Question

I m试图利用权力指挥选择Xml从Xml档案中挑选数据。在我指挥下,没有结果或错误被退回。我预计,这些版本的清单将归还给屏幕。这有什么错误?

PS C:> select-xml -path "C:	.xml" -xpath "//edition" | foreach {$_.node.InnerXML}
PS C:>

The XML file (C: .xml) is:

 <?xml version="1.0" encoding="utf-8"?>
  <Book>
    <projects>
      <project name="Book1" date="2009-01-20">
        <editions>
           <edition language="English">En.Book1.com</edition>
           <edition language="German">Ge.Book1.Com</edition>
           <edition language="French">Fr.Book1.com</edition>
           <edition language="Polish">Pl.Book1.com</edition>
        </editions>
      </project>
    </projects>
  </Book>

Answer 1

因此,我知道什么是错误的。在《XML宣言》第1节之前有一个白色空间。确实是一句空话。第一行:

PS H:> $xml = ([xml](Get-Content -Path C:scripts	.xml)).Book.Projects.Project

它错误如下:

"..The XML declaration must be the first node in the document, and no white space characters are allowed to appear before it..."

我确信,在试图阅读Xml文档时,选择xml在问题中应当失败。 xml案在IE进行了罚款。

Answer 2

这样做的另一个途径是:

PS H:> $xml = ([xml](Get-Content -Path C:scripts	.xml)).Book.Projects.Project
PS H:> $xml.editions | select -ExpandProperty Edition

language                                                    #text
--------                                                    -----
English                                                     En.Book1.com
German                                                      Ge.Book1.Com
French                                                      Fr.Book1.com
Polish                                                      Pl.Book1.com

Answer 3

1 P-4, 1 P-3, 1 P-2, 1 GS Xml.XmlElement, 没有内心 Xml 财产

Select-Xml -Path C:	.xml -XPath "//edition" | 
    % {$_.node} | get-member | out-gridview

Answer 4

这里还有另外几个选择:

$xml = [xml]@ 
<?xml version="1.0" encoding="utf-8"?>   
<Book>
  <projects>
    <project name="Book1" date="2009-01-20">
      <editions>
        <edition language="English">En.Book1.com</edition>
        <edition language="German">Ge.Book1.Com</edition>
        <edition language="French">Fr.Book1.com</edition>            
        <edition language="Polish">Pl.Book1.com</edition>         
      </editions>       
    </project>     
  </projects>   
</Book> 
 @

$xml | Select-Xml  //edition/text()  | Foreach {"$_"}

$xml | Select-Xml  //edition  |  Foreach {$_.Node.InnerText}

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