有什么方法可以用来列出所有可用的驱动器及其文件夹内容。即我要访问所有驱动器,然后访问每个驱动器中的文件夹,然后访问每个文件夹的子文件夹,依此类推,直到访问每个驱动器中的最后一个级别。
C语言.. Windows平台..我已尝试将字母数组与结合使用,system()
但无法获取文件和文件夹的名称。
这不是“标准C”(即ANSI,C89,C99等),但是它很少使用特定于操作系统的调用(即:仅“ windows.h”,而不是MS .NET或MFC技术)。这是您尝试做的极简主义方法。获得所有驱动器号的列表后,您需要递归查询每个驱动器的目录列表。
这是C和C ++的混合,但是您可能仍会使用Visual Studio的免费版本来构建它。
代码清单-获取驱动器号
#include <windows.h>
#include <stdio.h>
int main()
{
char buf[255];
// get the drive letters as a set of strings
int sz = GetLogicalDriveStrings(sizeof(buf), buf);
if( sz > 0)
{
// buf now contains a list of all the drive letters. Each drive letter is
// terminated with '\0' and the last one is terminated by two consecutive '\0' bytes.
char* p1 = buf;
char* p2;
while( *p1 != '\0' && (p2 = strchr(p1,'\0')) != NULL )
{
printf("%s\n", p1);
p1 = p2+1;
}
}
else
{
// Oops! something went wrong so display the error message
DWORD dwError = GetLastError();
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, dwError, 0, buf, sizeof(buf), 0);
printf("%s\n", buf);
}
}
代码清单-目录清单
#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);
}
参考文献
<http://www.daniweb.com/software-development/c/code/237803/list-windows-logical-drive-letters>
<http://msdn.microsoft.com/en-us/library/windows/desktop/aa365200%28v=vs.85%29.aspx>
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句