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VC下判断文件是否存在

2008年7月16日 发表评论 阅读评论

form:寂寞hacker 个人Blog

方法1:
#include
#include
#include

void main( void )
{
    /* Check for existence */
    if( (_access( “D:\\a.txt”, 0 )) != -1 )
    {
        printf( “File ACCESS.C exists\n” );
        /* Check for write permission */
        if( (_access( “ACCESS.C”, 2 )) != -1 )
           printf( “File ACCESS.C has write permission\n” );
     }
}

方法2:    
if (INVALID_HANDLE_VALUE != CreateFile(“D:\\a.txt”, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL))
{
    AfxMessageBox(“File ACCESS.C exists\n”);
}

方法3:
#define _WIN32_WINNT 0x0400

#include
#include

int main(int argc, char *argv[])
{
    WIN32_FIND_DATA FindFileData;
    HANDLE hFind;

    printf (“Target file is %s.\n”, argv[1]);
    hFind = FindFirstFile(argv[1], &FindFileData);
    if (hFind == INVALID_HANDLE_VALUE)
    {
        printf (“Invalid File Handle. GetLastError reports %d\n”, GetLastError ());
        return (0);
    }
    else
    {
        printf (“The first file found is %s\n”, FindFileData.cFileName);
        FindClose(hFind);
        return (1);
    }
}

方法4:
if (GetFileAttributes(“c:\\1.txt”) == -1)
    MessageBox(0.”Invalid File “,”hehe”,0)
else
    MessageBox(0.”The first file found “,”haha”,0)

方法5:
if (INVALID_HANDLE_VALUE != CreateFile(“D:\\a.txt”, 0, 0, NULL, OPEN_EXISTING, 0, NULL))
{
    AfxMessageBox(“File exists\n”);
}

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本文标题:VC下判断文件是否存在
本文地址:http://www.woyigui.cn/2008/07/16/The-existence-of-documents/

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