CODEWITHSUNDEEP
powershell
Cheries
Cheries

Reputation: 892

How to find a string in a folder and return the value using PowerShell?

I want to match a string inside a file. If it matched, it will return the path of the file, if it is not matched it will return false. Using this code I can match and find the path if the string match, but if the string doesn't match it returns this error:

Get-Item : Cannot bind argument to parameter 'Path' because it is null.

$Path = "D:\190\Pro"
$SS = "1q1q"
$Paths = (Get-Item (Get-ChildItem "$Path\*\LST" | Select-String -Pattern "$SS").Path).Directory.FullName
if ($Paths) {
    Write-Host "Found Path"
    #Do next process
} else {
    Write-Host "Not Found Path"
    #Do next process
}

Upvotes: 0

Views: 212

Answers (1)

Ansgar Wiechers
Ansgar Wiechers

Reputation: 200193

If Get-ChildItem | Select-String doesn't produce a match you have an empty result in the nested expression. Passing that empty result to Get-Item will essentially run Get-Item $null, which throws the error you observed, because the -Path parameter of that cmdlet doesn't accept $null as an argument.

Replace the needlessly convoluted

$Paths = (Get-Item (Get-ChildItem "$Path\*\LST" | Select-String -Pattern "$SS").Path).Directory.FullName

with

$Paths = Get-ChildItem "$Path\*\LST" |
         Where-Object { Select-String -Path $_.FullName -Pattern "$SS" } |
         Select-Object -Expand DirectoryName

and the problem will disappear.

Upvotes: 1

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