Function to check if “C:\\myFile.txt” exists

[d00ape]

I know there is a small function that checks if a file exists but I can’t find it.

 

[ArkM]

Non-standard library function _access() from io.h header:

#include <io.h>
...
if (_access(filepath,0) != 0) 
{
// No such file
}

A portable way to check file existence:

#include <cstdio>
bool isExist(const char* filepath)
{
  FILE* f = 0;
  if (filepath && (f=fopen(filepath,"r")) != 0)
    fclose(f);
  return f != 0;
}

 

[shetlandbob]

bool FileIO::CheckFileExists ( CString path )
{
  WIN32_FIND_DATA data;
  HANDLE hFile = FindFirstFile( path, &data );

  if ( hFile == INVALID_HANDLE_VALUE ) // directory doesn't exist
    return (FALSE);
  else 
  {
    // is it folder or file?
    FindClose(hFile);
    if ( data.dwFileAttributes ) return ( true );
  }
  return ( false );
}

 

[PerFnurt]

Note: Beeing able to see the file doesn't necessarily mean you have the rights to access it.

If you mean to check if it exists but also access it in some manner, use CreateFile with the OPEN_EXISTING flag set.

See

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/createfile.asp

Windows API and thus not as portable as ArkM's suggestion. But, hey, who cares ;-)

/Per

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