选择XElement，其中子元素具有值 [英] Select XElement where child element has a value

问题描述

给出以下XML:

<platforms>
  <platform>
    <id>1</id>
    <price>2.99</price>
  </platform>
</platforms>

如何基于值为"1"的子元素"id"选择"platform"元素作为XElement对象?

How can I select the "platform" element as an XElement object based on the child element "id" having a value of "1"?

我已经走了这么远:

XDocument xPlatformXml = new XDocument();
XElement xel = xPlatformXml.Element("platforms").Elements("platform").Where(x => x.Value == "1").SingleOrDefault();

但这是要在"platform"元素而不是"id"中查找值.

But this is looking for the value to be in "platform" element rather than "id".

推荐答案

XDocument xPlatformXml = new XDocument();
XElement xel = xPlatformXml.Element("platforms")
                           .Elements("platform")
                           .Where(x => x.Element("id").Value == "1")
                           .SingleOrDefault();

或使用XElement到int转换:

XDocument xPlatformXml = new XDocument();
XElement xel = xPlatformXml.Element("platforms")
                           .Elements("platform")
                           .Where(x => (int)x.Element("id") == 1)
                           .SingleOrDefault();

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