如何获取 xml 文档的所有命名空间以进行正确的 XPath 评估？

Question

I try to evaluate simple xpath

"//pr:Name"

for this xml

<?xml version="1.0" encoding="utf-8"?>
<pr:Products xmlns:pr="http://www.example.com/">
    <pr:Name>Coffee</pr:Name>
</pr:Products>

but I get xml file in run-time ie I can't fill XmlNamespaceManager using method AddNamespace() (this why evaluating failed). I tried to do this trick

    XDocument xdoc;
    XmlReader reader;
    using (var stream = new FileStream("test.xml", FileMode.Open))
    {
        reader = new XmlTextReader(stream);
        xdoc = XDocument.Load(reader);
    }
    var nsManager = new XmlNamespaceManager(reader.NameTable);
    var xpath = "//pr:Name";
    var xvalue = xdoc.XPathEvaluate(xpath, nsManager);

but it does not help me. Do you have any idea how to resolve namespaces for XPath or evaluate XPath in other way? Thank you!

Answer 1

If you don't know namespace at compile time, you might probably use this XPath:

//*[local-name() = 'Name']

This XPath selects all Name elements.