VC ++：如何获取文件的时间和日期？

How do I get the file size and date stamp of a file on Windows in C++, given its path?

如何在C ++中获取文件的文件大小和日期戳,并给出其路径?

4 个解决方案

#1

You can use FindFirstFile() to get them both at once, without having to open it (which is required by GetFileSize() and GetInformationByHandle()). It's a bit laborious, however, so a little wrapper is helpful

您可以使用FindFirstFile()同时获取它们,而无需打开它(这是GetFileSize()和GetInformationByHandle()所必需的)。然而,它有点费力,所以一点点包装是有帮助的

bool get_file_information(LPCTSTR path, WIN32_FIND_DATA* data)
{
  HANDLE h = FindFirstFile(path, &data);
  if(INVALID_HANDLE_VALUE != h) {
    return false;
  } else {
    FindClose(h);
    return true;
  }
}

Then the file size is available in the nFileSizeHigh and nFileSizeLow members of WIN32_FIND_DATA, and the timestamps are available in the ftCreationTime, ftLastAccessTime and ftLastWriteTime members.

然后文件大小在WIN32_FIND_DATA的nFileSizeHigh和nFileSizeLow成员中可用,并且时间戳在ftCreationTime,ftLastAccessTime和ftLastWriteTime成员中可用。

#2

You could also use POSIX stat, if you were looking for portability. Windows still supports its use.

如果您正在寻找可移植性,也可以使用POSIX stat。 Windows仍支持其使用。

#3

GetFileSize/GetFileSizeEx and GetFileInformationByHandleEx with FileBasicInfo can be used to retrieved this information.

使用FileBasicInfo的GetFileSize / GetFileSizeEx和GetFileInformationByHandleEx可以用于检索此信息。

Both functions take a handle, so you need to use CreateFile on the path prior to calling these functions.

这两个函数都有一个句柄,因此您需要在调用这些函数之前在路径上使用CreateFile。

// Error handling removed for brevity
HANDLE hFile = CreateFile(path, GENERIC_READ, FILE_SHARE_READ,
                 NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

LARGE_INTEGER fileSize;
GetFileSizeEx(hFile, &fileSize);

FILE_BASIC_INFO fileInfo);
GetFileInformationByHandle(hFile, FileBasicInfo, fileInfo, sizeof(fileInfo));

// fileInfo.CreationTime is when file was created.

#4

To append the other answer, you call GetFileTime to get just the file times. This API also requries a handle and I think is easier than GetFileInformationByHandle API. BTW the GetFileInformationByHandleEx is only supported in VISTA and above.

要附加其他答案,请调用GetFileTime以获取文件时间。这个API也需要一个句柄,我认为比GetFileInformationByHandle API更容易。 BTW GetFileInformationByHandleEx仅在VISTA及更高版本中受支持。

#1