如何使用 Select-Xml 和 Xpath 在 Powershell 中解析 XML? [英] How to parse XML in Powershell with Select-Xml and Xpath?

问题描述

这个例子的明显输出是日期和时间.

obvious output for this example would be the date and time.

在迭代 xml 文档的上下文中，该文档如何正确转换或 在 上的 Powershell dotnet 核心中转换为 xmlLinux?

In the context of iterating over an xml document, how is this document correctly cast or converted to xml in Powershell dotnet core on Linux?

PS /home/nicholas/flwor> 
PS /home/nicholas/flwor> Select-Xml -Xml (Get-Date | ConvertTo-Xml) -XPath "/Objects/Object"

Node   Path        Pattern
----   ----        -------
Object InputStream /Objects/Object

PS /home/nicholas/flwor> 
PS /home/nicholas/flwor> (Get-Date | ConvertTo-Xml).OuterXml                                
<?xml version="1.0" encoding="utf-8"?><Objects><Object Type="System.DateTime">12/10/2020 5:12:45 AM</Object></Objects>
PS /home/nicholas/flwor> 

更新了最简单的例子.

所以，这个例子是 xml 但是:它是如何用 xpath 解析或查询的?

So, this example is xml but: how is it parsed or queried with xpath?

IRC 中给出的替代解决方案:

alternate solution given in IRC:

PS /home/nicholas/flwor> 
PS /home/nicholas/flwor> $date.SelectSingleNode('/Objects/Object').'#text'
12/10/2020 5:07:04 AM
PS /home/nicholas/flwor> 

毫无疑问，使用 Select-Xml 和 Xpath 是可行的.

no doubt that's doable with Select-Xml and Xpath.

推荐答案

如果尴尬，这有效:

PS /home/nicholas/flwor> 
PS /home/nicholas/flwor> Select-Xml -Xml (Get-Date | ConvertTo-Xml) -XPath "/Objects/Object" |  Select-Object -ExpandProperty Node

Type            #text
----            -----
System.DateTime 12/10/2020 5:23:39 AM

PS /home/nicholas/flwor> 

帮助文件有一个类似的例子.

the help files had a similar example.

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