Question

我遇到使用PowerShell从XML配置文件的XPath获取和设置属性值的问题。属性就像

"<add key="TransactDeadLetterQueueThreshold" value="0" />".

示例XML文件：

    <?xml version="1.0" encoding="utf-8"?>
    <configuration>
      <appSettings>
        <add key="ReportFile" value="C:\Program Files\Fusion\Viewer Suite Monitoring\ViewersMonitoring\monitor.txt" />
    <add key="QueueThreshold" value="1000" />
    <add key="TransactDeadLetterQueueThreshold" value="0" />
    <add key="TimeCardsThreshold" value="6000" />
    <add key="PercentDiskSpaceThreshold" value="10" />
    <add key="QueueCreatedFormat" value="The {0} queue is created." />
    <add key="QueueOverThresholdFormat" value="The {0} queue size is larger than {1} messages." />
    <add key="QueueTransactDeadLetterOverThresholdFormat" value="The transactional dead queue size is larger than {0} messages." />
    <add key="DriveThresholdFormat" value="The {0} drive space is less than {1}." />
    <add key="QueueRemovedFormat" value="The {0} queue is removed." />
    <add key="TimeCardsOverThresholdFormat" value="The time card records count is greater than or equal to {0} ." />
    <add key="FailedConnectDbFormat" value="Failed: unable to access the database, reason: {0}" />
    <add key="LogName" value="Viewer Suite Monitor" />
    <add key="ViewersPrivateQueues" value="private$\adt,private$\infusionviewer,private$\timecards" />
    <add key="DrivetobeMonitored" value="D:" />
  </appSettings>

我试图通过以下方式获取属性：

$xdoc = Get-content "C:\Program Files\Fusion\Viewer Suite Monitoring\CareFusion.Infusion.ViewerSuite.Monitoring.exe.config"


$value = ($xdoc.configuration.appSettings.SelectSingleNode(add[@key = "PercentDiskSpaceThreshold"])) + $value.GetAttribute('key')

也尝试过这种方式：

$xdoc = Get-Content "C:\Program Files\Fusion\Viewer Suite Monitoring\Fusion.ViewerSuite.Monitoring.exe.config"
$value = $xdoc.selectSingleNode("/configuration/appSettings/add[@key = ""TransactDeadLetterQueueThreshold""] ")'+"
$value.GetAttribute('key')"

我收到错误。我不知道这有什么问题。请帮忙。

Answer 1

你走在正确的轨道上。

确保PowerShell将XML视为具有[xml]类型加速器的实际XmlDocument对象：

$XmlPath = '.\path\to\app.config'
$XDoc = [xml](Get-Content $XmlPath)

选择要更改其值的节点：

$TransactDeadLetterNode = $XDoc.SelectSingleNode('//add[@key = "TransactDeadLetterQueueThreshold"]')

设置属性：

$TransactDeadLetterNode.SetAttribute("value",1)

（对要更改的任何其他节点重复）
最后保存文档：

$XDoc.Save($XmlPath)

使用PowerShell从XML的XPath获取属性值

1 个答案: