This is very simple... why first command working and second no?
Findstr looks to me for best use in "dos"like commands and not in powershell.
Get-AppXProvisionedPackage -online | findstr ^DisplayName
Get-AppXProvisionedPackage -online | Select-String -pattern "DisplayName"
findstr is an operating system executable (
findstr.exe actually), which you can see from within PowerShell:
CommandType Name Version Source ----------- ---- ------- ------ Application findstr.exe 10.0.10... C:\WINDOWS\system32\findstr.exe
Select-String is similar but more powerful and is a native PowerShell cmdlet
CommandType Name Version Source ----------- ---- ------- ------ Cmdlet Select-String 126.96.36.199 Microsoft.PowerShell.Utility
They don't work exactly the same though or take the same input.
Select-String is generally better for use in PowerShell, but check the help to see how it works.
As Mathias pointed out, for what you're doing, you probably want
Get-AppXProvisionPackage -online |Select-Object DisplayName
PowerShell cmdlets often return objects with various properties, and the stylized format you see is for display, but you can access properties programatically without using string parsing.
Select-Object is one way, another is to use dot
$pkg = Get-AppXProvisionPackage -online $pkg.DisplayName