gan*_*cpp 4 c++ datetime file file-properties
我有以下代码:
int main(int argc, char** argv) {
onelog a;
std::cout << "a new project";
//creates a file as varuntest.txt
ofstream file("C:\\users\\Lenovo\\Documents\\varuntest.txt", ios::app);
SYSTEMTIME thesystemtime;
GetSystemTime(&thesystemtime);
thesystemtime.wDay = 07;//changes the day
thesystemtime.wMonth = 04;//changes the month
thesystemtime.wYear = 2012;//changes the year
//creation of a filetimestruct and convert our new systemtime
FILETIME thefiletime;
SystemTimeToFileTime(&thesystemtime,&thefiletime);
//getthe handle to the file
HANDLE filename = CreateFile("C:\\users\\Lenovo\\Documents\\varuntest.txt",
FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL);
//set the filetime on the file
SetFileTime(filename,(LPFILETIME) NULL,(LPFILETIME) NULL,&thefiletime);
//close our handle.
CloseHandle(filename);
return 0;
}
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现在的问题是; 它只在我检查文件属性时更改修改日期.我需要问;
如何更改文件的创建日期而不是修改日期?
谢谢
请给这个新手一些代码.
它设置了上次修改时间,因为这就是您要求它执行的操作.该函数接收3个文件时参数,您只将值传递给最后一个,lpLastWriteTime.要设置创建时间,请调用以下函数:
SetFileTime(filename, &thefiletime, (LPFILETIME) NULL,(LPFILETIME) NULL);
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我建议你阅读一下文档SetFileTime.关键部分是其签名如下:
BOOL WINAPI SetFileTime(
__in HANDLE hFile,
__in_opt const FILETIME *lpCreationTime,
__in_opt const FILETIME *lpLastAccessTime,
__in_opt const FILETIME *lpLastWriteTime
);
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既然你说你是Windows API的新手,我会给你一个提示.MSDN上的文档非常全面.每当您遇到Win32 API调用时,请在MSDN上查找.
以及对您的代码的一些评论:
filename实际上应该被命名fileHandle.