powershell - Powershell启 Action 业脚本 block 中的Powershell V3变量未扩展

Question

我在Powershell脚本中遇到问题。我正在尝试使用start-job对一台计算机列表运行一堆测试连接。

我已经将脚本修剪成基本的样子了，

$cnamesAll=@("localhost","dc01","ex01","dd01")
$cnamesAll | ForEach-Object { start-job { Test-Connection $args[0]}  -ArgumentList "$_"}
Get-Job | % { $_.Command }
Get-Job | Wait-Job 
Remove-Job * 

这是我在运行时得到的输出:

Id     Name            PSJobTypeName   State         HasMoreData     Location             Command                  
--     ----            -------------   -----         -----------     --------             -------                  
2916   Job2916         BackgroundJob   Running       True            localhost             Test-Connection $args[0]
2918   Job2918         BackgroundJob   Running       True            localhost             Test-Connection $args[0]
2920   Job2920         BackgroundJob   Running       True            localhost             Test-Connection $args[0]
2922   Job2922         BackgroundJob   Running       True            localhost             Test-Connection $args[0]
 Test-Connection $args[0]
 Test-Connection $args[0]
 Test-Connection $args[0]
 Test-Connection $args[0]
2916   Job2916         BackgroundJob   Completed     True            localhost             Test-Connection $args[0]
2918   Job2918         BackgroundJob   Completed     True            localhost             Test-Connection $args[0]
2920   Job2920         BackgroundJob   Completed     True            localhost             Test-Connection $args[0]
2922   Job2922         BackgroundJob   Completed     True            localhost             Test-Connection $args[0]

如您所见，start-job脚本块中的$ args [0]没有扩展。

我在Server 2012上运行此程序并输出$ PSVersionTable

S C:\Users\administrator\Documents> $PSVersionTable

Name                           Value                                                                                        
----                           -----                                                                                        
PSVersion                      3.0                                                                                          
WSManStackVersion              3.0                                                                                          
SerializationVersion           1.1.0.1                                                                                      
CLRVersion                     4.0.30319.18408                                                                              
BuildVersion                   6.2.9200.16628                                                                               
PSCompatibleVersions           {1.0, 2.0, 3.0}                                                                              
PSRemotingProtocolVersion      2.2 

有人可以帮我搜索一个多小时吗？谢谢。

Answer 1

Get-Job | % { $_.Command }显示您在作业中运行的命令。脚本块中的命令是Test-Connection $args[0]，这就是Command属性返回的内容。参数可以很好地传递到作业中，如果您从作业中检索了输出，则会看到该参数:

Get-Job | Wait-Job | Receive-Job

示范:

PS C:\> 'localhost' | % {Start-Job {Test-Connection $args[0]} -ArgumentList $_}

Id  Name   PSJobTypeName  State   HasMoreData  Location  Command
--  ----   -------------  -----   -----------  --------  -------
30  Job30  BackgroundJob  Running True         localhost Test-Connection $args...


PS C:\> Get-Job | % { $_.Command }
 Test-Connection $args[0]
PS C:\> Get-Job | Wait-Job | Receive-Job

Source  Destination  IPV4Address  IPV6Address  Bytes  Time(ms)
------  -----------  -----------  -----------  -----  --------
VM01    localhost    127.0.0.1    ::1          32     0
VM01    localhost    127.0.0.1    ::1          32     0
VM01    localhost    127.0.0.1    ::1          32     0
VM01    localhost    127.0.0.1    ::1          32     0


PS C:\> Remove-Job *