//-------------------------------------------------------------------------class Win32API{ // C# representation of the IMalloc interface. [InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("00000002-0000-0000-C000-000000000046")] public interface IMalloc { [PreserveSig] IntPtr Alloc([In] int cb); [PreserveSig] IntPtr Realloc([In] IntPtr pv, [In] int cb); [PreserveSig] void Free([In] IntPtr pv); [PreserveSig] int GetSize([In] IntPtr pv); [PreserveSig] int DidAlloc(IntPtr pv); [PreserveSig] void HeapMinimize(); } [StructLayout(LayoutKind.Sequential, Pack = 8)] public struct BROWSEINFO { public IntPtr hwndOwner; public IntPtr pidlRoot; public IntPtr pszDisplayName; [MarshalAs(UnmanagedType.LPTStr)] public string lpszTitle; public int ulFlags; [MarshalAs(UnmanagedType.FunctionPtr)] public Shell32.BFFCALLBACK lpfn; public IntPtr lParam; public int iImage; } [Flags] public enum BffStyles { RestrictToFilesystem = 0x0001, // BIF_RETURNONLYFSDIRS RestrictToDomain = 0x0002, // BIF_DONTGOBELOWDOMAIN RestrictToSubfolders = 0x0008, // BIF_RETURNFSANCESTORS ShowTextBox = 0x0010, // BIF_EDITBOX ValidateSelection = 0x0020, // BIF_VALIDATE NewDialogStyle = 0x0040, // BIF_NEWDIALOGSTYLE BrowseForComputer = 0x1000, // BIF_BROWSEFORCOMPUTER BrowseForPrinter = 0x2000, // BIF_BROWSEFORPRINTER BrowseForEverything = 0x4000, // BIF_BROWSEINCLUDEFILES } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public class OpenFileName { public int structSize = 0; public IntPtr dlgOwner = IntPtr.Zero; public IntPtr instance = IntPtr.Zero; public String filter = null; public String customFilter = null; public int maxCustFilter = 0; public int filterIndex = 0; public String file = null; public int maxFile = 0; public String fileTitle = null; public int maxFileTitle = 0; public String initialDir = null; public String public int flags = 0; public short fileOffset = 0; public short fileExtension = 0; public String defExt = null; public IntPtr custData = IntPtr.Zero; public IntPtr hook = IntPtr.Zero; public String templateName = null; public IntPtr reservedPtr = IntPtr.Zero; public int reservedInt = 0; public int flagsEx = 0; } public class Shell32 { public delegate int BFFCALLBACK(IntPtr hwnd, uint uMsg, IntPtr lParam, IntPtr lpData); [DllImport("Shell32.DLL")] public static extern int SHGetMalloc(out IMalloc ppMalloc); [DllImport("Shell32.DLL")] public static extern int SHGetSpecialFolderLocation(   IntPtr hwndOwner, int nFolder, out IntPtr ppidl); [DllImport("Shell32.DLL")] public static extern int SHGetPathFromIDList(   IntPtr pidl, byte[] pszPath); [DllImport("Shell32.DLL", CharSet = CharSet.Auto)] public static extern IntPtr SHBrowseForFolder(ref BROWSEINFO bi); } public class User32 { public delegate bool delNativeEnumWindowsProc(IntPtr hWnd, IntPtr lParam); [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern bool EnumWindows(delNativeEnumWindowsProc callback, IntPtr extraData); [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern int GetWindowThreadProcessId(HandleRef handle, out int processId); }}//-------------------------------------------------------------------------class Win32Instance{ //------------------------------------------------------------------------- private HandleRef unityWindowHandle; private bool bUnityHandleSet; //------------------------------------------------------------------------- public IntPtr GetHandle(ref bool bSuccess) { bUnityHandleSet = false; Win32API.User32.EnumWindows(__EnumWindowsCallBack, IntPtr.Zero); bSuccess = bUnityHandleSet; return unityWindowHandle.Handle; } //------------------------------------------------------------------------- private bool __EnumWindowsCallBack(IntPtr hWnd, IntPtr lParam) { int procid; int returnVal =  Win32API.User32.GetWindowThreadProcessId(new HandleRef(this, hWnd), out procid); int currentPID = System.Diagnostics.Process.GetCurrentProcess().Id; HandleRef handle =  new HandleRef(this,   System.Diagnostics.Process.GetCurrentProcess().MainWindowHandle); if (procid == currentPID) {  unityWindowHandle = new HandleRef(this, hWnd);  bUnityHandleSet = true;  return false; } return true; }}//-------------------------------------------------------------------------

//-------------------------------------------------------------------------private void __SelectFolder(out string directoryPath){ directoryPath = "null"; try { IntPtr pidlRet = IntPtr.Zero; int publicOptions = (int)Win32API.BffStyles.RestrictToFilesystem | (int)Win32API.BffStyles.RestrictToDomain; int privateOptions = (int)Win32API.BffStyles.NewDialogStyle; // Construct a BROWSEINFO. Win32API.BROWSEINFO bi = new Win32API.BROWSEINFO(); IntPtr buffer = Marshal.AllocHGlobal(1024); int mergedOptions = (int)publicOptions | (int)privateOptions; bi.pidlRoot = IntPtr.Zero; bi.pszDisplayName = buffer; bi.lpszTitle = "文件夾"; bi.ulFlags = mergedOptions; Win32Instance w = new Win32Instance(); bool bSuccess = false; IntPtr P = w.GetHandle(ref bSuccess); if (true == bSuccess) {  bi.hwndOwner = P; } pidlRet = Win32API.Shell32.SHBrowseForFolder(ref bi); Marshal.FreeHGlobal(buffer); if (pidlRet == IntPtr.Zero) {  // User clicked Cancel.  return; }  byte[] pp = new byte[2048]; if (0 == Win32API.Shell32.SHGetPathFromIDList(pidlRet, pp)) {  return; } int nSize = 0; for (int i = 0; i < 2048; i++) {  if (0 != pp[i])  {  nSize++;  }  else  {  break;  } } if (0 == nSize) {  return; } byte[] pReal = new byte[nSize]; Array.Copy(pp, pReal, nSize); // 關鍵轉碼部分 Gb2312Encoding gbk = new Gb2312Encoding(); Encoding utf8 = Encoding.UTF8; byte[] utf8Bytes = Encoding.Convert(gbk, utf8, pReal); string utf8String = utf8.GetString(utf8Bytes); utf8String = utf8String.Replace("/0", ""); directoryPath = utf8String.Replace("//", "/") + "/"; } catch (Exception e) { Console.WriteLine("獲取文件夾目錄出錯:" + e.Message); }}

Gb2312Encoding gbk = new Gb2312Encoding();Encoding utf8 = Encoding.UTF8;byte[] utf8Bytes = Encoding.Convert(gbk, utf8, pReal);string utf8String = utf8.GetString(utf8Bytes);utf8String = utf8String.Replace("/0", "");