VC检测文件存在的几种方法

方法一：FindFirstFile

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1WIN32_FIND_DATA m_data;

2HANDLE hFile;

3hFile=FindFirstFile(filename,&m_data)

4if(hFile==INVALID_HANDLE_VALUE) //file not found

5    //Make sure you close the handle if the file is found.

6    FindClose(hFile);

 

方法二：SHGetFileInfo

函数原型如下：

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1DWORD_PTR SHGetFileInfo(

2LPCTSTR pszPath,

3DWORD dwFileAttributes,

4SHFILEINFO *psfi,

5UINT cbFileInfo,

6UINT uFlags

7);

方法三：PathFileExists

 

//请注意：为了使用API函数PathFileExists()，需要加入shlqapi头文件和lib
 

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1#include "Shlwapi.h"

2 #pragma comment(lib,"shlwapi.lib")

3 if(PathFileExists(str))

4 {

5  CString strTemp;

6  strTemp.Format("%s已存在!",str);

7  AfxMessageBox(strTemp);

8  return ;

9 }

 

方法四：标准c库函数_access

 

From MSDN

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01/* ACCESS.C: This example uses _access to check the

02 * file named "ACCESS.C" to see if it exists and if

03 * writing is allowed.

04 */

05  

06#include  <io.h>

07#include  <stdio.h>

08#include  <stdlib.h>

09  

10void main( void )

11{

12   /* Check for existence */

13   if( (_access( "ACCESS.C", 0 )) != -1 )

14   {

15      printf( "File ACCESS.C exists/n" );

16      /* Check for write permission */

17      if( (_access( "ACCESS.C", 2 )) != -1 )

18         printf( "File ACCESS.C has write permission/n" );

19   }

20}