如何在C#中读取特定XML文件中的元素？

我的文件XML:

<document xmlns="http://www.abbyy.com/FineReader_xml/FineReader10-schema-v1.xml" version="1.0" producer="ABBYY FineReader Engine 11" languages="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.abbyy.com/FineReader_xml/FineReader10-schema-v1.xml http://www.abbyy.com/FineReader_xml/FineReader10-schema-v1.xml">
 <page width="1006" height="636" resolution="300" originalCoords="1" rotation="RotatedUpsidedown">


<block blockType="Text" blockName="" l="979" t="613" r="1006" b="636"><region><rect l="979" t="613" r="1006" b="636"/></region>
<text>
<par lineSpacing="890">
<line baseline="17" l="985" t="620" r="1006" b="636"><formatting lang="EnglishUnitedStates"><charParams l="985" t="620" r="1006" b="636" suspicious="1">r</charParams></formatting></line></par>
</text>
</block>


<block blockType="Barcode" blockName="" l="242" t="21" r="772" b="116"><region><rect l="242" t="21" r="772" b="116"/></region>
<text>
<par><line baseline="0" l="0" t="0" r="0" b="0"><formatting lang="">049102580225180310</formatting></line></par>
</text>
<barcodeInfo type="INTERLEAVED25"/>
</block>

</page>
</document>

---

但我什么都没有

这里有几个问题：

• 您的XML在根节点中具有默认命名空间：

  <document xmlns="http://www.abbyy.com/FineReader_xml/FineReader10-schema-v1.xml" version="1.0" 
  

  输出两个
  元素值的示例：

  { CodeBar = r }
  { CodeBar = 049102580225180310 }
  

  ---

  这是一个控制台程序，它获取第二个格式化（lang=''）节点

  var ns = racine.Name.Namespace; // The root default namespace used by all the elements in the XML.
  
  var query = from block in racine.Descendants(ns + "block")
              from formatting in block.Descendants(ns + "formatting")
              select new
              {
                  CodeBar= (string)formatting,
              };  
  

  { CodeBar = r }
  { CodeBar = 049102580225180310 }
  

  using System;
  using System.Xml;
  
  namespace ConsoleApplication1 {
      class Program {
          static void Main(string[] args) {
              XmlDocument xml = new XmlDocument();
              xml.Load("c:\\temp\\test.xml");
  
              NameTable nt = new NameTable();
              XmlNamespaceManager nsmgr;
              nsmgr = new XmlNamespaceManager(nt);
              nsmgr.AddNamespace("html", xml.DocumentElement.NamespaceURI);
  
              XmlNode ndFormat = xml.SelectSingleNode("//html:formatting[@lang='']", nsmgr);
              if (ndFormat != null) {
                  Console.WriteLine(ndFormat.InnerText);
              }
  
          }
      }
  }