请注意，这不是一个重复的问题。
如何从 PropertyGrid 显示详细的 FolderBrowser，如下图所示（来自具有省略号的字段/属性......）
使用
[EditorAttribute(typeof(System.Windows.Forms.Design.FileNameEditor), typeof(System.Drawing.Design.UITypeEditor))]
[EditorAttribute(typeof(System.Windows.Forms.Design.FolderNameEditor), typeof(System.Drawing.Design.UITypeEditor))]
我们得到了简约的文件夹浏览器
这是一个自定义 UITypeEditor，它允许您使用 Vista 文件夹浏览器：
您可以像使用任何其他编辑器一样使用它：
[EditorAttribute(typeof(FolderNameEditor2), typeof(System.Drawing.Design.UITypeEditor))]
它依赖于我为此场合编写的自定义 FolderBrowser2 类。当然，这仅适用于 Windows Vista 及更高版本。在以前的 Windows 版本中，除了简单的文件夹浏览器之外，没有其他的文件夹浏览器。
public class FolderNameEditor2 : UITypeEditor
{
public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
{
return UITypeEditorEditStyle.Modal;
}
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
FolderBrowser2 browser = new FolderBrowser2();
if (value != null)
{
browser.DirectoryPath = string.Format("{0}", value);
}
if (browser.ShowDialog(null) == DialogResult.OK)
return browser.DirectoryPath;
return value;
}
}
public class FolderBrowser2
{
public string DirectoryPath { get; set; }
public DialogResult ShowDialog(IWin32Window owner)
{
IntPtr hwndOwner = owner != null ? owner.Handle : GetActiveWindow();
IFileOpenDialog dialog = (IFileOpenDialog)new FileOpenDialog();
try
{
IShellItem item;
if (!string.IsNullOrEmpty(DirectoryPath))
{
IntPtr idl;
uint atts = 0;
if (SHILCreateFromPath(DirectoryPath, out idl, ref atts) == 0)
{
if (SHCreateShellItem(IntPtr.Zero, IntPtr.Zero, idl, out item) == 0)
{
dialog.SetFolder(item);
}
Marshal.FreeCoTaskMem(idl);
}
}
dialog.SetOptions(FOS.FOS_PICKFOLDERS | FOS.FOS_FORCEFILESYSTEM);
uint hr = dialog.Show(hwndOwner);
if (hr == ERROR_CANCELLED)
return DialogResult.Cancel;
if (hr != 0)
return DialogResult.Abort;
dialog.GetResult(out item);
string path;
item.GetDisplayName(SIGDN.SIGDN_FILESYSPATH, out path);
DirectoryPath = path;
return DialogResult.OK;
}
finally
{
Marshal.ReleaseComObject(dialog);
}
}
[DllImport("shell32.dll")]
private static extern int SHILCreateFromPath([MarshalAs(UnmanagedType.LPWStr)] string pszPath, out IntPtr ppIdl, ref uint rgflnOut);
[DllImport("shell32.dll")]
private static extern int SHCreateShellItem(IntPtr pidlParent, IntPtr psfParent, IntPtr pidl, out IShellItem ppsi);
[DllImport("user32.dll")]
private static extern IntPtr GetActiveWindow();
private const uint ERROR_CANCELLED = 0x800704C7;
[ComImport]
[Guid("DC1C5A9C-E88A-4dde-A5A1-60F82A20AEF7")]
private class FileOpenDialog
{
}
[ComImport]
[Guid("42f85136-db7e-439c-85f1-e4075d135fc8")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IFileOpenDialog
{
[PreserveSig]
uint Show([In] IntPtr parent); // IModalWindow
void SetFileTypes(); // not fully defined
void SetFileTypeIndex([In] uint iFileType);
void GetFileTypeIndex(out uint piFileType);
void Advise(); // not fully defined
void Unadvise();
void SetOptions([In] FOS fos);
void GetOptions(out FOS pfos);
void SetDefaultFolder(IShellItem psi);
void SetFolder(IShellItem psi);
void GetFolder(out IShellItem ppsi);
void GetCurrentSelection(out IShellItem ppsi);
void SetFileName([In, MarshalAs(UnmanagedType.LPWStr)] string pszName);
void GetFileName([MarshalAs(UnmanagedType.LPWStr)] out string pszName);
void SetTitle([In, MarshalAs(UnmanagedType.LPWStr)] string pszTitle);
void SetOkButtonLabel([In, MarshalAs(UnmanagedType.LPWStr)] string pszText);
void SetFileNameLabel([In, MarshalAs(UnmanagedType.LPWStr)] string pszLabel);
void GetResult(out IShellItem ppsi);
void AddPlace(IShellItem psi, int alignment);
void SetDefaultExtension([In, MarshalAs(UnmanagedType.LPWStr)] string pszDefaultExtension);
void Close(int hr);
void SetClientGuid(); // not fully defined
void ClearClientData();
void SetFilter([MarshalAs(UnmanagedType.Interface)] IntPtr pFilter);
