Pregunta

¿Cómo puedo presentar un control al usuario que le permita seleccionar un directorio?

¿No parece haber ningún control .net nativo que haga esto?

¿Fue útil?

Solución

El Clase FolderBrowserDialog es la mejor opción.

Otros consejos

string folderPath = "";
FolderBrowserDialog folderBrowserDialog1 = new FolderBrowserDialog();
if (folderBrowserDialog1.ShowDialog() == DialogResult.OK) {
    folderPath = folderBrowserDialog1.SelectedPath ;
}

Nota:No hay garantía de que este código funcione en futuras versiones de .Net Framework.El uso de elementos internos del marco .Net privado como se hace aquí a través de la reflexión probablemente no sea bueno en general.Utilice la solución de interoperabilidad mencionada en la parte inferior, ya que es menos probable que cambie la API de Windows.

Si está buscando un selector de carpetas que se parezca más al cuadro de diálogo de Windows 7, con la capacidad de copiar y pegar desde un cuadro de texto en la parte inferior y el panel de navegación a la izquierda con favoritos y ubicaciones comunes, entonces puede acceder a él. de una forma muy ligera.

La interfaz de usuario de FolderBrowserDialog es mínima:

enter image description here

Pero puedes tener esto en su lugar:

enter image description here

Aquí hay una clase que abre un selector de carpetas estilo Vista usando el directorio privado .Net. IFileDialog interfaz, sin utilizar directamente la interoperabilidad en el código (.Net se encarga de eso por usted).Vuelve al cuadro de diálogo anterior a Vista si no está en una versión de Windows lo suficientemente alta.Debería funcionar en Windows 7, 8, 9, 10 y superior (teóricamente).

using System;
using System.Reflection;
using System.Windows.Forms;

namespace MyCoolCompany.Shuriken {
    /// <summary>
    /// Present the Windows Vista-style open file dialog to select a folder. Fall back for older Windows Versions
    /// </summary>
    public class FolderSelectDialog {
        private string _initialDirectory;
        private string _title;
        private string _fileName = "";

        public string InitialDirectory {
            get { return string.IsNullOrEmpty(_initialDirectory) ? Environment.CurrentDirectory : _initialDirectory; }
            set { _initialDirectory = value; }
        }
        public string Title {
            get { return _title ?? "Select a folder"; }
            set { _title = value; }
        }
        public string FileName { get { return _fileName; } }

        public bool Show() { return Show(IntPtr.Zero); }

        /// <param name="hWndOwner">Handle of the control or window to be the parent of the file dialog</param>
        /// <returns>true if the user clicks OK</returns>
        public bool Show(IntPtr hWndOwner) {
            var result = Environment.OSVersion.Version.Major >= 6
                ? VistaDialog.Show(hWndOwner, InitialDirectory, Title)
                : ShowXpDialog(hWndOwner, InitialDirectory, Title);
            _fileName = result.FileName;
            return result.Result;
        }

        private struct ShowDialogResult {
            public bool Result { get; set; }
            public string FileName { get; set; }
        }

        private static ShowDialogResult ShowXpDialog(IntPtr ownerHandle, string initialDirectory, string title) {
            var folderBrowserDialog = new FolderBrowserDialog {
                Description = title,
                SelectedPath = initialDirectory,
                ShowNewFolderButton = false
            };
            var dialogResult = new ShowDialogResult();
            if (folderBrowserDialog.ShowDialog(new WindowWrapper(ownerHandle)) == DialogResult.OK) {
                dialogResult.Result = true;
                dialogResult.FileName = folderBrowserDialog.SelectedPath;
            }
            return dialogResult;
        }

        private static class VistaDialog {
            private const string c_foldersFilter = "Folders|\n";

