Simplify Your PowerShell Script with Parameter Validation

re: Simplify Your PowerShell Script with Parameter Validation

i.biswajith — Sun, 16 Jun 2013 09:55:35 GMT

Awesome for param.

re: Simplify Your PowerShell Script with Parameter Validation

Craig Lussier — Wed, 06 Feb 2013 05:36:31 GMT

Great post - your notes came in handy today :)

re: Simplify Your PowerShell Script with Parameter Validation

jrv — Sun, 21 Oct 2012 20:27:36 GMT

#requires -version 2.0

function t{

param(

[ValidateRange(21,65)]$x

)

}

t 3 # fails

t 21 # succeeds

re: Simplify Your PowerShell Script with Parameter Validation

Panayot — Sun, 21 Oct 2012 19:43:24 GMT

Is that example for PS2? As am geting error if I use [ValidateRange(21,65)]

re: Simplify Your PowerShell Script with Parameter Validation

jrv — Fri, 02 Mar 2012 20:55:30 GMT

function Test-Msg{

Param(

[Parameter(

Mandatory=$true,

HelpMessage='Count of things in the world'

)][string]$count

)

# body here

}

Test-Msg # and follow instructions on the screen

re: Simplify Your PowerShell Script with Parameter Validation

st9912345 — Fri, 02 Mar 2012 20:29:52 GMT

This is great. Can you additional add in text to decribe what the parameters are for?

ie.

0 - extracts data for people data

1 - extracts data for vendor data

re: Simplify Your PowerShell Script with Parameter Validation

Ed Wilson — Thu, 04 Aug 2011 20:50:20 GMT

@JRV Error variable is a good one. Great suggestion.

re: Simplify Your PowerShell Script with Parameter Validation

jrv — Thu, 04 Aug 2011 09:30:52 GMT

Don't forget ErrorVariable!

help common

# list non-existent folder causing an error

Get-Content xxxx -ea SilentlyContinue -ev +MyError

$MyError

Look Ma! No red lines anymore. My errors have turned white.

Good Luck and have fun.

re: Simplify Your PowerShell Script with Parameter Validation

Ed Wilson — Thu, 04 Aug 2011 04:00:53 GMT

@Will Steele You can also set -erroractionpreference (parameter alias -EA) on each PowerShell cmdlet. You also have the Try / Catch / Finally construction that can be used for structured error handling. Look at the PowerShell / Error Handling tags on the Hey Scripting Guy blog for some articles around these topics.

re: Simplify Your PowerShell Script with Parameter Validation

Will Steele — Thu, 04 Aug 2011 03:20:44 GMT

Aside from altering the $ErrorActionPreference is there a way to handle errors that results from failed validation? For instance, if I have a non-terminating error, how would I be able to continue processing and just note the issue to an ErrorVariable?