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c++ - 如何使用 C++ 在 Windows 中列出子目录？我需要单独使用 Windows API 的解决方案

转载 作者：塔克拉玛干 更新时间：2023-11-03 07:55:02 27 4
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http://msdn.microsoft.com/en-us/library/windows/desktop/aa365200%28v=vs.85%29.aspx .我刚刚看到这个链接，这个程序将单独打印目录。如何在这个程序中实现一个代码来显示所有子目录？你能以代码的形式给出解决方案吗？ 

 #include <windows.h>
    #include <tchar.h> 
    #include <stdio.h>
    #include <strsafe.h>
    #pragma comment(lib, "User32.lib")

    void DisplayErrorBox(LPTSTR lpszFunction);

    int _tmain(int argc, TCHAR *argv[])
    {
       WIN32_FIND_DATA ffd;
       LARGE_INTEGER filesize;
       TCHAR szDir[MAX_PATH];
       size_t length_of_arg;
       HANDLE hFind = INVALID_HANDLE_VALUE;
       DWORD dwError=0;

       // If the directory is not specified as a command-line argument,
       // print usage.

       if(argc != 2)
       {
          _tprintf(TEXT("\nUsage: %s <directory name>\n"), argv[0]);
          return (-1);
       }

       // Check that the input path plus 3 is not longer than MAX_PATH.
       // Three characters are for the "\*" plus NULL appended below.

       StringCchLength(argv[1], MAX_PATH, &length_of_arg);

       if (length_of_arg > (MAX_PATH - 3))
       {
          _tprintf(TEXT("\nDirectory path is too long.\n"));
          return (-1);
       }

       _tprintf(TEXT("\nTarget directory is %s\n\n"), argv[1]);

       // Prepare string for use with FindFile functions.  First, copy the
       // string to a buffer, then append '\*' to the directory name.

       StringCchCopy(szDir, MAX_PATH, argv[1]);
       StringCchCat(szDir, MAX_PATH, TEXT("\\*"));

       // Find the first file in the directory.

       hFind = FindFirstFile(szDir, &ffd);

       if (INVALID_HANDLE_VALUE == hFind) 
       {
          DisplayErrorBox(TEXT("FindFirstFile"));
          return dwError;
       } 

       // List all the files in the directory with some info about them.

       do
       {
          if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
          {
             _tprintf(TEXT("  %s   <DIR>\n"), ffd.cFileName);
          }
          else
          {
             filesize.LowPart = ffd.nFileSizeLow;
             filesize.HighPart = ffd.nFileSizeHigh;
             _tprintf(TEXT("  %s   %ld bytes\n"), ffd.cFileName, filesize.QuadPart);
          }
       }
       while (FindNextFile(hFind, &ffd) != 0);

       dwError = GetLastError();
       if (dwError != ERROR_NO_MORE_FILES) 
       {
          DisplayErrorBox(TEXT("FindFirstFile"));
       }

       FindClose(hFind);
       return dwError;
    }


    void DisplayErrorBox(LPTSTR lpszFunction) 
    { 
        // Retrieve the system error message for the last-error code

        LPVOID lpMsgBuf;
        LPVOID lpDisplayBuf;
        DWORD dw = GetLastError(); 

        FormatMessage(
            FORMAT_MESSAGE_ALLOCATE_BUFFER | 
            FORMAT_MESSAGE_FROM_SYSTEM |
            FORMAT_MESSAGE_IGNORE_INSERTS,
            NULL,
            dw,
            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
            (LPTSTR) &lpMsgBuf,
            0, NULL );

        // Display the error message and clean up

        lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT, 
            (lstrlen((LPCTSTR)lpMsgBuf)+lstrlen((LPCTSTR)lpszFunction)+40)*sizeof(TCHAR)); 
        StringCchPrintf((LPTSTR)lpDisplayBuf, 
            LocalSize(lpDisplayBuf) / sizeof(TCHAR),
            TEXT("%s failed with error %d: %s"), 
            lpszFunction, dw, lpMsgBuf); 
        MessageBox(NULL, (LPCTSTR)lpDisplayBuf, TEXT("Error"), MB_OK); 

        LocalFree(lpMsgBuf);
        LocalFree(lpDisplayBuf);
    }

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