            private const BindingFlags c_flags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
            private readonly static Assembly s_windowsFormsAssembly = typeof(FileDialog).Assembly;
            private readonly static Type s_iFileDialogType = s_windowsFormsAssembly.GetType("System.Windows.Forms.FileDialogNative+IFileDialog");
            private readonly static MethodInfo s_createVistaDialogMethodInfo = typeof(OpenFileDialog).GetMethod("CreateVistaDialog", c_flags);
            private readonly static MethodInfo s_onBeforeVistaDialogMethodInfo = typeof(OpenFileDialog).GetMethod("OnBeforeVistaDialog", c_flags);
            private readonly static MethodInfo s_getOptionsMethodInfo = typeof(FileDialog).GetMethod("GetOptions", c_flags);
            private readonly static MethodInfo s_setOptionsMethodInfo = s_iFileDialogType.GetMethod("SetOptions", c_flags);
            private readonly static uint s_fosPickFoldersBitFlag = (uint) s_windowsFormsAssembly
                .GetType("System.Windows.Forms.FileDialogNative+FOS")
                .GetField("FOS_PICKFOLDERS")
                .GetValue(null);
            private readonly static ConstructorInfo s_vistaDialogEventsConstructorInfo = s_windowsFormsAssembly
                .GetType("System.Windows.Forms.FileDialog+VistaDialogEvents")
                .GetConstructor(c_flags, null, new[] { typeof(FileDialog) }, null);
            private readonly static MethodInfo s_adviseMethodInfo = s_iFileDialogType.GetMethod("Advise");
            private readonly static MethodInfo s_unAdviseMethodInfo = s_iFileDialogType.GetMethod("Unadvise");
            private readonly static MethodInfo s_showMethodInfo = s_iFileDialogType.GetMethod("Show");

            public static ShowDialogResult Show(IntPtr ownerHandle, string initialDirectory, string title) {
                var openFileDialog = new OpenFileDialog {
                    AddExtension = false,
                    CheckFileExists = false,
                    DereferenceLinks = true,
                    Filter = c_foldersFilter,
                    InitialDirectory = initialDirectory,
                    Multiselect = false,
                    Title = title
                };

                var iFileDialog = s_createVistaDialogMethodInfo.Invoke(openFileDialog, new object[] { });
                s_onBeforeVistaDialogMethodInfo.Invoke(openFileDialog, new[] { iFileDialog });
                s_setOptionsMethodInfo.Invoke(iFileDialog, new object[] { (uint) s_getOptionsMethodInfo.Invoke(openFileDialog, new object[] { }) | s_fosPickFoldersBitFlag });
                var adviseParametersWithOutputConnectionToken = new[] { s_vistaDialogEventsConstructorInfo.Invoke(new object[] { openFileDialog }), 0U };
                s_adviseMethodInfo.Invoke(iFileDialog, adviseParametersWithOutputConnectionToken);

                try {
                    int retVal = (int) s_showMethodInfo.Invoke(iFileDialog, new object[] { ownerHandle });
                    return new ShowDialogResult {
                        Result = retVal == 0,
                        FileName = openFileDialog.FileName
                    };
                }
                finally {
                    s_unAdviseMethodInfo.Invoke(iFileDialog, new[] { adviseParametersWithOutputConnectionToken[1] });
                }
            }
        }

        // Wrap an IWin32Window around an IntPtr
        private class WindowWrapper : IWin32Window {
            private readonly IntPtr _handle;
            public WindowWrapper(IntPtr handle) { _handle = handle; }
            public IntPtr Handle { get { return _handle; } }
        }
    }
}

Desarrollé esto como una versión limpia de Cuadro de diálogo de selección de carpeta estilo .NET Win 7 por Bill Seddon de liquidez.com (No tengo afiliación).Escribí la mía propia porque su solución requiere una clase de Reflexión adicional que no es necesaria para este propósito específico, usa control de flujo basado en excepciones y no almacena en caché los resultados de sus llamadas de reflexión.Tenga en cuenta que la estática anidada VistaDialog clase es para que sus variables de reflexión estáticas no intenten completarse si el Show El método nunca se llama.

