xml错误:System.xml.XPath.XPathException:表达式必须计算为节点集

本文关键字：xml 计算节点点集表达式错误 System XPath XPathException | 更新日期: 2023-09-27 18:20:17

我试图在xml文件中找到一个节点，但收到错误（请参阅标题）？

 // instantiate XmlDocument and load XML from file
        XmlDocument doc = new XmlDocument();
        doc.Load(@"C:'temp'test2.xml");
        var  node = doc.SelectSingleNode("/Offers/Offer/ID=[text()='1']");
        var test = node;

xml

<?xml version="1.0" encoding="utf-8"?>
<Offers>
  <Offer>
    <Model>AAAA</Model>
    <ID>1</ID>
    <Name>First offer</Name>
  </Offer>
  <Offer>
    <Model>BBBB</Model>
    <ID>2</ID>
    <Name>Second offer</Name>
  </Offer>
  </Offers>

xml错误:System.xml.XPath.XPathException:表达式必须计算为节点集

删除ID:后的=

 var  node = doc.SelectSingleNode("/Offers/Offer/ID=[text()='1']");

变为：

 var  node = doc.SelectSingleNode("/Offers/Offer/ID[text()='1']");