Powershell环境变量

Question

我尝试在PowerShell中使用环境变量，但我找到的示例似乎不起作用。这是我用来测试的脚本：

Get-ChildItem Env:
Write-Host "************" 
$AlarmDatastore = Get-ChildItem Env:*VMWARE_ALARM_TARGET_NAME*
Write-Host "Var = " $AlarmDatastore.value
$Test = $env:VMWARE_ALARM_TARGET_NAME
Write-Host "Test = " $Test

脚本的输出：

USERNAME                       ADMIN.GABRI
USERPROFILE                    C:\Users\admin.gabri
VMWARE_ALARM_ALARMVALUE        Current values for metric/state
VMWARE_ALARM_DECLARINGSUMMARY  ([Yellow metric Is above 10; Red metric Is a...
VMWARE_ALARM_EVENTDESCRIPTION  Alarm 'Alarm 10 percent test with script' on ...
VMWARE_ALARM_ID                alarm-601
VMWARE_ALARM_NAME              Alarm 10 percent test with script
VMWARE_ALARM_NEWSTATUS         Red
VMWARE_ALARM_OLDSTATUS         Gray
VMWARE_ALARM_TARGET_ID         datastore-12587
VMWARE_ALARM_TARGET_NAME       VCD-VMFS-095-FAST-VNX-5400-04
VMWARE_ALARM_TRIGGERINGSUMM... Metric Disk Space actually used = 96
windir                         C:\Windows
************
Var =  VCD-VMFS-095-FAST-VNX-5400-04
Test =

为什么我只能使用: Get-ChildItem Env:*VMWARE_ALARM_TARGET_NAME*，而不是简单地通过$Test = $env:VMWARE_ALARM_TARGET_NAME来获取环境变量

Answer 1

下面是一些可以尝试的东西：

#Use ${ } for complex variable names
${env:VMWARE_ALARM_TARGET_NAME} 

#Or as part of a print statement use env directly (with or without ${env:}):
Write-Host "Test = $($env:VMWARE_ALARM_TARGET_NAME)" 

#At an interactive prompt see if it can be tab completed
$env:VMWWARE  #then tab to see if it shows up in auto complete

此外，当您运行set时，查看cmd.exe显示的内容也是值得的。在Powershell类型中：

cmd
set
exit

看看输出是什么样子。

Answer 2

由于时间压力，我现在不得不这样做：

$AlarmTARGET_NAME = get-childitem Env:*VMWARE_ALARM_TARGET_NAME*
$AlarmNAME = get-childitem Env:*VMWARE_ALARM_NAME*
$AlarmEVENTDESCRIPTION = get-childitem Env:*VMWARE_ALARM_EVENTDESCRIPTION*
$AlarmDECLARINGSUMMARY = get-childitem Env:*VMWARE_ALARM_DECLARINGSUMMARY*
$AlarmVALUE = get-childitem Env:*VMWARE_ALARM_ALARMVALUE*

不是很干净的代码，但它可以工作。谢谢你所有的回复。

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