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Feature select multiple folder #5

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a799ded
Fix Unexpected HRESULT: 0x0000 returned from IModalWindow.Show(...) w…
Profy Jun 10, 2022
52db8a3
Updating FolderBrowserDialog to allow multiple folders selection
Profy Jun 10, 2022
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24 changes: 22 additions & 2 deletions ShellFileDialogs.Demo/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,12 +9,12 @@ internal static class Program
[STAThread] // <-- " If the attribute is not present, the application uses the multithreaded apartment model, which is not supported for Windows Forms."
public static Int32 Main( String[] args )
{
Console.WriteLine( "Now showing a folder browser dialog. Press [Enter] to continue." );
Console.WriteLine( "Now showing a folder browser dialog to select a single folder. Press [Enter] to continue." );
_ = Console.ReadLine();

// FolderBrowserDialog
{
String selectedDirectory = FolderBrowserDialog.ShowDialog( parentHWnd: IntPtr.Zero, title: "Select a folder...", initialDirectory: null );
String selectedDirectory = FolderBrowserDialog.ShowSingleSelectDialog( parentHWnd: IntPtr.Zero, title: "Select a folder...", initialDirectory: null );
if( selectedDirectory != null )
{
Console.WriteLine( "Folder browser. Selected directory: \"{0}\".", selectedDirectory );
Expand All @@ -25,6 +25,26 @@ public static Int32 Main( String[] args )
}
}

Console.WriteLine( "Now showing a folder browser dialog to select multiple folders. Press [Enter] to continue.");
_ = Console.ReadLine();

// FolderBrowserDialog
{
IReadOnlyList<String> selectedDirectories = FolderBrowserDialog.ShowMultiSelectDialog( parentHWnd: IntPtr.Zero, title: "Select multiple folders...", initialDirectory: null );
if ( selectedDirectories != null )
{
Console.WriteLine( "Folder browser. Selected directories:" );
foreach ( String directory in selectedDirectories )
{
Console.WriteLine( directory );
}
}
else
{
Console.WriteLine( "Folder browser. Cancelled." );
}
}

Console.WriteLine( "Now showing an open-file dialog to select multiple files (with multiple extension filters). Press [Enter] to continue." );
_ = Console.ReadLine();

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146 changes: 85 additions & 61 deletions ShellFileDialogs/Dialogs/FolderBrowserDialog.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,85 +4,109 @@

namespace ShellFileDialogs
{
public static class FolderBrowserDialog
{
/// <summary>Shows the folder browser dialog. Returns <see langword="null"/> if the user cancelled the dialog. Otherwise returns the selected path.</summary>
public static class FolderBrowserDialog
{
/// <summary>Shows the folder browser dialog. Returns <see langword="null"/> if the user cancelled the dialog. Otherwise returns the selected path.</summary>
#if NETCOREAPP3_1_OR_GREATER
public static String? ShowDialog(IntPtr parentHWnd, String? title, String? initialDirectory)
public static IReadOnlyList<String>? ShowMultiSelectDialog(IntPtr parentHWnd, String? title, String? initialDirectory)
#else
public static String ShowDialog(IntPtr parentHWnd, String title, String initialDirectory)
public static IReadOnlyList<String> ShowMultiSelectDialog(IntPtr parentHWnd, String title, String initialDirectory)
#endif
{
NativeFileOpenDialog nfod = new NativeFileOpenDialog();
try
{
return ShowDialogInner( nfod, parentHWnd, title, initialDirectory );
}
finally
{
_ = Marshal.ReleaseComObject( nfod );
}
}
{
return ShowDialog(parentHWnd, title, initialDirectory, FileOpenOptions.AllowMultiSelect);
}

