Fix: Fixed a crash that would occur when opening file pickers and Files was running as admin

src/Files.App/Data/Contracts/ICommonDialogService.cs

@@ -0,0 +1,48 @@
+// Copyright (c) 2024 Files Community
+// Licensed under the MIT License. See the LICENSE.
+
+namespace Files.App.Data.Contracts
+{
+	/// <summary>
+	/// Provides service to launch common dialog through Win32API.
+	/// </summary>
+	public interface ICommonDialogService
+	{
+		/// <summary>
+		/// Opens a common dialog called FileOpenDialog through native Win32API.
+		/// </summary>
+		/// <param name="hWnd">The Window handle that the dialog launches based on.</param>
+		/// <param name="pickFoldersOnly">The value that indicates whether the picker is only for folders.</param>
+		/// <param name="filters">The extension filters that the dialog uses to exclude unnecessary files.<br/>The filter must have a pair:<code>[ "Application", ".exe" ]</code></param>
+		/// <param name="filePath">The file that that user chose.</param>
+		/// <remarks>
+		/// NOTE: There's a WinRT API to launch this dialog, but the API doesn't support windows that are launched by those who is in Administrators group or has broader privileges.
+		/// </remarks>
+		/// <returns>True if the 'Open' button was clicked; otherwise, false.</returns>
+		bool Open_FileOpenDialog(nint hWnd, bool pickFoldersOnly, string[] filters, Environment.SpecialFolder defaultFolder, out string filePath);
+
+		/// <summary>
+		/// Opens a common dialog called FileSaveDialog through native Win32API.
+		/// </summary>
+		/// <param name="hWnd">The Window handle that the dialog launches based on.</param>
+		/// <param name="pickFoldersOnly">The value that indicates whether the picker is only for folders.</param>
+		/// <param name="filters">The extension filters that the dialog uses to exclude unnecessary files.<br/>The filter must have a pair:<code>[ "Application", ".exe" ]</code></param>
+		/// <param name="filePath">The file that that user chose.</param>
+		/// <remarks>
+		/// NOTE: There's a WinRT API to launch this dialog, but the API doesn't support windows that are launched by those who is in Administrators group or has broader privileges.
+		/// </remarks>
+		/// <returns>True if the 'Open' button was clicked; otherwise, false.</returns>
+		bool Open_FileSaveDialog(nint hWnd, bool pickFoldersOnly, string[] filters, Environment.SpecialFolder defaultFolder, out string filePath);
+
+		/// <summary>
+		/// Opens a common dialog called NetworkConnectionDialog through native Win32API.
+		/// </summary>
+		/// <param name="hideRestoreConnectionCheckBox">The value indicating whether to hide the check box allowing the user to restore the connection at logon.</param>
+		/// <param name="persistConnectionAtLogon">The value indicating whether restore the connection at logon.</param>
+		/// <param name="readOnlyPath">The value indicating whether to display a read-only path instead of allowing the user to type in a path. This is only valid if <see cref="RemoteNetworkName"/> is not <see langword="null"/>.</param>
+		/// <param name="remoteNetworkName">The name of the remote network.</param>
+		/// <param name="useMostRecentPath">The value indicating whether to enter the most recently used paths into the combination box.</param>
+		/// <returns>True if the 'OK' button was clicked; otherwise, false.</returns>
+		bool Open_NetworkConnectionDialog(nint hWind, bool hideRestoreConnectionCheckBox = false, bool persistConnectionAtLogon = false, bool readOnlyPath = false, string? remoteNetworkName = null, bool useMostRecentPath = false);
+	}
+}

src/Files.App/Data/Contracts/IFileExplorerService.cs

@@ -24,20 +24,5 @@ public interface IFileExplorerService
 		/// <param name="cancellationToken">A <see cref="CancellationToken"/> that cancels this action.</param>
 		/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
 		Task OpenInFileExplorerAsync(ILocatableFolder folder, CancellationToken cancellationToken = default);
-
-		/// <summary>
-		/// Awaits the user input and picks single file from the file explorer dialog.
-		/// </summary>
-		/// <param name="filter">The filter to apply when picking files.</param>
-		/// <param name="cancellationToken">A <see cref="CancellationToken"/> that cancels this action.</param>
-		/// <returns>A <see cref="Task"/> that represents the asynchronous operation. If successful and a file has been picked, returns <see cref="ILocatableFile"/>, otherwise null.</returns>
-		Task<ILocatableFile?> PickSingleFileAsync(IEnumerable<string>? filter, CancellationToken cancellationToken = default);
-
-		/// <summary>
-		/// Awaits the user input and picks single folder from the file explorer dialog.
-		/// </summary>
-		/// <param name="cancellationToken">A <see cref="CancellationToken"/> that cancels this action.</param>
-		/// <returns>A <see cref="Task"/> that represents the asynchronous operation. If successful and a folder has been picked, returns <see cref="ILocatableFolder"/>, otherwise null.</returns>
-		Task<ILocatableFolder?> PickSingleFolderAsync(CancellationToken cancellationToken = default);
 	}
 }

src/Files.App/Helpers/Application/AppLifecycleHelper.cs

@@ -163,6 +163,7 @@ public static IHost ConfigureHost()
 					// Services
 					.AddSingleton<IAppThemeModeService, AppThemeModeService>()
 					.AddSingleton<IDialogService, DialogService>()
+					.AddSingleton<ICommonDialogService, CommonDialogService>()
 					.AddSingleton<IImageService, ImagingService>()
 					.AddSingleton<IThreadingService, ThreadingService>()
 					.AddSingleton<ILocalizationService, LocalizationService>()

src/Files.App/NativeMethods.txt

@@ -45,4 +45,10 @@ MoveFileFromApp
 DeleteFileFromApp
 RemoveDirectoryFromApp
 GetKeyState
-CreateDirectoryFromApp
+CreateDirectoryFromApp
+CoCreateInstance
+FileOpenDialog
+IFileOpenDialog
+SHCreateItemFromParsingName
+FileSaveDialog
+IFileSaveDialog