PowerShell远程服务状态刷新报错，如何更新远程服务状态变量？

Hey there! Let's break down why you're hitting that error and fix it up.

问题根源 #

When you use Invoke-Command to fetch a service object from a remote machine, PowerShell serializes and deserializes the object for transmission. The result you get back is a Deserialized.System.ServiceProcess.ServiceController object—not the live ServiceController instance you'd get locally. This deserialized copy only holds the object's property data, not its original methods like Refresh()—hence the "method not found" error.

解决方案 #

Instead of trying to call Refresh() on the stale deserialized object, you need to re-query the remote machine to get the latest service state. Here's your revised script with this fix, plus a few small improvements for maintainability:

$cred = Import-Clixml -Path F:\Powershell\Safe\xxxx.txt
$servicename = "Telephony" # Make sure this matches your actual service name
$targetServer = "xxxx" # Centralize server name for easier updates

# Initial service status check
$serviceStatus = Invoke-Command -ComputerName $targetServer -ArgumentList $servicename -ScriptBlock { 
    Param($servicename) 
    Get-Service -Name $servicename 
} -Credential $cred

if ($serviceStatus.Status -eq "Running"){
    Write-Host "The Telephony service is started on $targetServer"
} else {
    Write-Host "The Telephony service is stopped on $targetServer, starting up service"
    Start-Sleep -Seconds 5
    
    # Start the remote service
    Invoke-Command -ComputerName $targetServer -ArgumentList $servicename -ScriptBlock { 
        Param($servicename) 
        Start-Service -Name $servicename 
    } -Credential $cred
    
    Write-Host "Telephony service is starting on $targetServer"
    Start-Sleep -Seconds 10
    
    # Re-query for updated status (replaces the broken Refresh() call)
    $serviceStatus = Invoke-Command -ComputerName $targetServer -ArgumentList $servicename -ScriptBlock { 
        Param($servicename) 
        Get-Service -Name $servicename 
    } -Credential $cred
    
    if ($serviceStatus.Status -eq "Running") {
        Write-Host "Telephony service is now started on $targetServer"
    } else {
        Write-Host "The Telephony service failed to start on $targetServer please check services and try again."
    }
}

Key Fixes & Improvements #

• Replaced $server1.Refresh() with a fresh Invoke-Command call to pull the latest service state from the remote machine.
• Added $targetServer and explicitly defined $servicename to make the script easier to update and debug.
• Fixed the missing closing curly brace at the end of your original script to avoid syntax errors.

内容的提问来源于stack exchange，提问作者KN619