How to judge certain type of files(suce as csv file) exist using powershell?

Question

I need a function to delete all the csv files in a folder A, if there is csv files in folder A , then delete all the csv files(actually, I don't know the exact csv files' name in folder A); if there is no csv file in folder A , then do nothing. I have searched a topic about removing mp3 files: Powershell - Delete all non mp3 files

then I take the example out and below is the cmdlet that delete my csv files in folder A :

Get-childitem -Recurse | Where-Object {$_.Extension -eq '.csv'} | 
Remove-Item -whatIf

but there is a problem , when there is no csv files in folder A , when excuting above cmd will cause error. I just don't know how to judge if csv file exists, anyone else can help? thx very much.

In your code sample you are deleting all files excluded csv. — CB., Apr 10 '12 at 07:50

score 0 · Accepted Answer · answered Apr 10 '12 at 07:43

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You can simply add -ErrorAction to remove-item to skip the error:

Get-childitem -Recurse | Where-Object {$_.Extension -ne '.csv'} | 
Remove-Item -ErrorAction SilentlyContinue

answered Apr 10 '12 at 07:43

CB.

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think that maybe it's the best method. – CharlieShi Apr 10 '12 at 07:51

score 0 · Answer 2 · answered Apr 11 '12 at 10:49

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Use an if construct to test if a condition is true before executing the deletions:

if(gci c:\folderA -filter *.csv){do-something}

If the statement between the parentheses returns false, the code between the curly braces is not executed.

answered Apr 11 '12 at 10:49

nimizen

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How to judge certain type of files(suce as csv file) exist using powershell?

2 Answers2