Question

我的任务是连接到其他VM并执行某些任务，.....并传递任务参数。我为此使用Invoke-Expression，..... 现在，当我直接在invoke-expression中传递静态路径时，效果很好，但是当我将其分配给varible并追加到invoke-expression时。它不起作用

我尝试通过提供静态路径来正常工作并在远程vm上执行批处理，问题是路径是动态的

  Static is working fine has shown below:

  $server="slc10XXX.XX.XXXX.com"
  $username="XXXXXXX"
  $password="XXXXXX@321"
  $pass = ConvertTo-SecureString -AsPlainText $password -Force
  $cred = New-Object System.Management.Automation.PSCredential - 
  ArgumentList $username, $pass
  $path="cmd.exe /c C:\Task6-MASSUOW\chay.bat"
  Invoke-Command -ComputerName $server -credential $cred -ErrorAction Stop 
  -ScriptBlock {Invoke-Expression -Command:"cmd.exe /c C:\Task6- 
  MASSUOW\chay.bat"}

  Getting issue in below code when i assign $path:

  $server="slc10XXX.XX.XXXX.com"
  $username="XXXXXXX"
  $password="XXXXXX@321"
  $pass = ConvertTo-SecureString -AsPlainText $password -Force
  $cred = New-Object System.Management.Automation.PSCredential - 
  ArgumentList $username, $pass
  $path="cmd.exe /c C:\Task6-MASSUOW\chay.bat"
  Invoke-Command -ComputerName $server -credential $cred -ErrorAction Stop 
  -ScriptBlock {Invoke-Expression -Command:"$path"}

PowerShell.exe：无法将参数绑定到参数“ Command”，因为它为空。在第1行：char：1 + PowerShell.exe -ExecutionPolicy绕过-File'C：\ Users \ chaj \ Documents ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~ + CategoryInfo：未指定：（无法绑定arg ...，因为它为null。：String）[]，RemoteException + FullyQualifiedErrorId：NativeCommandError在C：\ Users \ chaj \ Documents \ String \ Chat1.ps1：8 char：1 +调用命令-ComputerName $ server -credential $ cred -ErrorAction S ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~ + CategoryInfo：InvalidData：（:) [Invoke-Expression]，ParameterBindingValidationException + FullyQualifiedErrorId：ParameterArgumentValidationErrorNullNotAllowed，Microsoft.PowerShell.Commands.InvokeExpre ssionCommand + PSComputerName：slc10XXXX.XX.XXXX.com

Answer 1

这是因为"$path"是作为字符串文字发送到远程服务器的。该表达式将在此处求值，但是远程会话中未定义$path。这就是为什么它为空。

例如，您可以这样做：

Invoke-Command -ComputerName $server -Credential $cred -ErrorAction Stop -ScriptBlock {
   param($path)
   Invoke-Expression -Command:$path
} -ArgumentList "cmd.exe /c C:\Task6-MASSUOW\chay.bat"

或更简单：

Invoke-Command -Script { & $Args[0] } -Arg "C:\Task6-MASSUOW\chay.bat" -Computer $server -Cred $cred -EA Stop

在分配的动态变量不起作用时调用表达式

1 个答案: