无法通过Get-Properties获取XML属性值，求递归提取XML属性至对象方案

需求 #

在PowerShell中处理XML变量时，需要递归提取所有嵌套的System.Xml.XmlElement类型子属性的字符串值，并将所有属性扁平化后赋值到一个对象中。例如：

$xml.object1 # 包含子属性，类型为System.Xml.XmlElement
$xml.object2 # 包含子属性，类型为System.Xml.XmlElement
$xml.object3 # 类型为字符串
$xml.object4 # 类型为字符串

需要提取object1和object2的所有多层嵌套子属性值，比如$xml.object1.object11.object111.object1111这类层级结构的值。

尝试过的方法及问题 #

使用Do/Until循环遇到实现困难后，转而使用Get-Properties，但无法通过其输出获取属性值，尝试了多种写法均无效：

get-properties -object $xml -pathname object1 | select -first 1 | foreach-object {
#attempt1
$p = $xml.$_
$p

#attempt2
$string = $_ | out-string
$xml.$string

}

get-properties -object $xml | select -first 1 | foreach-object {

#attempt3
$split = $_ -split ('$_.') | select -last 1 | out-string
$xml.$split

#attempt4
[string]$string = $_
$split = $string -split ('$_.') | select -last 1
$xml.$split

#attempt5
$string = $_ | out-string
$split = $string -split ('$_.') | select -last 1
$xml.$split
}

由于对象基类型为System.Object，无法确定如何转换为字符串以获取属性值。

处理的XML示例片段（gpresult生成） #

<OneX xmlns="http://www.microsoft.com/networking/OneX/v1">
              <cacheUserData>true</cacheUserData>
              <heldPeriod>1</heldPeriod>
              <authPeriod>18</authPeriod>
              <startPeriod>5</startPeriod>
              <maxStart>3</maxStart>
              <maxAuthFailures>1</maxAuthFailures>
              <authMode>machineOrUser</authMode>
              <singleSignOn>
                <type>postLogon</type>
                <maxDelay>10</maxDelay>
                <allowAdditionalDialogs>false</allowAdditionalDialogs>
                <userBasedVirtualLan>false</userBasedVirtualLan>
              </singleSignOn>
              <EAPConfig>
                <EapHostConfig xmlns="http://www.microsoft.com/provisioning/EapHostConfig">
                  <EapMethod>
                    <Type xmlns="http://www.microsoft.com/provisioning/EapCommon">25</Type>
                    <VendorId xmlns="http://www.microsoft.com/provisioning/EapCommon">0</VendorId>
                    <VendorType xmlns="http://www.microsoft.com/provisioning/EapCommon">0</VendorType>
                    <AuthorId xmlns="http://www.microsoft.com/provisioning/EapCommon">0</AuthorId>
                  </EapMethod>
                  <Config xmlns="http://www.microsoft.com/provisioning/EapHostConfig">
                    <Eap xmlns="http://www.microsoft.com/provisioning/BaseEapConnectionPropertiesV1">
                      <Type>25</Type>
                      <EapType xmlns="http://www.microsoft.com/provisioning/MsPeapConnectionPropertiesV1">
                        <ServerValidation>
                          <DisableUserPromptForServerValidation>false</DisableUserPromptForServerValidation>
                          <ServerNames>
                          </ServerNames>
                        </ServerValidation>
                        <FastReconnect>true</FastReconnect>
                        <InnerEapOptional>false</InnerEapOptional>
                        <Eap xmlns="http://www.microsoft.com/provisioning/BaseEapConnectionPropertiesV1">
                          <Type>26</Type>
                          <EapType xmlns="http://www.microsoft.com/provisioning/MsChapV2ConnectionPropertiesV1">
                            <UseWinLogonCredentials>true</UseWinLogonCredentials>
                          </EapType>
                        </Eap>
                        <EnableQuarantineChecks>false</EnableQuarantineChecks>
                        <RequireCryptoBinding>false</RequireCryptoBinding>
                        <PeapExtensions>
                          <PerformServerValidation xmlns="http://www.microsoft.com/provisioning/MsPeapConnectionPropertiesV2">true</PerformServerValidation>
                          <AcceptServerName xmlns="http://www.microsoft.com/provisioning/MsPeapConnectionPropertiesV2">false</AcceptServerName>
                        </PeapExtensions>
                      </EapType>
                    </Eap>
                  </Config>
                </EapHostConfig>
              </EAPConfig>
            </OneX>

明确需求细节 #

• 将所有属性及子属性扁平化处理（无嵌套结构）
• 过滤掉xmlns命名空间链接
• 若属性名为type，使用“父节点名称 Type”作为属性名

解决方案 #

参考TheMadTechnician的脚本修改后，实现代码如下：

select-xml -xml $onex -XPath '//*'|?{$_.node.'#text'}|%{
    $ThisNode = $_.Node
    $PathArr = do{
        $ThisNode.Name
        $ThisNode = $ThisNode.psbase.parentnode
    }until(!$ThisNode.psbase.parentnode)
    [array]::Reverse($PathArr)
    $PathString = $PathArr -join '.'
    if ($pathstring -like "*.OneX*")
    {
        $selectlast1 = $pathstring -split ('OneX.') | select -Last 1
        if ($selectlast1 -like "*type")
        {
            [string]$n = ($selectlast1.split('.') | select -Last 2) -join (' ')
        }
        else
        {
            [string]$n = $selectlast1.split('.') | select -Last 1
        }
        
        [string]$v = $_.node.'#Text'
        $onexobj | Add-Member -MemberType NoteProperty -Name $n -Value $v 
        
    }
} 

内容的提问来源于stack exchange，提问作者takeitback86