void GetResults([MarshalAs(UnmanagedType.Interface)] out IntPtr ppenum); // not fully defined
void GetSelectedItems([MarshalAs(UnmanagedType.Interface)] out IntPtr ppsai); // not fully defined
}
[ComImport]
[Guid("43826D1E-E718-42EE-BC55-A1E261C37BFE")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
private interface IShellItem
{
void BindToHandler(); // not fully defined
void GetParent(); // not fully defined
void GetDisplayName([In] SIGDN sigdnName, [MarshalAs(UnmanagedType.LPWStr)] out string ppszName);
void GetAttributes(); // not fully defined
void Compare(); // not fully defined
}
private enum SIGDN : uint
{
SIGDN_DESKTOPABSOLUTEEDITING = 0x8004c000,
SIGDN_DESKTOPABSOLUTEPARSING = 0x80028000,
SIGDN_FILESYSPATH = 0x80058000,
SIGDN_NORMALDISPLAY = 0,
SIGDN_PARENTRELATIVE = 0x80080001,
SIGDN_PARENTRELATIVEEDITING = 0x80031001,
SIGDN_PARENTRELATIVEFORADDRESSBAR = 0x8007c001,
SIGDN_PARENTRELATIVEPARSING = 0x80018001,
SIGDN_URL = 0x80068000
}
[Flags]
private enum FOS
{
FOS_ALLNONSTORAGEITEMS = 0x80,
FOS_ALLOWMULTISELECT = 0x200,
FOS_CREATEPROMPT = 0x2000,
FOS_DEFAULTNOMINIMODE = 0x20000000,
FOS_DONTADDTORECENT = 0x2000000,
FOS_FILEMUSTEXIST = 0x1000,
FOS_FORCEFILESYSTEM = 0x40,
FOS_FORCESHOWHIDDEN = 0x10000000,
FOS_HIDEMRUPLACES = 0x20000,
FOS_HIDEPINNEDPLACES = 0x40000,
FOS_NOCHANGEDIR = 8,
FOS_NODEREFERENCELINKS = 0x100000,
FOS_NOREADONLYRETURN = 0x8000,
FOS_NOTESTFILECREATE = 0x10000,
FOS_NOVALIDATE = 0x100,
FOS_OVERWRITEPROMPT = 2,
FOS_PATHMUSTEXIST = 0x800,
FOS_PICKFOLDERS = 0x20,
FOS_SHAREAWARE = 0x4000,
FOS_STRICTFILETYPES = 4
}
}
这是一个与 Simon Mourier 的答案相同的解决方案，无需直接使用互操作（.Net 会为您处理）。如果 Windows 版本不够高，它还具有回退到 Vista 之前的对话框的附加功能。应该在 Windows 7、8、10 和更高版本（理论上）中工作。
有一个很大的警告：微软可以随意更改其内部类。由于这使用反射来破坏范围规则并且不支持此操作（Microsoft 只对公开公开的内容感兴趣），因此如果 Microsoft 确实进行更改，此代码可能会中断。
using System;
using System.Reflection;
using System.Windows.Forms;
namespace ErikE.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; } }
}
}
}
我将其开发为.NET Win 7 风格的文件夹选择对话框的清理版本，由lyquidity.com的 Bill Seddon开发（我没有从属关系）。我自己编写了自己的解决方案，因为他的解决方案需要一个额外的 Reflection 类，该类不需要这个重点目的，使用基于异常的流控制，不缓存其反射调用的结果。请注意，嵌套的静态类是这样的，如果从不调用该方法，则VistaDialog不会尝试填充其静态反射变量。Show
它在 Windows 窗体中的使用方式如下：
var dialog = new FolderSelectDialog {
InitialDirectory = musicFolderTextBox.Text
Title = "Select a folder to import music from"
};
if (dialog.Show(Handle)) {
musicFolderTextBox.Text = dialog.FileName;
}
您当然可以使用它的选项以及它公开的属性。例如，它允许在 Vista 风格的对话框中进行多选。
ErikE的代码在 .NETCore3.1上不起作用（抱歉，没有足够的声誉来发表评论......）。此行必须更改：
private readonly static MethodInfo s_onBeforeVistaDialogMethodInfo = typeof(OpenFileDialog).GetMethod("OnBeforeVistaDialog", c_flags);
它一定要是：
private readonly static MethodInfo s_onBeforeVistaDialogMethodInfo = typeof(FileDialog).GetMethod("OnBeforeVistaDialog", c_flags);
方法“OnBeforeVistaDialog”是在 .NETFramework 4.6 和 .NETCore 3.1 中的“FileDialog”类型上定义的，但似乎反射在 .NETCore 中的工作方式不同。
对于.NET 6，有更多的内部变化：接口“IFileDialog”被移动到程序集“System.Windows.Forms.Primitives”并嵌套在内部类“Interop”、嵌套类“Shell32”中。枚举“FOS”也是如此，这里的值名称也发生了变化。
下面是反射部分的完整代码：
private const BindingFlags c_flags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
private readonly static Assembly s_windowsFormsAssembly = typeof(FileDialog).Assembly;
private readonly static Assembly s_windowsFormsPrimitivesAssembly = Assembly.Load("System.Windows.Forms.Primitives");
private readonly static Type s_iFileDialogType = s_windowsFormsPrimitivesAssembly.GetType("Interop+Shell32+IFileDialog");
private readonly static MethodInfo s_createVistaDialogMethodInfo = typeof(OpenFileDialog).GetMethod("CreateVistaDialog", c_flags);
private readonly static MethodInfo s_onBeforeVistaDialogMethodInfo = typeof(FileDialog).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_windowsFormsPrimitivesAssembly
.GetType("Interop+Shell32+FOS")
.GetField("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");