CFile::SetFilePath
Call this function to specify the path of the file; for example, if the path of a file is not available when a CFile object is constructed, call SetFilePath to provide it.
virtual void SetFilePath(
LPCTSTR lpszNewName
);
Parameters
- lpszNewName
Pointer to a string specifying the new path.
Remarks
备注
SetFilePath does not open the file or create the file; it simply associates the CFile object with a path name, which can then be used.
Example
TCHAR* pstrName = _T("C:\\test\\SetPath_File.dat");
// open a file
HANDLE hFile = ::CreateFile(pstrName, GENERIC_WRITE, FILE_SHARE_READ,
NULL, CREATE_ALWAYS, 0, NULL);
if (hFile != INVALID_HANDLE_VALUE)
{
// attach a CFile object to it
CFile myFile(hFile);
// At this point, myFile doesn't know the path name for the file
// it owns because Windows doesn't associate that information
// with the handle. Any CFileExceptions thrown by this object
// won't have complete information.
// Calling SetFilePath() remedies that problem by letting CFile
// know the name of the file that's associated with the object.
myFile.SetFilePath(pstrName);
// write something to the file and flush it immediately
DWORD dwValue = 1234;
myFile.Write(&dwValue, sizeof(dwValue));
myFile.Flush();
// destroying the CObject here will call ::CloseHandle() on the file
}
Requirements
Header: afx.h