C# XmlDocument-选择名称空间为的SingleNode

这是我的代码：

XmlTextReader reader = new XmlTextReader(xmlPath);
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(reader);
XmlNode root = xmlDoc.DocumentElement;

XmlNode node = root.SelectSingleNode("marketingid");

有效的XML：

<confirmsubmit>
    <marketingid>-1</marketingid>
</confirmsubmit>

XmlTextReader reader = new XmlTextReader(xmlPath);
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(reader);

XmlNamespaceManager nsmgr = new XmlNamespaceManager(xmlDoc.NameTable);
nsmgr.AddNamespace("ns", xmlDoc.DocumentElement.NamespaceURI);

XmlNode book = xmlDoc.SelectSingleNode("/ns:confirmsubmit/ns:marketingid", nsmgr);

---

所有XPath都比看起来更复杂，我建议像我这样的读者阅读：

xmlns

属性用于XHTML并定义文档的名称空间。您可以像这样解析它：

XDocument xdoc = XDocument.Load(xmlPath);
var attrib = xdoc.Root.Attribute("xmlns").Value;

---

您需要在游戏中添加XmlNamespaceManager实例：

public class Sample
{
 public static void Main()
{

  XmlDocument doc = new XmlDocument();
  doc.Load("booksort.xml");

  //Create an XmlNamespaceManager for resolving namespaces.
  XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
  nsmgr.AddNamespace("bk", "urn:samples");

  //Select and display the value of all the ISBN attributes.
  XmlNodeList nodeList;
  XmlElement root = doc.DocumentElement;
  nodeList = root.SelectNodes("/bookstore/book/@bk:ISBN", nsmgr);
  foreach (XmlNode isbn in nodeList){
    Console.WriteLine(isbn.Value);
  }

}

}

---

以下是如何从Linq转换为XML。简明扼要

    const string xml = @"<confirmsubmit xmlns='http:....'>
                           <marketingid>-1</marketingid>
                         </confirmsubmit>";

    XElement element = XElement.Parse(xml);
    var requestedElement = element.Elements().FirstOrDefault(x => x.Name.LocalName.Equals("marketingid"));

conststringxml=@”
-1
";
XElement元素=XElement.Parse（xml）；
var requestedElement=element.Elements（）.FirstOrDefault（x=>x.Name.LocalName.Equals（“marketingid”）；

是！裁判：

    const string xml = @"<confirmsubmit xmlns='http:....'>
                           <marketingid>-1</marketingid>
                         </confirmsubmit>";

    XElement element = XElement.Parse(xml);
    var requestedElement = element.Elements().FirstOrDefault(x => x.Name.LocalName.Equals("marketingid"));