检索 XML 树值的特定部分 [英] Retrieve specific part of XML tree value

问题描述

有一个用数据填充的 Xml.XmlNodeList 变量xmlNodes".xmlNodes(0).InnerText 包含以下内容:

Have an Xml.XmlNodeList variable "xmlNodes", populated with data. The xmlNodes(0).InnerText contains the following:

<InitializePagedPull ShowCode="AR13dfD">
   <TokenInfo PageToken="293845657-32-47" TotalRecords="1" PageSize="20" TotalPages="1" />
</InitializePagedPull>

我想获得 TokenInfo.PageToken 值......而不必使用一些古老的string.indexOf() string.substring(x,y)"方法

I'd like to get the TokenInfo.PageToken value... without having to use some archaic method of "string.indexOf() string.substring(x,y)"

我尝试基于当前的 xmlNodes(0).InnerText 创建一个子 XmlDocument...然后使用 GetElementsByTagName("TokenInfo")...这让我更接近...但我仍然无法轻松获取其中的 PageToken 值.

I've tried creating a child XmlDocument based on the current xmlNodes(0).InnerText... and then using GetElementsByTagName("TokenInfo")... which gets me a little closer... but I'm still unable to easily grab the PageToken value within.

推荐答案

使用 XPath 的答案仍然过时.自从 LINQ to XML 统治所有这些以来，已经十多年了.来吧.

The answer that is using XPath is still archaic. It is already more than a decade since LINQ to XML rules them all. Here we go.

c#

void Main()
{
    XElement xml = XElement.Parse(@"<InitializePagedPull ShowCode=""AR13dfD""><TokenInfo PageToken=""293845657-32-47"" TotalRecords=""1"" PageSize=""20"" TotalPages=""1""/></InitializePagedPull>");
    string pageToken = xml.Descendants().Attributes("PageToken").FirstOrDefault().Value;
}

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