Linq to XML-提取单个元素 [英] Linq to XML - Extract Single Element

问题描述

我有一个XML/Soap文件，如下所示:

I have an XML/Soap file that looks like this:

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <soap:Body>
    <SendData xmlns="http://stuff.com/stuff">
      <SendDataResult>True</SendDataResult>
    </SendData>
  </soap:Body>
</soap:Envelope>

我想提取SendDataResult值，但是用下面的代码和我尝试过的各种其他方法很难提取出来.即使元素中有值，它也总是返回null.

I want to extract the SendDataResult value but am having difficulty doing so with the following code and various other methods I've tried. It always returns null even though there's a value in the element.

XElement responseXml = XElement.Load(responseOutputFile);
string data = responseXml.Element("SendDataResult").Value;

要提取SendDataResult元素需要做些什么.

What needs to be done to extract the SendDataResult element.

推荐答案

您可以使用Descendants，然后使用First或Single-当前，您正在询问顶级元素它的正下方有一个SendDataResult元素，而实际上没有.此外，您没有使用正确的名称空间.这应该解决它:

You can use Descendants followed by First or Single - currently you're asking the top level element whether it's got a SendDataResult element directly beneath it, which it hasn't. Additionally, you're not using the right namespace. This should fix it:

XNamespace stuff = "http://stuff.com/stuff";
string data = responseXml.Descendants(stuff + "SendDataResult")
                         .Single()
                         .Value;

或者，直接导航:

XNamespace stuff = "http://stuff.com/stuff";
XNamespace soap = "http://www.w3.org/2003/05/soap-envelope";
string data = responseXml.Element(soap + "Body")
                         .Element(stuff + "SendDataResult")
                         .Value;

这篇关于Linq to XML-提取单个元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！