如何到达命名空间xml文件中的节点？

Question

I am trying to get a node out of an XML file and having a hell of a time. XML:

<?xml version="1.0" encoding="UTF-8"?>
<ApexPage xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>26.0</apiVersion>
    <label>aaaWsPage2</label>
    <description></description>
    <rffolder>Robert Test</rffolder>
</ApexPage>

I tried the following code:

var doc = new XmlDocument();
doc.Load(@"c:\test.xml");

var mgr = new XmlNamespaceManager(doc.NameTable);
mgr.AddNamespace("ns1", @"http://soap.sforce.com/2006/04/metadata");

XmlElement root = doc.DocumentElement;

string query = @"/ns1:ApexClass/ns1:rffolder";
var xmlNode = root.SelectSingleNode(query);
if (xmlNode != null)
   Console.WriteLine(xmlNode.InnerXml);

xmlNode is always null or I get an exception on .SelectSingleNode . What am I missing here?

Answer 1

I always find Linq To Xml easier to use

var xDoc = XDocument.Load(fname);
XNamespace ns = "http://soap.sforce.com/2006/04/metadata";

var folder = xDoc.Root.Element(ns + "rffolder").Value;

Answer 2

你可以试试这个吗？

XmlElement root = doc.DocumentElement.SelectSingleNode(@"//ns1:ApexClass/ns1:rffolder) as XmlElement;

Answer 3

You can use LinqToXml

 var node = XElement.Load(@"C:\Test.xml")
                    .Element(XName.Get("rffolder","http://soap.sforce.com/2006/04/metadata"));

Answer 4

If you don't want to use Linq2Xml:

first of all, in the XML the root is called ApexPage, not ApexClass, and you forgot to pass the XmlNamespaceManager to the SelectSingleNode.

So:

string query = @"/ns1:ApexPage/ns1:rffolder";
var xmlNode = root.SelectSingleNode(query, mgr);

Should work as well

Answer 5

尝试将查询字符串更改为：

string query = "//ns1:ApexClass/ns1:rffolder";