namespace - get this error:
Error HRESULT E_FAIL has been returned from a call to a COM component

Steps to reproduce the bug:

1. Create an empty ProjectReunion solution
2. Try to call FilePicker window:

  FileSavePicker fileSavePicker = new FileSavePicker();
  var file = await fileSavePicker.PickSaveFileAsync();

Screenshots

Version Info

NuGet package version:
Microsoft.ProjectReunion 0.5.6

Windows 10 version	Saw the problem?
Insider Build (xxxxx)
May 2020 Update (19041)	Yes
November 2019 Update (18363)
May 2019 Update (18362)
October 2018 Update (17763)

[andrewleader]

Hi @LeftTwixWand, thanks for reporting this.

This is a dupe of #466, you have to call an InitializeWithWindow API before calling the FilePicker from desktop MSIX apps (this is needed to link the APIs to your HWND, and is by-design and not a bug).

 public sealed partial class MainWindow : Window
 {
      ...

        private async void myButton_Click(object sender, RoutedEventArgs e)
        {
            var filePicker = new FileOpenPicker();

            //Get the Window's HWND
            var hwnd = this.As<IWindowNative>().WindowHandle;

            //Make folder Picker work in Win32

            var initializeWithWindow = filePicker.As<IInitializeWithWindow>();
            initializeWithWindow.Initialize(hwnd);
            filePicker.FileTypeFilter.Add("*");

            var folder = await filePicker.PickSingleFileAsync();
            myText.Text = folder != null ? folder.Path : string.Empty;
        }

        [ComImport]
        [Guid("3E68D4BD-7135-4D10-8018-9FB6D9F33FA1")]
        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        public interface IInitializeWithWindow
        {
            void Initialize(IntPtr hwnd);
        }
        [ComImport]
        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        [Guid("EECDBF0E-BAE9-4CB6-A68E-9598E1CB57BB")]
        internal interface IWindowNative
        {
            IntPtr WindowHandle { get; }
        }
...
}

In the future, we could do some new feature work to eliminate this requirement and make the APIs work more straightforward (there's a pending ask for new file/folder picker APIs #88). But this pattern is required for a few Windows 10 APIs like secondary tiles. I'd suggest upvoting and commenting on #88 if you're interested in an improved API! Thanks!

[LeftTwixWand]

Thank You so much!

[cody3b]

Hi @LeftTwixWand, thanks for reporting this.

This is a dupe of #466, you have to call an InitializeWithWindow API before calling the FilePicker from desktop MSIX apps (this is needed to link the APIs to your HWND, and is by-design and not a bug).

 public sealed partial class MainWindow : Window
 {
      ...

        private async void myButton_Click(object sender, RoutedEventArgs e)
        {
            var filePicker = new FileOpenPicker();

            //Get the Window's HWND
            var hwnd = this.As<IWindowNative>().WindowHandle;

            //Make folder Picker work in Win32

            var initializeWithWindow = filePicker.As<IInitializeWithWindow>();
            initializeWithWindow.Initialize(hwnd);
            filePicker.FileTypeFilter.Add("*");

            var folder = await filePicker.PickSingleFileAsync();
            myText.Text = folder != null ? folder.Path : string.Empty;
        }

        [ComImport]
        [Guid("3E68D4BD-7135-4D10-8018-9FB6D9F33FA1")]
        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        public interface IInitializeWithWindow
        {
            void Initialize(IntPtr hwnd);
        }
        [ComImport]
        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        [Guid("EECDBF0E-BAE9-4CB6-A68E-9598E1CB57BB")]
        internal interface IWindowNative
        {
            IntPtr WindowHandle { get; }
        }
...
}

In the future, we could do some new feature work to eliminate this requirement and make the APIs work more straightforward (there's a pending ask for new file/folder picker APIs #88). But this pattern is required for a few Windows 10 APIs like secondary tiles. I'd suggest upvoting and commenting on #88 if you're interested in an improved API! Thanks!

This solution works for me with FileOpenPicker, but does not work with FileSavePicker. I've tested this with Win UI 3 + .NET 5, 6, and 7 + last 10sih versions of WASDK.