FileExists
Tests the existence of a file
#include "file.bi"
result = FileExists( filename )
or
#include "vbcompat.bi"
result = FileExists( filename )
filename
Returns non-zero (-1) if the file exists, otherwise returns zero (0).
FileExists tests for the existence of a file.
Internally, it may issue an Open() and a Close() function, which may have consequences - eg, any existing Lock(s) on the file may be released.
Depending on the exact requirements, alternative methods of checking for file existence may be to use the Dir() function (being careful of attributes and ensuring the path doesn't contain wildcards), or to try Opening the file and checking the return value for success.
Syntax
Usage
#include "file.bi"
result = FileExists( filename )
or
#include "vbcompat.bi"
result = FileExists( filename )
Parameters
filename
Filename to test for existence.
Return Value
Returns non-zero (-1) if the file exists, otherwise returns zero (0).
Description
FileExists tests for the existence of a file.
Internally, it may issue an Open() and a Close() function, which may have consequences - eg, any existing Lock(s) on the file may be released.
Depending on the exact requirements, alternative methods of checking for file existence may be to use the Dir() function (being careful of attributes and ensuring the path doesn't contain wildcards), or to try Opening the file and checking the return value for success.
Example
#include "vbcompat.bi"
Dim filename As String
Print "Enter a filename: "
Line Input filename
If FileExists( filename ) Then
Print "File found: " & filename
Else
Print "File not found: " & filename
End If
Dim filename As String
Print "Enter a filename: "
Line Input filename
If FileExists( filename ) Then
Print "File found: " & filename
Else
Print "File not found: " & filename
End If
Platform Differences
- Linux requires the filename case matches the real name of the file. Windows and DOS are case insensitive.
- Path separators in Linux are forward slashes /. Windows uses backward slashes \ but it allows for forward slashes. DOS uses backward \ slashes.
Differences from QB
- New to FreeBASIC
See also
