Question

我有以下XML文件：

<?xml version="1.0" encoding="utf-8"?>
<!--This is my First XML File-->
<FileHeader>
  <Item>
    <AddendA Test="1"/>
    <MICRDS Type="Regression"/>
    <ImageViewDetail>
      <ImageViewData Selected="Yes"/>
      <ImageDS ArrivalDate="04022018"/>
      <ImageViewAnalysis Status="Pending"/>
    </ImageViewDetail>
    <ImageViewDetail>
      <ImageViewData Selected="Yes"/>
      <ImageDS ArrivalDate="05022018"/>
      <ImageViewAnalysis Status="Complete"/>
    </ImageViewDetail>
    <ImageViewDetail>
      <ImageViewData Selected="No"/>
      <ImageDS ArrivalDate="05022018"/>
      <ImageViewAnalysis Status="In-Progress"/>
    </ImageViewDetail>
  </Item>
</FileHeader>

对于上述XML，我编写了以下PowerShell脚本：

$XML_Path = "D:\TEST_FOLDER\XML_FILES\Sample.xml"
# Create the XML File Tags
$Encoding = New-Object System.Text.UTF8Encoding($false)
$xmlWriter = New-Object System.XMl.XmlTextWriter($XML_Path, $Encoding)
$xmlWriter.Formatting = 'Indented'
$xmlWriter.Indentation = 1
$XmlWriter.IndentChar = "`t"
$xmlWriter.WriteStartDocument()
$xmlWriter.WriteComment('This is my First XML File')
$xmlWriter.WriteStartElement('FileHeader')
$xmlWriter.WriteEndElement()
$xmlWriter.WriteEndDocument()
$xmlWriter.Flush()
$xmlWriter.Close()

# Create the Initial  Node
$CollectionNode = $xmlDoc.CreateElement("Item")
$xmlDoc.SelectSingleNode("//FileHeader").AppendChild($CollectionNode)
$CollectionNode = $xmlDoc.CreateElement("AddendA")
$xmlDoc.SelectSingleNode("//FileHeader//Item").AppendChild($CollectionNode)
$CollectionNode.SetAttribute("Test","1")

$CollectionNode = $xmlDoc.CreateElement("MICRDS")
$xmlDoc.SelectSingleNode("//FileHeader//Item").AppendChild($CollectionNode)
$CollectionNode.SetAttribute("Type","Regression")

$CollectionNode = $xmlDoc.CreateElement("ImageViewDetail")
$xmlDoc.SelectSingleNode("//FileHeader//Item").AppendChild($CollectionNode)

$CollectionNode = $xmlDoc.CreateElement("ImageViewData")
$xmlDoc.SelectSingleNode("//FileHeader//Item//ImageViewDetail").AppendChild($CollectionNode)
$CollectionNode.SetAttribute("Selected","Yes")

$CollectionNode = $xmlDoc.CreateElement("ImageDS")
$xmlDoc.SelectSingleNode("//FileHeader//Item//ImageViewDetail").AppendChild($CollectionNode)
$CollectionNode.SetAttribute("ArrivalDate","04022018")

$CollectionNode = $xmlDoc.CreateElement("ImageViewAnalysis")
$xmlDoc.SelectSingleNode("//FileHeader//Item//ImageViewDetail").AppendChild($CollectionNode)
$CollectionNode.SetAttribute("Status","Pending")
$xmlDoc.Save($XML_Path)

所以我将以下代码段添加到我的代码中

$CollectionNode = $xmlDoc.CreateElement("ImageViewDetail")
$xmlDoc.SelectSingleNode("//FileHeader//Item").AppendChild($CollectionNode)
$CollectionNode = $xmlDoc.CreateElement("ImageViewData")
$xmlDoc.SelectSingleNode("//FileHeader//Item//ImageViewDetail").AppendChild($CollectionNode)
$CollectionNode.SetAttribute("Selected","Yes")

但是它没有在第二个标签中添加，而是在第一个<ImageViewDetail>标签中添加了它。

还有一个问题：我想在标题为standalone="no"的标题部分添加另一个属性，

<?xml version="1.0" encoding="utf-8" standalone="no"?>"

如何做到？

Answer 1

可以像这样选择最后一个<ImageViewDetail>节点：

$xmlDoc.SelectSingleNode('//ImageViewDetail[last()]')

要选择其他节点，您必须设计一个XPath表达式来匹配要选择的特定节点。

可以这样更改XML声明：

$xmlDoc.ChildNodes[0].Value = 'version="1.0" encoding="utf-8" standalone="no"'

通过PowerShell在XML中重复子项目

1 个答案: