如何在PowerShell工作流中运行Invoke-Command？
要在PowerShell工作流中运行Invoke-Command，我们需要使用InlineScript块，因为工作流中不直接支持Invoke-Command。下面的示例在不使用InlineScript块的情况下出现错误。
示例
Workflow TestInvokeCommand{
Invoke-Command -ComputerName LabMachine2k16 -ScriptBlock{
Get-Service WINRM
}
}输出-
At line:2 char:5
+ Invoke-Command -ComputerName LabMachine2k16 -ScriptBlock{
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cannot call the 'Invoke-Command' command. Other commands from this module have been packaged as workflow activities, but this
command was specifically excluded. This is likely because the command requires an interactive Windows PowerShell session, or has
behavior not suited for workflows. To run this command anyway, place it within an inline-script (InlineScript { Invoke-Command })
where it will be invoked in isolation.
+ CategoryInfo : ParserError: (:) [], ParseException
+ FullyQualifiedErrorId : CommandActivityExcluded上面的错误表明Invoke-Command不能直接与PowerShell一起使用，我们需要在InlineScript块内使用它，如下所示。
Workflow TestInvokeCommand{
InlineScript{
Invoke-Command -ComputerName LabMachine2k16 -ScriptBlock{
Get-Service WINRM
}
}
}
TestInvokeCommand要在InlineScript块内的scriptblock中使用外部变量，我们需要使用$Using：VariableName。例如，
示例
Workflow TestInvokeCommand{
$server = "Labmachine2k16"
InlineScript{
Invoke-Command -ComputerName $using:Server -ScriptBlock{
Get-Service WINRM
}
}
}
TestInvokeCommand要存储输出变量，
输出结果
Workflow TestInvokeCommand{
$server = "Labmachine2k16"
$Status = InlineScript{
Invoke-Command -ComputerName $using:Server -ScriptBlock{
return( Get-Service WINRM).Status
}
}
Write-Output "WinRM Status: $status"
}
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