¿Cómo podemos comprobar si existe un archivo o no utilizando el programa Win32?
¿Cómo podemos comprobar si existe un archivo o no utilizando un programa Win32? Estoy trabajando para una aplicación de Windows Mobile.
60
7 answers
Puedes llamar FindFirstFile
.
Aquí hay una muestra que acabo de dejar embarazada:
#include <windows.h>
#include <tchar.h>
#include <stdio.h>
int fileExists(TCHAR * file)
{
WIN32_FIND_DATA FindFileData;
HANDLE handle = FindFirstFile(file, &FindFileData) ;
int found = handle != INVALID_HANDLE_VALUE;
if(found)
{
//FindClose(&handle); this will crash
FindClose(handle);
}
return found;
}
void _tmain(int argc, TCHAR *argv[])
{
if( argc != 2 )
{
_tprintf(TEXT("Usage: %s [target_file]\n"), argv[0]);
return;
}
_tprintf (TEXT("Looking for file is %s\n"), argv[1]);
if (fileExists(argv[1]))
{
_tprintf (TEXT("File %s exists\n"), argv[1]);
}
else
{
_tprintf (TEXT("File %s doesn't exist\n"), argv[1]);
}
}
22
Author: Preet Sangha,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2015-10-15 02:33:03
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2015-10-15 02:33:03
Uso GetFileAttributes
para comprobar que el objeto del sistema de archivos existe y que no es un directorio.
BOOL FileExists(LPCTSTR szPath)
{
DWORD dwAttrib = GetFileAttributes(szPath);
return (dwAttrib != INVALID_FILE_ATTRIBUTES &&
!(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
}
Copiado desde ¿Cómo se comprueba si existe un directorio en Windows en C?
174
Author: Zach Burlingame,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2017-05-23 12:17:39
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2017-05-23 12:17:39
Usted puede hacer uso de la función GetFileAttributes
. Devuelve 0xFFFFFFFF
si el archivo no existe.
31
Author: codaddict,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2018-04-05 09:31:46
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2018-04-05 09:31:46
Qué tal simplemente:
#include <io.h>
if(_access(path, 0) == 0)
... // file exists
15
Author: Pierre,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2015-01-18 15:47:06
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2015-01-18 15:47:06
Otra opción: 'PathFileExists'.
Pero probablemente iría con GetFileAttributes
.
7
Author: Adrian McCarthy,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2012-12-19 22:56:31
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2012-12-19 22:56:31
Puede intentar abrir el archivo. Si falló, significa que no existe en la mayor parte del tiempo.
1
Author: fanzhou,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2012-07-17 04:23:41
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2012-07-17 04:23:41
Otra forma más genérica que no es windows:
static bool FileExists(const char *path)
{
FILE *fp;
fpos_t fsize = 0;
if ( !fopen_s(&fp, path, "r") )
{
fseek(fp, 0, SEEK_END);
fgetpos(fp, &fsize);
fclose(fp);
}
return fsize > 0;
}
-1
Author: Alturis,
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2014-10-24 13:21:02
Warning: date(): Invalid date.timezone value 'Europe/Kyiv', we selected the timezone 'UTC' for now. in /var/www/agent_stack/data/www/ajaxhispano.com/template/agent.layouts/content.php on line 61
2014-10-24 13:21:02