xml - 如何使用insertAfter()在XML中的特定元素之后插入元素

Question

我的文件.xml看起来像这样

<?xml version="1.0" encoding="UTF-8"?>
<layoutMaster xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="..\schema\m.xsd">
  <deviceFamily>
    <deviceFamilyUniqueID>DeviceFamilyWayside_2</deviceFamilyUniqueID>
    <name>DeviceFamilyWayside_2</name>
    <device>SAMSUNG</device>
    <device>SONY</device>
    <deviceFamilyOptions>
      <name>false</name>
    </deviceFamilyOptions>
  </deviceFamily>
  <deviceFamily>
    <deviceFamilyUniqueID>DeviceFamilyWayside_4</deviceFamilyUniqueID>
    <name>DeviceFamilyWayside_4</name>
    <device>IPHONE</device>
    <device>MAC</device>
    <deviceFamilyOptions>
      <name>false</name>
    </deviceFamilyOptions>
  </deviceFamily>
</layoutMaster>

我想在最后一个设备之后的deviceFamily[deviceFamilyUniqueID ='DeviceFamilyWayside_2']中添加一个新设备:

因此，我在PowerShell中尝试了以下代码:

$Path = ".\config.xml"
[xml]$xmlFile = Get-Content -Path $Path

$xmlNewElementDevice = $xmlFile.CreateElement("device")
$xmlNewElementDevice.AppendChild($xmlFile.CreateTextNode("ALCATEL"))

$xmlTargetDeviceWayside = $xmlFile.SelectSingleNode('//layoutMaster/deviceFamily[deviceFamilyUniqueID = "DeviceFamilyWayside_2"]')
$xmlTargetDeviceWayside.InsertAfter($xmlNewElementDevice,$xmlTargetDeviceWayside.name)

但是我得到了这个错误:

Unable to convert the argument "1" (value "DeviceFamilyWayside_2") from "InsertAfter" to type "System.Xml.XmlNode":" Unable to convert "DeviceFamilyWayside_2" value from "System.String" to type "System.Xml.XmlNode". "

我想要得到的最终结果是这样的:

<?xml version="1.0" encoding="UTF-8"?>
<layoutMaster xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="..\schema\m.xsd">
  <deviceFamily>
    <deviceFamilyUniqueID>DeviceFamilyWayside_2</deviceFamilyUniqueID>
    <name>DeviceFamilyWayside_2</name>
    <device>SAMSUNG</device>
  <device>SONY</device>
    <device>ALCATEL</device>    <--------------- here
    <deviceFamilyOptions>
      <name>false</name>
    </deviceFamilyOptions>
  </deviceFamily>
  <deviceFamily>
    <deviceFamilyUniqueID>DeviceFamilyWayside_4</deviceFamilyUniqueID>
    <name>DeviceFamilyWayside_4</name>
    <device>IPHONE</device>
  <device>MAC</device>
    <deviceFamilyOptions>
      <name>false</name>
    </deviceFamilyOptions>
  </deviceFamily>
</layoutMaster>

Answer 1

在节点<deviceFamilyOptions>之前插入新节点:

[xml]$xml = Get-Content -Path $Path

$newNode = $xml.CreateElement("device")
$newNode.InnerText = 'ALCATEL'

$parent = $xml.SelectSingleNode('//layoutMaster/deviceFamily[deviceFamilyUniqueID="DeviceFamilyWayside_2"]')
$ref    = $parent.SelectSingleNode('./deviceFamilyOptions')

$parent.InsertBefore($newNode, $ref) | Out-Null

或者，选择最后一个<device>节点作为引用节点，之后再插入新节点:

$parent = $xml.SelectSingleNode('//layoutMaster/deviceFamily[deviceFamilyUniqueID="DeviceFamilyWayside_2"]')
$ref    = $parent.SelectSingleNode('./device[last()]')

$parent.InsertAfter($newNode, $ref) | Out-Null