Question

我正在尝试使用此Powershell脚本停止远程服务：

$hostname1 = "myhost"
$serviceName = "myservice"
Write-Host "Hostname: $hostname1"
Write-Host "Service name: $serviceName"
Invoke-Command -ComputerName $hostname1 -ScriptBlock {
  Stop-Service -Name $serviceName -Force
}

但收到此错误消息：

Cannot bind argument to parameter 'Name' because it is null.
    + CategoryInfo          : InvalidData: (:) [Stop-Service], ParameterBindin
   gValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,M icrosoft.PowerShell.Commands.StopServiceCommand

如果我从脚本中删除Invoke-Command，我可以看到变量已正确初始化：

$hostname1 = "myhost"
$serviceName = "myservice"
Write-Host "Hostname: $hostname1"
Write-Host "Service name: $serviceName"

返回：

Hostname: myhost
Service name: myservice

这可能是什么原因？

谢谢，罗马

Answer 1

进一步挖掘，我自己找到了答案 - 需要使用-argumentlist

$hostname1 = "myhost"
$serviceName = "myservice"
Write-Host "Hostname: $hostname1"
Write-Host "Service name: $serviceName"
Invoke-Command -ComputerName $hostname1 -ScriptBlock {
  Stop-Service -Name $args[0] -Force
} -argumentlist $serviceName

Answer 2

另一种解决方案
，请使用自动变量'$ using'。

$hostname1 = "myhost"
$serviceName = "myservice"
Write-Host "Hostname: $hostname1"
Write-Host "Service name: $serviceName"
Invoke-Command -ComputerName $hostname1 -ScriptBlock {
  Stop-Service -Name $Using:ServiceName -Force
}

Powershell - 无法将参数绑定到参数“Name”，因为它为null

2 个答案: