当存在另一个参数时，在 PowerShell 中需要参数 [英] Requiring parameters in PowerShell when another parameter is present

问题描述

到目前为止我所读到的一切都告诉我这应该有效.这旨在成为自动转出 AD 帐户的脚本.我希望它如何工作，如果设置了 -TransferHomeDrive 开关，那么它将需要旧服务器和新服务器的名称.

Everything I have read so far tells me that this should work. This is intended to be a script for automating the transfer out of AD accounts. How I would like it to work is if the -TransferHomeDrive switch is set, then it will require names for the old server and new server.

我相信我应该能够使用参数集来做到这一点，但是如果我只有一个参数集，加上默认参数，它总是会提示我输入新旧服务器.这是我的 param 声明:

I believe I should be able to do this with a parameter set, however if I just have the single parameter set, plus the default parameters, it will always prompt me for an old and new server. Here is my param statement:

Param( 
    [Parameter(Mandatory=$True, ValueFromPipeline=$True, ValueFromPipelineByPropertyName=$True)]
    [string]$Username,

    [switch]$RetainGroups,

    [Parameter(ParameterSetName='TransferHomeDrive', Mandatory=$False)]
    [switch]$TransferHomeDrive,

    [Parameter(ParameterSetName='TransferHomeDrive', Mandatory=$True)]
    [string]$OldServer,

    [Parameter(ParameterSetName='TransferHomeDrive', Mandatory=$True)]
    [string]$NewServer
)

所以，如果它工作正常，你可以运行

So, if it were working, you could run

Move-AccountOut -Username JohnSmith -RetainGroups

它不会安排家庭驱动器转移.但是，如果您要运行

And it won't schedule a home drive transfer. However, if you were to run

Move-AccountOut -Username JohnSmith -RetainGroups -TransferHomeDrive 

它会提示 OldServer 和 NewServer.

我发现了类似的问题，包括这些问题，但仍然无法解决:

I've found similar questions, including these, but it's still not working:

PowerShell 强制参数依赖于其他参数

有一个可选参数需要另一个要存在的参数

我相信如果我创建第二个参数集会起作用，其中包括所有参数，包括 Username 和 RetainGroups，但似乎根据其他帖子我应该能够让它按照我编写的方式工作，其中 Username 和 RetainGroups 是全局"参数，而 OldServer和 NewServer 仅在设置 TransferHomeDrive 时才需要

I believe that it would work if I created a second parameter set, that included ALL parameters, including Username and RetainGroups, but it seems like according to the other posts that I should be able to have it work the way that I have it written, where Username and RetainGroups are "global" parameters, and OldServer and NewServer are only required when TransferHomeDrive is set

推荐答案

在你的代码中你只有一个参数集TransferHomeDrive，你没有其他default参数集.您应该让 PowerShell 知道存在另一个命名参数集，方法是在 CmdletBinding 或 Parameter 属性中显式声明它.

In your code you have only one parameter set TransferHomeDrive, you does not have other default parameter set. You should let PowerShell know, that another named parameter set exists, by explicitly declare it in CmdletBinding or Parameter attribute.

[CmdletBinding(DefaultParameterSetName='NoTransferHomeDrive')]
Param( 
    [Parameter(Mandatory=$True, ValueFromPipeline=$True, ValueFromPipelineByPropertyName=$True)]
    [string]$Username,

    [switch]$RetainGroups,

    [Parameter(ParameterSetName='TransferHomeDrive', Mandatory=$False)]
    [switch]$TransferHomeDrive,

    [Parameter(ParameterSetName='TransferHomeDrive', Mandatory=$True)]
    [string]$OldServer,

    [Parameter(ParameterSetName='TransferHomeDrive', Mandatory=$True)]
    [string]$NewServer
)

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