24 windows_24_windows_file 文件系统 - 文件

// windows_24_windows_file.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <windows.h>
void Create( )
{
  //创建文件
  HANDLE hFile = CreateFile( "D:\\MyTest.txt", 
    GENERIC_READ | GENERIC_WRITE,
    0/*独占模式*/, 
    NULL, 
    CREATE_ALWAYS, 
    FILE_ATTRIBUTE_NORMAL,
    NULL );
  //关闭文件
  CloseHandle( hFile );
}
//写数据
void Write( )
{
  //打开文件
  HANDLE hFile = CreateFile( "D:\\MyTest.txt",
    GENERIC_WRITE,
    0,
    NULL,
    OPEN_EXISTING,
    FILE_ATTRIBUTE_NORMAL,
    NULL );
  if (hFile == NULL)
  {
    printf( "error:handle\n" );
    return;
  }
  //写入数据
  CHAR szBuff[] = "Hello File";
  DWORD nWritten = 0;
  WriteFile( hFile, szBuff, strlen( szBuff ), &nWritten, NULL );
  //关闭文件
  CloseHandle( hFile );
}
void Read( )
{
  //打开文件
  HANDLE hFile = CreateFile( "D:\\MyTest.txt",
    GENERIC_READ,
    0,
    NULL,
    OPEN_EXISTING,
    FILE_ATTRIBUTE_NORMAL,
    NULL );
  //获取文件长度
  DWORD nHigh = 0;
  DWORD nLow = GetFileSize( hFile, &nHigh );
  //分配空间
  LPSTR pszBuf = (LPSTR)malloc( nLow + 1 );
  memset( pszBuf, 0, nLow + 1 );
  //设置当前读取的位置 
  SetFilePointer( hFile, 1, NULL, FILE_BEGIN );
  //读取数据
  DWORD nRead = 0;
  ReadFile( hFile, pszBuf, nLow + 1, &nRead, NULL );
  printf( "%s", pszBuf );
  free( pszBuf );
  //关闭文件
  CloseHandle( hFile );
}
//操作
void Operate( )
{
  //复制文件
  CopyFile( "D:\\MyTest.txt", "D:\\MyTest1.txt", FALSE );
  //删除文件
  DeleteFile( "D:\\MyTest.txt" );
}
//打印时间
void PrintFileTime( LPSTR pszName, LPFILETIME pFileItem )
{
  //转换成本时区时间
  FileTimeToLocalFileTime(
    pFileItem,  // pointer to UTC file time to convert
    pFileItem   // pointer to converted file time
    );
  //将文件时间转换成系统时间
  SYSTEMTIME systime = { 0 };
  FileTimeToSystemTime( pFileItem, &systime );
  printf( "\n%s %d-%d-%d  %d:%d:%d", pszName, systime.wYear, systime.wMonth,
    systime.wDay, systime.wHour, systime.wMinute, systime.wSecond );
}
//获取属性
void Attri( )
{
  //获取文件的基本属性
  DWORD nAttri = GetFileAttributes( "D:\\MyTest1.txt" );
  printf( "nAttri = %0X\n", nAttri );
  //获取文件的属性信息
  WIN32_FILE_ATTRIBUTE_DATA data = { 0 };
  GetFileAttributesEx( "D:\\MyTest1.txt", GetFileExInfoStandard, &data );
  printf( "\nAttri=%d", data.dwFileAttributes );
  printf( "\nSizeHigh=%d", data.nFileSizeHigh );
  printf( "\nSizeLow=%d",data.nFileSizeLow  );
  PrintFileTime( "\nCreateTime:", &data.ftCreationTime );
  PrintFileTime( "\nCreateTime:", &data.ftLastAccessTime );
  PrintFileTime( "\nCreateTime:", &data.ftLastWriteTime );
}
int _tmain(int argc, _TCHAR* argv[])
{
  Create( );
  Write( );
  Read( );
  Operate( );
  Attri( );
	return 0;
}