Powershell: get-childitem doesn't work for filters

Question

I've got 3 ps1 files under d:

-a---         6/19/2015   2:52 PM        104 Untitled1.ps1                                                                                                                       
-a---         6/19/2015   2:56 PM        204 Untitled2.ps1                                                                                                                       
-a---         6/16/2015   1:17 PM       3073 Untitled3.ps1  

I can use get-childitem to retrive them:

get-childitem d:\

But this fails:

 get-childitem d:\ -Force -Include *.ps1

This command doesn't show any thing. Why? I just want to filter out .ps1 file. Anything wrong with my command?

Answer 1

The Include parameter is effective only when the command includes the Recurse parameter or the path leads to the contents of a directory, such as C:\Windows*, where the wildcard character specifies the contents of the C:\Windows directory.

Source: https://technet.microsoft.com/en-us/library/hh849800.aspx

You can use the -Filter parameter instead:

Get-ChildItem -Path 'd:\' -Filter '*.ps1'

Or if you need to filter multiple extensions, use the wildcard character:

Get-ChildItem -Path 'd:\*' -Include '*.ps1', '*.bat'