Hi,

I have been using the code below to prompt the user to select from a choice of options. I got this code from http://www.microsoft.com/technet/sc...p0125.mspx. However, I'm having trouble removing the default option. Everything I've read online (although not in this article) says that to not set a default, you can specify the final argument to PromptForChoice as -1. When I do this I get the following exeption:

Exception calling "PromptForChoice" with "4" argument(s): ""defaultChoice" must be a valid index into "choice". Parameter name: defaultChoice Actual value was -1."

I've tried various combinations without success. Any suggestions as to where I'm going wrong would be much appreciated!

Thanks,


Nigel

I tested this out, and it appears that in PowerShell v1, that value is required to be a valid index number, you are "required" to have a default choice.

You'll need to upgrade to v2 in order to use the function that you desire.

K.I.S.S... I wouldn't bother muckin with Host.UI if your using V1.

$v1Confirm = ""
while ($v1Confirm -eq "") {
    switch (Read-Host "Are you sure(Y/N)") {
        "yes" {$v1Confirm = "yes"}
        "no" {$v1Confirm = "No"}
        "y" {$v1Confirm = "yes"}
        "n" {$v1Confirm = "No"}
        default {Write-Host "Invalid selection, please try again"}
    }
}
if ($v1Confirm -eq "yes") { Write-Host "do something!" }

Also if you did decide to use V2 take advantage of the ShouldProcess support in script cmdlets.  Wrap your destructive action in a script cmdlet and set the default confirm impact... ala

Cmdlet Write-Message -SupportsShouldProcess -ConfirmImpact high {
    param ([string]$message)
    process {
        if (($pscmdlet.ShouldProcess($env:username, "Send message $message"))){
            Write-Host $message
        }
    }
}

Write-Message "do Something!"

Hope that helps
~Glenn