考虑下面的XML：

<response>
  <status_code>200</status_code>
  <status_txt>OK</status_txt>
  <data>
    <url>http://bit.ly/b47LVi</url>
    <hash>b47LVi</hash>
    <global_hash>9EJa3m</global_hash>
    <long_url>http://www.tumblr.com/docs/en/api#api_write</long_url>
    <new_hash>0</new_hash>
  </data>
</response>

我在寻找一个非常短的方式来获得＆LT的只是价值;散＆GT; 元素。我想：

var hash = xml.Element("hash").Value;

但是，这不是工作。是否有可能提供一个XPath查询到的XElement ？我能做到这一点的老的System.Xml 框架下，做一些这样的：

But that's not working. Is it possible to provide an XPath query to an XElement? I can do it with the older System.Xml framework, doing something like:

xml.Node("/response/data/hash").Value

有没有这样的事情在LINQ命名空间？

Is there something like this in a LINQ namespace?

更新：

胡闹围绕这一一些我找到了一种方法做我想要做后：

After monkeying around with this some more I found a way to do what I'm trying to do:

var hash = xml.Descendants("hash").FirstOrDefault().Value;

我仍然有兴趣看看是否有人有一个更好的解决方案？

I'd still be interested to see if anyone has a better solution?

推荐答案

要使用XPath使用LINQ到XML的 System.Xml.XPath 添加一个using声明，这将带来的System.Xml.XPath.Extensions为范围。

To use XPath with LINQ to XML add a using declaration for System.Xml.XPath, this will bring the extension methods of System.Xml.XPath.Extensions into scope.

在您的例子：

var value = (string)xml.XPathEvaluate("/response/data/hash");