使用Powershell添加和删除Xmlnode

Question

我试图添加和删除多个xml文件中的元素。我遇到了两个问题。它自动删除空元素，然后它没有删除我想要的东西

我有这样的xml

<Entity>
   <App>
      <item1>1</item1>
      <emptyItem/>
      <person>
         <itemToRemove>true</itemToRemove>
         <emptyItem/>
         <otheritem>1</otheritem>
      </person>
      <person>
         <itemToRemove>false</itemToRemove>
         <emptyItem/>
         <otheritem>3</otheritem>
      </person>
      <person>
         <itemToRemove>false</itemToRemove>
         <emptyItem/>
         <otheritem>3</otheritem>
      </person>
   </App>
</Entity>

我想要的是什么

<Entity>
   <App>
      <item1>1</item1>
      <emptyItem/>
      <person>

         <emptyItem/>
         <otheritem>1</otheritem>
      </person>
      <person>

         <emptyItem/>
         <otheritem>3</otheritem>
      </person>
      <person>

         <emptyItem/>
         <otheritem>3</otheritem>
      </person>
      <newItemtoAdd>2001-01-01</newItemtoAdd>
   </App>
</Entity>

我在上面的输出xml上添加了newItemtoAdd元素并删除了itemToRemove。

with the current script i have used what i get is this

<Entity>
   <App>
      <item1>1</item1>
      <emptyItem/>
      <person>
         <itemToRemove>true</itemToRemove>
         <otheritem>1</otheritem>
      </person>
      <person>
         <itemToRemove>false</itemToRemove>
         <otheritem>3</otheritem>
      </person>
      <person>
         <itemToRemove>false</itemToRemove>
         <otheritem>3</otheritem>
      </person>
      <newItemtoAdd>2001-01-01</newItemtoAdd>
   </App>
</Entity>

删除了我不希望发生的emptyItem节点，添加了newItemtoAdd这是好的，并且没有删除itemToRemove节点，这不是我想要的

这是我的剧本

Get-ChildItem D:\Projects\*.xml | 
    % { 
        [xml]$xml      = [xml](Get-Content $_.fullname)
        $newItemtoAdd = $xml.CreateElement('newItemtoAdd')
        $newItemtoAdd.PsBase.InnerText = '1900-01-01'
        $null     = $xml.Entity.App.AppendChild($newItemtoAdd)

    $xml.SelectNodes("//Entity/App/person") | ? {
    $_.name -eq "itemToRemove"   } | % {$_.ParentNode.RemoveChildNode($_) }
       $xml.Save($_.FullName)
    }

Answer 1

Get-ChildItem D:\Projects\*.xml | % {
    [Xml]$xml = Get-Content $_.FullName

    $newItemtoAdd = $xml.CreateElement('newItemtoAdd')
    $newItemtoAdd.PsBase.InnerText = '1900-01-01'
    $xml.Entity.App.AppendChild($newItemtoAdd) | Out-Null

    $parent_xpath = '/Entity/App/person'
    $nodes = $xml.SelectNodes($parent_xpath)
    $nodes | % {
        $child_node = $_.SelectSingleNode('itemToRemove')
        $_.RemoveChild($child_node) | Out-Null
    }

    $xml.OuterXml | Out-File $_.FullName
}

Answer 2

要从目录中的所有xml文件中删除节点，并将结果保存为新的xml文件，我使用此powershell-script：

Get-ChildItem .\*.xml | % {
    [Xml]$xml = Get-Content $_.FullName
    $xml | Select-Xml -XPath '//*[local-name() = ''itemToRemove'']' | ForEach-Object{$_.Node.ParentNode.RemoveChild($_.Node)}
    $xml.OuterXml | Out-File .\result.xml -encoding "UTF8"
} 

注意：“local-name”-syntax用于忽略名称空间。