Se usa así en un formulario de Windows:

var dialog = new FolderSelectDialog {
    InitialDirectory = musicFolderTextBox.Text,
    Title = "Select a folder to import music from"
};
if (dialog.Show(Handle)) {
    musicFolderTextBox.Text = dialog.FileName;
}

Por supuesto, puedes jugar con sus opciones y las propiedades que expone.Por ejemplo, permite la selección múltiple en el cuadro de diálogo estilo Vista.

Además, tenga en cuenta que Simon Mourier dio una respuesta eso muestra cómo hacer exactamente el mismo trabajo usando la interoperabilidad directamente con la API de Windows, aunque su versión tendría que complementarse para usar el cuadro de diálogo de estilo anterior si se encuentra en una versión anterior de Windows.Desafortunadamente, aún no había encontrado su publicación cuando encontré mi solución.¡Nombra tu veneno!

Podrías usar simplemente el FolderBrowserDialog clase de la System.Windows.Forms espacio de nombres.

No intente crear el suyo propio con una clase TreeView/DirectoryInfo.Por un lado, hay muchas funciones interesantes que se obtienen de forma gratuita (iconos/clic derecho/redes) al utilizar SHBrowseForFolder.Por otro lado, hay casos extremos/capturas que probablemente no conozca.

Podrías usar un TreeView en combinación con la clase DirectoryInfo.

Para obtener muchas más funciones que FolderBrowserdialog, como filtrado, casillas de verificación, etc., eche un vistazo a controles de terceros como Megapaquete de conchas.Dado que son controles, pueden colocarse en sus propios formularios en lugar de aparecer como un diálogo modal.

o incluso mejor, puedes poner este código en un archivo de clase

using System;
using System.IO;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Windows.Forms;

internal class OpenFolderDialog : IDisposable {

    /// <summary>
    /// Gets/sets folder in which dialog will be open.
    /// </summary>
    public string InitialFolder { get; set; }

    /// <summary>
    /// Gets/sets directory in which dialog will be open if there is no recent directory available.
    /// </summary>
    public string DefaultFolder { get; set; }

    /// <summary>
    /// Gets selected folder.
    /// </summary>
    public string Folder { get; private set; }


    internal DialogResult ShowDialog(IWin32Window owner) {
        if (Environment.OSVersion.Version.Major >= 6) {
            return ShowVistaDialog(owner);
        } else {
            return ShowLegacyDialog(owner);
        }
    }

    private DialogResult ShowVistaDialog(IWin32Window owner) {
        var frm = (NativeMethods.IFileDialog)(new NativeMethods.FileOpenDialogRCW());
        uint options;
        frm.GetOptions(out options);
        options |= NativeMethods.FOS_PICKFOLDERS | NativeMethods.FOS_FORCEFILESYSTEM | NativeMethods.FOS_NOVALIDATE | NativeMethods.FOS_NOTESTFILECREATE | NativeMethods.FOS_DONTADDTORECENT;
        frm.SetOptions(options);
        if (this.InitialFolder != null) {
            NativeMethods.IShellItem directoryShellItem;
            var riid = new Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"); //IShellItem
            if (NativeMethods.SHCreateItemFromParsingName(this.InitialFolder, IntPtr.Zero, ref riid, out directoryShellItem) == NativeMethods.S_OK) {
                frm.SetFolder(directoryShellItem);
            }
        }
        if (this.DefaultFolder != null) {
            NativeMethods.IShellItem directoryShellItem;
            var riid = new Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"); //IShellItem
            if (NativeMethods.SHCreateItemFromParsingName(this.DefaultFolder, IntPtr.Zero, ref riid, out directoryShellItem) == NativeMethods.S_OK) {
                frm.SetDefaultFolder(directoryShellItem);
            }
        }

        if (frm.Show(owner.Handle) == NativeMethods.S_OK) {
            NativeMethods.IShellItem shellItem;
            if (frm.GetResult(out shellItem) == NativeMethods.S_OK) {
                IntPtr pszString;
                if (shellItem.GetDisplayName(NativeMethods.SIGDN_FILESYSPATH, out pszString) == NativeMethods.S_OK) {
                    if (pszString != IntPtr.Zero) {
                        try {
                            this.Folder = Marshal.PtrToStringAuto(pszString);
                            return DialogResult.OK;
                        } finally {
                            Marshal.FreeCoTaskMem(pszString);
                        }
                    }
                }
            }
        }
        return DialogResult.Cancel;
    }

    private DialogResult ShowLegacyDialog(IWin32Window owner) {
        using (var frm = new SaveFileDialog()) {
            frm.CheckFileExists = false;
            frm.CheckPathExists = true;
            frm.CreatePrompt = false;
            frm.Filter = "|" + Guid.Empty.ToString();
            frm.FileName = "any";
            if (this.InitialFolder != null) { frm.InitialDirectory = this.InitialFolder; }
            frm.OverwritePrompt = false;
            frm.Title = "Select Folder";
            frm.ValidateNames = false;
            if (frm.ShowDialog(owner) == DialogResult.OK) {
                this.Folder = Path.GetDirectoryName(frm.FileName);
                return DialogResult.OK;
            } else {
                return DialogResult.Cancel;
            }
        }
    }


    public void Dispose() { } //just to have possibility of Using statement.

}

internal static class NativeMethods {

    #region Constants

    public const uint FOS_PICKFOLDERS = 0x00000020;
    public const uint FOS_FORCEFILESYSTEM = 0x00000040;
    public const uint FOS_NOVALIDATE = 0x00000100;
    public const uint FOS_NOTESTFILECREATE = 0x00010000;
    public const uint FOS_DONTADDTORECENT = 0x02000000;

    public const uint S_OK = 0x0000;

    public const uint SIGDN_FILESYSPATH = 0x80058000;

    #endregion


    #region COM

    [ComImport, ClassInterface(ClassInterfaceType.None), TypeLibType(TypeLibTypeFlags.FCanCreate), Guid("DC1C5A9C-E88A-4DDE-A5A1-60F82A20AEF7")]
    internal class FileOpenDialogRCW { }


    [ComImport(), Guid("42F85136-DB7E-439C-85F1-E4075D135FC8"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IFileDialog {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        [PreserveSig()]
        uint Show([In, Optional] IntPtr hwndOwner); //IModalWindow 


        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetFileTypes([In] uint cFileTypes, [In, MarshalAs(UnmanagedType.LPArray)] IntPtr rgFilterSpec);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetFileTypeIndex([In] uint iFileType);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetFileTypeIndex(out uint piFileType);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint Advise([In, MarshalAs(UnmanagedType.Interface)] IntPtr pfde, out uint pdwCookie);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint Unadvise([In] uint dwCookie);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetOptions([In] uint fos);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetOptions(out uint fos);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        void SetDefaultFolder([In, MarshalAs(UnmanagedType.Interface)] IShellItem psi);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetFolder([In, MarshalAs(UnmanagedType.Interface)] IShellItem psi);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetFolder([MarshalAs(UnmanagedType.Interface)] out IShellItem ppsi);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetCurrentSelection([MarshalAs(UnmanagedType.Interface)] out IShellItem ppsi);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetFileName([In, MarshalAs(UnmanagedType.LPWStr)] string pszName);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetFileName([MarshalAs(UnmanagedType.LPWStr)] out string pszName);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetTitle([In, MarshalAs(UnmanagedType.LPWStr)] string pszTitle);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetOkButtonLabel([In, MarshalAs(UnmanagedType.LPWStr)] string pszText);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetFileNameLabel([In, MarshalAs(UnmanagedType.LPWStr)] string pszLabel);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetResult([MarshalAs(UnmanagedType.Interface)] out IShellItem ppsi);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint AddPlace([In, MarshalAs(UnmanagedType.Interface)] IShellItem psi, uint fdap);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetDefaultExtension([In, MarshalAs(UnmanagedType.LPWStr)] string pszDefaultExtension);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint Close([MarshalAs(UnmanagedType.Error)] uint hr);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetClientGuid([In] ref Guid guid);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint ClearClientData();

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint SetFilter([MarshalAs(UnmanagedType.Interface)] IntPtr pFilter);
    }


    [ComImport, Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IShellItem {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint BindToHandler([In] IntPtr pbc, [In] ref Guid rbhid, [In] ref Guid riid, [Out, MarshalAs(UnmanagedType.Interface)] out IntPtr ppvOut);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetParent([MarshalAs(UnmanagedType.Interface)] out IShellItem ppsi);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetDisplayName([In] uint sigdnName, out IntPtr ppszName);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint GetAttributes([In] uint sfgaoMask, out uint psfgaoAttribs);

        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        uint Compare([In, MarshalAs(UnmanagedType.Interface)] IShellItem psi, [In] uint hint, out int piOrder);
    }

    #endregion


    [DllImport("shell32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
    internal static extern int SHCreateItemFromParsingName([MarshalAs(UnmanagedType.LPWStr)] string pszPath, IntPtr pbc, ref Guid riid, [MarshalAs(UnmanagedType.Interface)] out IShellItem ppv);

}

Y úsalo así

using (var frm = new OpenFolderDialog()) {
                if (frm.ShowDialog(this)== DialogResult.OK) {
                    MessageBox.Show(this, frm.Folder);
                }
            }

una mejor manera de hacerlo y con selección de carpetas múltiples

using System;
using System.Reflection;
using System.Windows.Forms;

class OpenFolderDialog
{
    //public bool AddExtension { get; set; }
    public bool AutoUpgradeEnabled { get; set; }
    //public bool CheckFileExists { get; set; }
    public bool CheckPathExists { get; set; }
    //public bool DereferenceLinks { get; set; }
    public string Title { get; set; }
    //public string DefaultExt { get; set; }
    public string InitialDirectory { get; set; }
    //public bool ValidateNames { get; set; }
    //public bool SupportMultiDottedExtensions { get; set; }
    //public bool ShowHelp { get; set; }
    public bool Multiselect { get; set; }
    public bool RestoreDirectory { get; set; }
    //public string Filter { get; set; }
    public string SelectedPath { get; private set; }
    public string[] SelectedPaths { get; private set; }

    private FolderBrowserDialog FolderBrowser
    {
        get
        {
            return new FolderBrowserDialog()
            {
                ShowNewFolderButton = true,
                Description = Title,
                SelectedPath = InitialDirectory
            };
        }
    }

    private OpenFileDialog Dialog
    {
        get
        {
            return new OpenFileDialog()
            {
                Title = Title,
                AddExtension = false,
                AutoUpgradeEnabled = AutoUpgradeEnabled,
                CheckFileExists = true,
                CheckPathExists = CheckPathExists,
                DefaultExt = string.Empty,
                DereferenceLinks = false,
                InitialDirectory = InitialDirectory,
                ValidateNames = false,
                SupportMultiDottedExtensions = false,
                ShowHelp = false,
                Multiselect = Multiselect,
                RestoreDirectory = RestoreDirectory,
                Filter = string.Empty,
                FileName = SelectedPath
            };
        }
    }

    /// <param name="hWndOwner">Handle of the control or window to be the parent of the file dialog</param>
    /// <returns>true if the user clicks OK</returns>
    public DialogResult ShowDialog(IntPtr hWndOwner)
    {
        if (Environment.OSVersion.Version.Major >= 6)
        {
            OpenFileDialog dialog = Dialog;
            DialogResult result = VistaDialog.Show(hWndOwner, dialog) != 0 ? DialogResult.Cancel : DialogResult.OK;
            SelectedPath = dialog.FileName;
            SelectedPaths = dialog.FileNames;
            return result;
        }
        else
        {
            FolderBrowserDialog XPDialog = FolderBrowser;
            DialogResult result = XPDialog.ShowDialog();
            SelectedPath = XPDialog.SelectedPath;
            return result;
        }
    }

    private static class VistaDialog
    {
        private const BindingFlags c_flags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
        private readonly static Assembly s_windowsFormsAssembly = typeof(FileDialog).Assembly;
        private readonly static Type s_iFileDialogType = s_windowsFormsAssembly.GetType("System.Windows.Forms.FileDialogNative+IFileDialog");
        private readonly static MethodInfo s_createVistaDialogMethodInfo = typeof(OpenFileDialog).GetMethod("CreateVistaDialog", c_flags);
        private readonly static MethodInfo s_onBeforeVistaDialogMethodInfo = typeof(OpenFileDialog).GetMethod("OnBeforeVistaDialog", c_flags);
        private readonly static MethodInfo s_getOptionsMethodInfo = typeof(FileDialog).GetMethod("GetOptions", c_flags);
        private readonly static MethodInfo s_setOptionsMethodInfo = s_iFileDialogType.GetMethod("SetOptions", c_flags);
        private readonly static uint s_fosPickFoldersBitFlag = (uint)s_windowsFormsAssembly
            .GetType("System.Windows.Forms.FileDialogNative+FOS")
            .GetField("FOS_PICKFOLDERS")
            .GetValue(null);
        private readonly static ConstructorInfo s_vistaDialogEventsConstructorInfo = s_windowsFormsAssembly
            .GetType("System.Windows.Forms.FileDialog+VistaDialogEvents")
            .GetConstructor(c_flags, null, new[] { typeof(FileDialog) }, null);
        private readonly static MethodInfo s_adviseMethodInfo = s_iFileDialogType.GetMethod("Advise");
        private readonly static MethodInfo s_unAdviseMethodInfo = s_iFileDialogType.GetMethod("Unadvise");
        private readonly static MethodInfo s_showMethodInfo = s_iFileDialogType.GetMethod("Show");

        public static int Show(IntPtr ownerHandle, OpenFileDialog dialog)
        {
            var iFileDialog = s_createVistaDialogMethodInfo.Invoke(dialog, new object[] { });
            s_onBeforeVistaDialogMethodInfo.Invoke(dialog, new[] { iFileDialog });
            s_setOptionsMethodInfo.Invoke(iFileDialog, new object[] { (uint)s_getOptionsMethodInfo.Invoke(dialog, new object[] { }) | s_fosPickFoldersBitFlag });
            var adviseParametersWithOutputConnectionToken = new[] { s_vistaDialogEventsConstructorInfo.Invoke(new object[] { dialog }), 0U };
            s_adviseMethodInfo.Invoke(iFileDialog, adviseParametersWithOutputConnectionToken);

            try
            {
                return (int)s_showMethodInfo.Invoke(iFileDialog, new object[] { ownerHandle });

            }
            finally
            {
                s_unAdviseMethodInfo.Invoke(iFileDialog, new[] { adviseParametersWithOutputConnectionToken[1] });
            }
        }
    }
}

uso:

OpenFolderDialog folder = new OpenFolderDialog()
            {
                Title = "Select destination folder",
                AutoUpgradeEnabled = true,
                CheckPathExists = true,
                InitialDirectory =
                Environment.GetFolderPath
                (Environment.SpecialFolder.DesktopDirectory),
                Multiselect = true,
                RestoreDirectory = true
            };
            DialogResult result = folder.ShowDialog(IntPtr.Zero);
            if (result.Equals(DialogResult.OK))
                MessageBox.Show(folder.SelectedPath + " Paths:" + folder.SelectedPaths.Length);
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