从脚本中声明时，函数的多个ParameterSets有效，但从模块中导入时，则不起作用

Question

I wrote a 'wrapper' function for the Send-MailMessage function with a hard-coded SmtpServer argument (that's all it does). Here's the header declaring the sets:

function SendMessage {
[CmdletBinding(DefaultParameterSetName='Path')]
Param(
    [Parameter(Mandatory,
               ParameterSetName='Path',
               HelpMessage='the path and filename to the message you would like to send')]
    [String]$Path,

    [Parameter(Mandatory,
               HelpMessage="A string containing the message which you want to send",
               ParameterSetName='Msg')]
    [String]$Msg,

    [Parameter(Mandatory, 
               HelpMessage='Your Admin Office 365 credentials',
               ParameterSetName='Path')]
    [Parameter(Mandatory,
               ParameterSetName='Msg')]
    [Alias('Credentials')]
    [System.Management.Automation.PSCredential]$Cred,

    [Parameter(Mandatory,
               HelpMessage='The address to which you want to send the message',
               ParameterSetName='Path')]
    [Parameter(Mandatory,
               ParameterSetName='Msg')]
    [String[]]$To,

    [Parameter(Mandatory,
               HelpMessage='The email from which you want to send the message',
               ParameterSetName='Path')]
    [Parameter(Mandatory,
               ParameterSetName='Msg')]
    [String]$From,

    [Parameter(Mandatory,
               HelpMessage='The subject of the email to send out',
               ParameterSetName='Path')]
    [Parameter(Mandatory,
               ParameterSetName='Msg')]
    [ValidateNotNullOrEmpty()]
    [String]$Subject,

    [Parameter(ParameterSetName='Path',
               HelpMessage='[Optional] If you want it cc''d to anyone')]
    [Parameter(ParameterSetName='Msg')]
    [String[]]$CC
)
# do function stuff
}

The function has two ParameterSet s: Path and Msg .

When I run it as a .ps1 script, I can see both sets:

PS U:\> test.ps1
PS U:\> gcm SendMessage -Syntax

SendMessage -Path <string> -Cred <pscredential> -To <string[]> -From <string> -Subject <string> [-CC <string[]>] [<CommonParameters>]

SendMessage -Msg <string> -Cred <pscredential> -To <string[]> -From <string> -Subject <string> [-CC <string[]>] [<CommonParameters>]

But when I import it as a module, I can only see the Path set:

PS U:\> Import-Module -Name test.psm1
PS U:\> gcm SendMessage -Syntax

SendMessage [-Cred] <pscredential> [-Path] <string> [-To] <string> [-From] <string> [-Subject] <string> [[-CC] <string[]>] [<CommonParameters>]

PS U:\> 

I would like to be able to import both sets when I import the module.

Is there anything obvious which I am missing? Thank you.

EDIT : I am using PS version 5.1, and have been testing using the ISE.

Answer 1

Testing scripts and function with the ISE makes it so complex. variables and functions in ISE is always available in global scope. Test this in PowerShell console.

Open a new PowerShell console, and dot source test.ps1

. c:\test.ps1
Get-Command SendMessage -Syntax

Open another PowerShell console and run Import-Module

Import-Module c:\Test.ps.1 -Verbose
Get-Command SendMessage -syntax