I want to process the xml below with XPath:
<?xml version="1.0" encoding="utf-8"?>
<ServiceConfiguration serviceName="Cloud" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" osFamily="4" osVersion="*" schemaVersion="2014-01.2.3">
<Role name="Worker">
<Instances count="2" />
<ConfigurationSettings>
<Setting name="setting1" value="value1" />
<Setting name="setting2" value="value2" />
</ConfigurationSettings>
<Certificates>
</Certificates>
</Role>
</ServiceConfiguration>
Tere's a xmlns
for the root element.
My code is this:
XElement doc = XElement.Load(xmlFilePath);
XmlNamespaceManager ns = new XmlNamespaceManager(new NameTable());
ns.AddNamespace("prefix", "http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration");
XElement settingDiagConnectionString = doc.XPathSelectElement("//prefix:ServiceConfiguration/Role/ConfigurationSettings/Setting[1]", ns); // <===== always return null.
settingDiagConnectionString.SetAttributeValue("value", "hello, world!");
But the settingDiagConnectionString
is always null.
Why?
Add 1
Thanks har07.
After adding prefix for every element, the following code works:
XmlDocument doc = new XmlDocument();
doc.Load(cscfgPath);
XmlNamespaceManager ns = new XmlNamespaceManager(new NameTable());
ns.AddNamespace("prefix", "http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration");
XmlNode settingDiagConnectionString = doc.SelectNodes("/prefix:ServiceConfiguration/prefix:Role/prefix:ConfigurationSettings/prefix:Setting[1]", ns)[0];
settingDiagConnectionString.Attributes["value"].Value = "hello,world!";
But the following code still don't work. The settingDiagConnectionString
is still null. Why?
XElement doc = XElement.Load(cscfgPath);
XmlNamespaceManager ns = new XmlNamespaceManager(new NameTable());
ns.AddNamespace("prefix", "http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration");
XElement settingDiagConnectionString = doc.XPathSelectElement("/prefix:ServiceConfiguration/prefix:Role/prefix:ConfigurationSettings/prefix:Setting[1]", ns);
settingDiagConnectionString.SetAttributeValue("value", "hello, world!");
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