Tip

Validate Filename

This function takes a filename, and determines if it exists in the current
directory. Make sure the directory you want to check in is set by doing a
Chdir "c:\working directory\". Also, this function only checks for nomal
files, it can easily be modified to check hidden files, system files, or even
subdirectories. To use this funciton:
If IsFile("test.txt") then
'// do stuff
else
'// do other stuff
end if
(Options)
%Include "lsconst"

Function IsFile(FileName As String) As Variant

'*******************************************************************************
***
'* Determines if filename passed exists in the current working directory

'*******************************************************************************
***
'********************
'* Local Variables
'********************
Redim File(0) As Variant '// Will hold all files in current directory
Dim i As Integer '// used for looping
Dim temp As String
'******************************************************
'* First thing we need to do is set IsFile to false
'******************************************************
IsFile = False
'******************************************************************************
'* First thing we need to do is get a listing of all files in the directory
'******************************************************************************
File(0) = Dir( ( Curdir() & "\*.*" ) , ATTR_NORMAL)
i = 0
Do While File(i) <> ""
Redim Preserve File(Ubound(File) + 1)
i = i + 1
File(i) = Dir()
Loop
'************************************************************************
'* Now go through array and see if filename passed is in there
'************************************************************************
For i = 0 To Ubound( File )
If Ucase( File(i) ) = Ucase( FileName ) Then
'// We found a match, set IsFile to true and exit loop
IsFile = True
Exit For
End If
Next

End Function

This was first published in November 2000

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