C#如何使用SHBrowseForFolder导出中文文件夹详解

前言

从业以来,数次踩中编码的坑, 这次又马失前蹄 , 真是事不过三此非彼白.

本来这个小问题不打算拿出来说 , 但是翻看谷歌发现若干年前也有寥寥数人遇到碰到这个问题 ,而且都并没有给出一个可行的解决方案 ,现在问题依然挂在CSDN等地方 , 似乎不会再有人去回答了, 或者其实题主们后面解决了但并没有回头来提供解决方案. 现在由我来”终结此贴”

SHBrowseForFolder是一个可以用于获取文件夹路径的Windows API。使用起来可以方便很多，文中将详细介绍关于C#使用SHBrowseForFolder导出中文文件夹的相关内容 ，下面话不多说了，来一起看看详细的介绍吧

0x00.使用SHBrowseForFolder选择文件夹

(大段代码来袭 , 不想看可直接拉到底看关键的几行)

底层接口 – 选择文件夹相关

//-------------------------------------------------------------------------
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;
 }
}
//-------------------------------------------------------------------------								 
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