/// <summary>Shows the folder browser dialog. Returns <see langword="null"/> if the user cancelled the dialog. Otherwise returns the selected path.</summary>
#if NETCOREAPP3_1_OR_GREATER
private static String? ShowDialogInner(IFileOpenDialog dialog, IntPtr parentHWnd, String? title, String? initialDirectory)
public static String? ShowSingleSelectDialog(IntPtr parentHWnd, String? title, String? initialDirectory)
#else
private static String ShowDialogInner(IFileOpenDialog dialog, IntPtr parentHWnd, String title, String initialDirectory)
public static String ShowSingleSelectDialog(IntPtr parentHWnd, String title, String initialDirectory)
#endif
{
//IFileDialog ifd = dialog;
FileOpenOptions flags =
FileOpenOptions.NoTestFileCreate |
FileOpenOptions.PathMustExist |
FileOpenOptions.PickFolders |
FileOpenOptions.ForceFilesystem;
{
#if NETCOREAPP3_1_OR_GREATER
IReadOnlyList<String>? fileNames = ShowDialog(parentHWnd, title, initialDirectory, FileOpenOptions.None);
#else
IReadOnlyList<String> fileNames = ShowDialog(parentHWnd, title, initialDirectory, FileOpenOptions.None);
#endif
if (fileNames != null && fileNames.Count > 0)
{
return fileNames[0];
}
else
{
return null;
}
}

#if NETCOREAPP3_1_OR_GREATER
private static IReadOnlyList<String>? ShowDialog(IntPtr parentHWnd, String title, String initialDirectory, FileOpenOptions flags)
#else
private static IReadOnlyList<String> ShowDialog(IntPtr parentHWnd, String title, String initialDirectory, FileOpenOptions flags)
#endif
{
NativeFileOpenDialog nfod = new NativeFileOpenDialog();
try
{
return ShowDialogInner(nfod, parentHWnd, title, initialDirectory, flags);
}
finally
{
_ = Marshal.ReleaseComObject(nfod);
}
}

#if NETCOREAPP3_1_OR_GREATER
private static IReadOnlyList<String>? ShowDialogInner(IFileOpenDialog dialog, IntPtr parentHWnd, String? title, String? initialDirectory, FileOpenOptions flags)
#else
private static IReadOnlyList<String> ShowDialogInner(IFileOpenDialog dialog, IntPtr parentHWnd, String title, String initialDirectory, FileOpenOptions flags)
#endif
{
//IFileDialog ifd = dialog;
flags = flags |
FileOpenOptions.NoTestFileCreate |
FileOpenOptions.PathMustExist |
FileOpenOptions.PickFolders |
FileOpenOptions.ForceFilesystem;

dialog.SetOptions(flags);

dialog.SetOptions( flags );

if( title != null )
{
dialog.SetTitle( title );
}
if (title != null)
{
dialog.SetTitle(title);
}

if( initialDirectory != null )
{
if (initialDirectory != null)
{
#if NETCOREAPP3_1_OR_GREATER
IShellItem2? initialDirectoryShellItem = Utility.ParseShellItem2Name( initialDirectory );
#else
IShellItem2 initialDirectoryShellItem = Utility.ParseShellItem2Name( initialDirectory );
IShellItem2 initialDirectoryShellItem = Utility.ParseShellItem2Name(initialDirectory);
#endif
if( initialDirectoryShellItem != null )
{
dialog.SetFolder( initialDirectoryShellItem );
}
}
if (initialDirectoryShellItem != null)
{
dialog.SetFolder(initialDirectoryShellItem);
}
}

//
//

HResult hr = dialog.Show( parentHWnd );
if( hr.ValidateDialogShowHResult() )
{
dialog.GetResults( out IShellItemArray resultsArray );
HResult hr = dialog.Show(parentHWnd);
if (hr.ValidateDialogShowHResult())
{
dialog.GetResults(out IShellItemArray resultsArray);

#if NETCOREAPP3_1_OR_GREATER
IReadOnlyList<String?> fileNames = Utility.GetFileNames( resultsArray );
#else
IReadOnlyList<String> fileNames = Utility.GetFileNames( resultsArray );
IReadOnlyList<String> fileNames = Utility.GetFileNames(resultsArray);
#endif
if( fileNames.Count == 0 )
{
return null;
}
else
{
return fileNames[0];
}
}
else
{
// User cancelled.
return null;
}
}
}
return fileNames;
}
else
{
// User cancelled.
return null;
}
}
}
}
4 changes: 4 additions & 0 deletions ShellFileDialogs/HResults.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,10 @@ public static Boolean TryGetWin32ErrorCode( this HResult hr, out Win32ErrorCodes
return true;
}
}
if(0 <= hr)
{
return true;
}
}
}

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