Test-FileOpen

1. <# 
2. .SYNOPSIS 
3.     This script defines a function that tests to 
4.     see if a file is open. 
5. .DESCRIPTION 
6.     This script used the System.Io.FileStream class  
7.     and the FileInfo class to try to open a file 
8.     stream for write. If it fails, we return $false, 
9.     else we close the file and return $True 
10. .NOTES 
11.     File Name  : Test-FileOpen.ps1 
12.     Author     : Thomas Lee - tfl@psp.co.uk 
13.     Requires   : PowerShell Version 2.0 
14. .LINK 
15.     This script posted to: 
16.         http://www.pshscripts.blogspot.com 
17. .EXAMPLE 
18.     Psh[Cookham8:C:\foo]> $file = New-Object -TypeName System.IO.FileInfo C:\foo\doc1.docx 
19.     Psh[Cookham8:C:\foo]>Test-FileOpen $file 
20.     True 
21. #> 
22.  
23. Function Test-FileOpen { 
24.  
25. Param ( 
26. $fileName = $(Throw '***** No File specified')  
27. ) 
28.  
29. $ErrorActionPreference = "SilentlyContinue" 
30. [System.IO.FileStream] $fs = $file.OpenWrite();  
31. if (!$?) {$true} 
32. else {$fs.Dispose();$false} 
33. } 
34.  
35. # Test the function 
36. $file = New-Object -TypeName System.IO.FileInfo C:\foo\doc1.docx 
37. Test-FileOpen $file 

Technorati Tags: System.Io.Filestream,System.Io.FileInfo,PowerShell,File Open