[英]get a list of attribute values in xml
Is there a way to get a list of the values of the attributes for specific b (for example r4)? 有没有一种方法可以获取特定b的属性值列表(例如r4)?
List<string>
that contains: "p3e3" and "p3e4" List<string>
包含:“ p3e3”和“ p3e4”
<a>
<b id="r4" Name="b 4">
<P>
<Pr id="p3e3" />
<Pr id="p3e4" />
</P>
</b>
<b id="r5" Name="b 5">
....
</b>
</a>
The most I got was a List<XElement>
that contained " <Pr id="p3e3" />
" and " <Pr id="p3e4" />
" 我得到的最多是一个List<XElement>
,其中包含“ <Pr id="p3e3" />
“和” <Pr id="p3e4" />
“
var xdoc = XDocument.Load(path_to_xml);
var result = xdoc.Root.Elements("b")
.Where(b => (string)b.Attribute("id") == "r4")
.SelectMany(b => b.Element("P").Elements("Pr"))
.Select(pr => (string)pr.Attribute("id"));
Or with XPath: 或使用XPath:
var result = xdoc.XPathSelectElements("a/b[@id='r4']/P/Pr")
.Select(pr => (string)pr.Attribute("id"));
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