Powershell cannot pass in command line string parameter

Question

\I have tried everything I can find on the web but I just can't make this work.... Really frustrating. All I want to do is to pass in a file name in the command line to my Powershell script test.ps1.

param([String]$input=$args[0])
$inputpath = 'C:\work\'
$inputfile = $($inputpath + $input+".txt")

I run the script like:

powershell .\test.ps1 "input"

However, the in the error message I print out, I keep getting "cannot find c:\work\.txt". Apparently my command line parameter isn't in there correctly. Can someone please help?

shouldn't the error be can't find c:\work\.txt? if $input isn't defined in there, powershell wouldn't magically strip off the trailing backslash in $inputpath. — Marc B
– Marc B, Commented Jul 10, 2013 at 16:22
You're right. just edited. I didn't know I needed to put "\\" for the "\" to show up in stackoverflow. — user2502206
– user2502206, Commented Jul 10, 2013 at 16:25
It works when I hard code the file name in the script. But I want to learn how to pass in the file name in command line. — user2502206
– user2502206, Commented Jul 10, 2013 at 16:28

tkokasih · Accepted Answer · 2013-07-10 16:32:40Z

4

Try to change $Input into some other name. Because $Input is used for Pipeline variable.

See for example:

http://blogs.technet.com/b/heyscriptingguy/archive/2010/12/31/write-powershell-functions-that-accept-pipelined-input.aspx

answered Jul 10, 2013 at 16:32

tkokasih

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Ansgar Wiechers · Accepted Answer · 2013-07-10 16:37:22Z

0

I'd simply use this for building the path:

$inputpath = 'C:\work\'
$inputfile = Join-Path $inputpath ($args[0] + ".txt")

answered Jul 10, 2013 at 16:37

Ansgar Wiechers

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