json - 如何使用变量访问 powershell PSCustomObject 变量(来自 json)

Question

我有一个 PSCustomObject，它有这样的子对象列表:

vmssSystemUpdatesMonitoringEffect                                   : @{type=String; metadata=; allowedValues=System.Object[]; defaultValue=AuditIfNotExists}
vmssEndpointProtectionMonitoringEffect                              : @{type=String; metadata=; allowedValues=System.Object[]; defaultValue=AuditIfNotExists}
vmssOsVulnerabilitiesMonitoringEffect                               : @{type=String; metadata=; allowedValues=System.Object[]; defaultValue=AuditIfNotExists}
systemUpdatesMonitoringEffect                                       : @{type=String; metadata=; allowedValues=System.Object[]; defaultValue=AuditIfNotExists}
systemConfigurationsMonitoringEffect                                : @{type=String; metadata=; allowedValues=System.Object[]; defaultValue=AuditIfNotExists}

等等

对象的一部分作为 JSON:

{
  "vmssSystemUpdatesMonitoringEffect": {
    "type": "String",
    "metadata": {
      "displayName": "System updates on virtual machine scale sets should be installed",
      "description": "Enable or disable virtual machine scale sets reporting of system updates"
    },
    "allowedValues": [
      "AuditIfNotExists",
      "Disabled"
    ],
    "defaultValue": "AuditIfNotExists"
  },
  "vmssEndpointProtectionMonitoringEffect": {
    "type": "String",
    "metadata": {
      "displayName": "Endpoint protection solution should be installed on virtual machine scale sets",
      "description": "Enable or disable virtual machine scale sets endpoint protection monitoring"
    },
    "allowedValues": [
      "AuditIfNotExists",
      "Disabled"
    ],
    "defaultValue": "AuditIfNotExists"
  },
  "vmssOsVulnerabilitiesMonitoringEffect": {
    "type": "String",
    "metadata": {
      "displayName": "Vulnerabilities in security configuration on your virtual machine scale sets should be remediated",
      "description": "Enable or disable virtual machine scale sets OS vulnerabilities monitoring"
    },
    "allowedValues": [
      "AuditIfNotExists",
      "Disabled"
    ],
    "defaultValue": "AuditIfNotExists"
  }
}

我要排列的键

$Keys = $Hash | Get-Member -MemberType NoteProperty | Select-Object -ExpandProperty Name

我可以将键放入数组并迭代它们，但我无法通过给键提供变量来访问属性:

foreach ($key in $Keys) {
        Write-Host "key" $key
        $data = $KeyValue.$key  
}

结果:关键 aadAuthenticationInServiceFabricMonitoringEffect

数据为空

但是，这是可行的:

$KeyValue.vmssSystemUpdatesMonitoringEffect

还有这个:

$key= "aadAuthenticationInServiceFabricMonitoringEffect"
$KeyValue.$key

我怎样才能让它与变量一起工作？

Answer 1

要迭代 PSObject 的属性，您需要使用 $YourObject.psobject.Properties.Name

遍历属性

请参阅下面的示例，该示例基于您提供的信息。

$Policyset = Get-AzPolicySetDefinition
$Policyset = Get-AzPolicySetDefinition -Name 1f3afdf9-d0c9-4c3d-847f-89da613e70a8 
$policyHash = $Policyset.Properties.parameters

$DataSet = $policyHash.aadAuthenticationInServiceFabricMonitoringEffect
$Keys = $DataSet.psobject.Properties.name

foreach ($key in $Keys) {
    Write-Host $Key -ForegroundColor Cyan
    Write-Host $DataSet.$key
}

结果

补充说明由于您添加了要迭代嵌套属性，请查看此处提供的答案。 iterate-over-psobject-properties-in-powershell .请注意由于引用父对象而导致的无限循环，因为这确实适用于您的情况。