C#使用SHBrowseForFolder导出中文文件夹的示例-创新互联
这篇文章主要介绍C#使用SHBrowseForFolder导出中文文件夹的示例,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
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 title = null; 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; } } //-------------------------------------------------------------------------
简单介绍一下 Win32API 所有接口的结构体 都是参照SHBrowseForFolder函数而写 , Win32Instance 主要是精确的获取当前进程的ID
接下来是 获取文件夹路径的简单例子
//------------------------------------------------------------------------- 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 = "文件夹"; 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); // 关键转码部分 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("获取文件夹目录出错:" + e.Message); } }
以上用到的一个GBK转码库 位置查看 - github传送门
0x01.GBK转码
以下是关键的一段代码:
Gb2312Encoding gbk = new Gb2312Encoding(); Encoding utf8 = Encoding.UTF8; byte[] utf8Bytes = Encoding.Convert(gbk, utf8, pReal); string utf8String = utf8.GetString(utf8Bytes); utf8String = utf8String.Replace("\0", "");
谷歌上找到的一个方案是把项目编码全部改为unicode , 但是C#项目里貌似没这个设定 , 所以使用SHGetPathFromIDList拿出的数据直接转码即可支持中文.(全部为英文的路径也不会有影响)
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文章题目:C#使用SHBrowseForFolder导出中文文件夹的示例-创新互联
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