[英]PowerShell: Parse through xml Nodes via xpath and create output string
i have following example XML我有以下示例 XML
<AlarmGroup xmlns="http://.." Name="example">
<TextGroup>
<TextLayer LanguageId="en">
<Text ID="1" Value="not used / unknown"/>
<Text ID="2" Value="not used / unknown"/>
<Text ID="3" Value="not used / unknown"/>
<Text ID="4" Value="not used / unknown"/>
</TextLayer>
<TextLayer LanguageId="de">
<Text ID="1" Value="not used / unknown"/>
...
</TextLayer>
' I try to go through each Texlayer and build a string like the following: ' 我尝试通过每个 Texlayer go 并构建如下字符串:
en;1;not used / unknown zh;1;未使用/未知
en;2;not used / unknown zh;2;未使用/未知
I have tried many ways, for example:我尝试了很多方法,例如:
$AlarmgroupLanguageText = Select-Xml -Xml $Content -XPath "//example:TextLayer" -namespace $ns | select -ExpandProperty node
$AlarmgroupLanguageText.TextLayer |foreach{
$AlarmgroupLanguageText |foreach{
$output += $_.LanguageID + ";" + $_.Text.ID + ";" + $_.Text.Value + "`r`n"
}
It would be great if someone could help me request this layman's Question.如果有人可以帮助我提出这个外行的问题,那就太好了。
TIA TIA
As @Matthias R. Jessen suggested in the comments, your XPath is a bit wonky.正如@Matthias R。Jessen 在评论中建议,您的 XPath 有点不稳定。 However, once you've got that working there's a few other things wrong with your code as well, so stepping back a bit, here's a slightly different way to do it:但是,一旦您开始工作,您的代码也会出现一些其他问题,所以退后一步,这里有一种稍微不同的方法:
$xml = [xml] @"
<AlarmGroup xmlns="http://.." Name="example">
<TextGroup>
<TextLayer LanguageId="en">
<Text ID="1" Value="not used / unknown"/>
<Text ID="2" Value="not used / unknown"/>
<Text ID="3" Value="not used / unknown"/>
<Text ID="4" Value="not used / unknown"/>
</TextLayer>
<TextLayer LanguageId="de">
<Text ID="1" Value="not used / unknown"/>
</TextLayer>
</TextGroup>
</AlarmGroup>
"@;
# 1. find a root <AlarmGroup> where Name="example"
$alarmGroup = @( $xml.AlarmGroup | where-object { $_.Name -eq "example" } )[0];
# 2. get all the child <Text> nodes nested under the <AlarmGroup>
$textNodes = @( $alarmGroup.TextGroup.TextLayer.Text );
# 3. format each <Text> node into a string
$textLines = $textNodes | foreach-object {
$_.ParentNode.LanguageId + ";" + $_.ID + ";" + $_.Value
};
# 4. concatenate all the strings together
$output = $textLines -join "`r`n";
# 5. show the result
$output
# en;1;not used / unknown
# en;2;not used / unknown
# en;3;not used / unknown
# en;4;not used / unknown
# de;1;not used / unknown
The tricksy bit is $alarmGroup.TextGroup.TextLayer.Text
- this uses Member Enumeration to expand the TextGroup
and TextLayer
nodes to get all the nested Text
nodes - in this case, it's basically equivalent to the XPath //TextGroup/TextLayer/Text
.棘手的一点是$alarmGroup.TextGroup.TextLayer.Text
- 它使用成员枚举来扩展TextGroup
和TextLayer
节点以获取所有嵌套的Text
节点 - 在这种情况下,它基本上等同于 XPath //TextGroup/TextLayer/Text
。
The rest is hopefully self-explanatory... rest 希望是不言自明的......
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