Question

感谢您查看我的问题。

我正在使用powershell尝试解析xml文件并只获取我感兴趣的信息。在网上查看了一些教程和示例，我将下面的命令放在一起，但它根本没有返回任何结果，可能是因为我没有正确定位信息。我只能在$ xml.EnergyReport.Troubleshooter中从文件中获取信息，但是比这更深的东西不会返回任何结果，例如$ xml.EnergyReport.Troubleshooter.AnalysisLog.LogEntry

这是我第一次尝试解析XML文件。我正在尝试自动获取笔记本电池的电池寿命信息，以避免滚动浏览大量的html / xml文档。

我从网上拼凑的命令是：

$Path = "c:\Users\Public\Desktop\powerreport.xml"
$xml = New-Object -TypeName XML
$xml.Load($Path)
$item = Select-XML -Xml $xml -Xpath '//Troubleshooter[Name="Battery"]'
$item.AnalysisLog.LogEntry.Details.Detail | Select-Object -Property Name, Value

我希望输出看起来像这样：

电池ID 11111COMPANY111111
由COMPANY
序列号11111
类型蝙蝠
电池设计容量62160
上次完全充电36330

FYI输出来自命令

powercfg -energy -xml -output %public%\Desktop\powerreport.xml

我想从名为Battery的“故障排除”元素下获取信息。

以下是我本地计算机上编辑的xml文件示例：

<?xml version="1.0" encoding="utf-8"?>
 <EnergyReport xmlns="http://schemas.microsoft.com/energy/2007">
  <ReportInformation>
    <ReportGuid>dd3587c9-fe63-4e99-9695-2347b85477c0</ReportGuid>
    <ReportVersion>1.0</ReportVersion>
    <ScanTime>2014-03-14T06:42:19Z</ScanTime>
    <ScanDuration>PT60S</ScanDuration>
  </ReportInformation>
  <Troubleshooter guid="5f159d5d-4dec-4caf-81e5-645d77e05c84">
    <Name>Battery</Name>
    <AnalysisLog>
      <LogEntry guid="76e4b077-bb50-4000-9563-7f5aa0c9dc26">
        <Name>Battery Information</Name>
        <Severity>Informational</Severity>
        <Description></Description>
        <Details>
          <Detail guid="118bf18a-13d4-4226-b207-f2ae1638de8b">
            <Name>Battery ID</Name>
            <Value>11111COMPANY111111</Value>
          </Detail>
          <Detail guid="85b01a9b-bb18-4f71-8d12-6f7dec4b3705">
            <Name>Created by</Name>
            <Value>COMPANY</Value>
          </Detail>
          <Detail guid="2229029f-aa9e-4591-989a-32223a114538">
            <Name>Serial Number</Name>
            <Value>11111</Value>
          </Detail>
          <Detail guid="24e6973f-f544-4a33-876d-359ebc56336e">
        <Name>Type</Name>
            <Value>BAT</Value>
          </Detail>
          <Detail guid="beb3f51a-9d89-42ad-81c4-5f9b7f682fa4">
            <Name>Battery design capacity</Name>
            <Value>62160</Value>
          </Detail>
          <Detail guid="b42aa79e-8ee8-44ae-8a11-5fe87cf2822b">
            <Name>Last full charge</Name>
            <Value>36330</Value>
          </Detail>
        </Details>
      </LogEntry>
    </AnalysisLog>
  </Troubleshooter>
</EnergyReport>

Answer 1

尝试使用以下脚本，该脚本使用PowerShell“here string”在线声明XML。

$Xml = @"
<?xml version="1.0" encoding="utf-8"?>
 <EnergyReport xmlns="http://schemas.microsoft.com/energy/2007">
  <ReportInformation>
    <ReportGuid>dd3587c9-fe63-4e99-9695-2347b85477c0</ReportGuid>
    <ReportVersion>1.0</ReportVersion>
    <ScanTime>2014-03-14T06:42:19Z</ScanTime>
    <ScanDuration>PT60S</ScanDuration>
  </ReportInformation>
  <Troubleshooter guid="5f159d5d-4dec-4caf-81e5-645d77e05c84">
    <Name>Battery</Name>
    <AnalysisLog>
      <LogEntry guid="76e4b077-bb50-4000-9563-7f5aa0c9dc26">
        <Name>Battery Information</Name>
        <Severity>Informational</Severity>
        <Description></Description>
        <Details>
          <Detail guid="118bf18a-13d4-4226-b207-f2ae1638de8b">
            <Name>Battery ID</Name>
            <Value>11111COMPANY111111</Value>
          </Detail>
          <Detail guid="85b01a9b-bb18-4f71-8d12-6f7dec4b3705">
            <Name>Created by</Name>
            <Value>COMPANY</Value>
          </Detail>
          <Detail guid="2229029f-aa9e-4591-989a-32223a114538">
            <Name>Serial Number</Name>
            <Value>11111</Value>
          </Detail>
          <Detail guid="24e6973f-f544-4a33-876d-359ebc56336e">
        <Name>Type</Name>
            <Value>BAT</Value>
          </Detail>
          <Detail guid="beb3f51a-9d89-42ad-81c4-5f9b7f682fa4">
            <Name>Battery design capacity</Name>
            <Value>62160</Value>
          </Detail>
          <Detail guid="b42aa79e-8ee8-44ae-8a11-5fe87cf2822b">
            <Name>Last full charge</Name>
            <Value>36330</Value>
          </Detail>
        </Details>
      </LogEntry>
    </AnalysisLog>
  </Troubleshooter>
</EnergyReport>
"@

$Document = Select-Xml -Xml ([xml]$Xml) -XPath /;

$Details = $Document.Node.EnergyReport.Troubleshooter.AnalysisLog.LogEntry.Details.Detail;

foreach ($Detail in $Details) {
    'Name: {0} Value: {1}' -f $Detail.Name, $Detail.Value;
}

此脚本的输出如下所示：

Name: Battery ID Value: 11111COMPANY111111
Name: Created by Value: COMPANY
Name: Serial Number Value: 11111
Name: Type Value: BAT
Name: Battery design capacity Value: 62160
Name: Last full charge Value: 36330

脚本的重要部分是深入研究XML节点。你必须一步一步地做，以确保你不会错过重要的事情。

$Document = Select-Xml -Xml ([xml]$Xml) -XPath /;

$Details = $Document.Node.EnergyReport.Troubleshooter.AnalysisLog.LogEntry.Details.Detail;

foreach ($Detail in $Details) {
    'Name: {0} Value: {1}' -f $Detail.Name, $Detail.Value;
}

无法从XML文档中的两个以上级别获得结果

1 个答案: