请问怎么用CreateFile WriteFile创建与写入一个文件,急!!!
请问怎么用CreateFile WriteFile创建与写入一个文件 (Win32下)
比如我要在C盘创建一个hello.txt写入的内容是 "hello! "
请问具体写法,急呀,,,
[解决办法]
#include <windows.h>
#include <stdio.h>
#define BUFSIZE 4096
int main()
{
HANDLE hFile;
HANDLE hTempFile;
DWORD dwBytesRead, dwBytesWritten, dwBufSize=BUFSIZE;
char szTempName[MAX_PATH];
char buffer[BUFSIZE];
char lpPathBuffer[BUFSIZE];
// Open the existing file.
hFile = CreateFile( "original.txt ", // file name
GENERIC_READ, // open for reading
0, // do not share
NULL, // default security
OPEN_EXISTING, // existing file only
FILE_ATTRIBUTE_NORMAL, // normal file
NULL); // no template
if (hFile == INVALID_HANDLE_VALUE)
{
printf( "Could not open file. ");
return 0;
}
// Get the temp path
GetTempPath(dwBufSize, // length of the buffer
lpPathBuffer); // buffer for path
// Create a temporary file.
GetTempFileName(lpPathBuffer, // directory for temp files
"NEW ", // temp file name prefix
0, // create unique name
szTempName); // buffer for name
hTempFile = CreateFile((LPTSTR) szTempName, // file name
GENERIC_READ | GENERIC_WRITE, // open for read/write
0, // do not share
NULL, // default security
CREATE_ALWAYS, // overwrite existing file
FILE_ATTRIBUTE_NORMAL, // normal file
NULL); // no template
if (hTempFile == INVALID_HANDLE_VALUE)
{
printf( "Could not create temporary file. ");
return 0;
}
// Read 4K blocks to the buffer.
// Change all characters in the buffer to upper case.
// Write the buffer to the temporary file.
do
{
if (ReadFile(hFile, buffer, 4096,
&dwBytesRead, NULL))
{
CharUpperBuff(buffer, dwBytesRead);
WriteFile(hTempFile, buffer, dwBytesRead,
&dwBytesWritten, NULL);
}
} while (dwBytesRead == BUFSIZE);
// Close both files.
CloseHandle(hFile);
CloseHandle(hTempFile);
// Move the temporary file to the new text file.
if (!MoveFileEx(szTempName,
"allcaps.txt ",
MOVEFILE_REPLACE_EXISTING))
{
printf( "Could not move temp file. ");
return 0;
}
}
msdn 里面的例子
