We Keep Coding

c# get values from xml response

I am trying to get values from xml respone :
<?xml version="1.0" encoding="utf-8"?>
<Response xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://adaddaasd.com">
<A>14</A>
<B>Failed</B>
<C>22</C>
</Response>
My code is :
string responseString = await response.Content.ReadAsStringAsync();
var xDocument = XDocument.Parse(responseString);
var responseNode = xDocument.XPathSelectElement("/Response");
var A = xDocument.XPathSelectElement("/Response/A");
But I am getting null values for A and responseNode. Whats wrong? Thanks

You're blatantly ignoring the XML namespace that's defined in your XML document:
<Response xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
xmlns:xsd='http://www.w3.org/2001/XMLSchema'
xmlns='http://adaddaasd.com'>
****************************
You need to include that into your querying - I would try to do it like this:
var xDocument = XDocument.Parse(responseString);
// *define* your XML namespace!
XNamespace ns = "http://adaddaasd.com";
// get all the <Response> nodes under the root with that XML namespace
var responseNode = xDocument.Descendants(ns + "Response");
// from the first <Response> node - get the descendant <A> nodes
var A = responseNode.FirstOrDefault()?.Descendants(ns + "A");
If you insist on using the XPathSelectElement method, then you must define an XmlNamespaceManager and use it in your XPath select:
// define your XML namespaces
XmlNamespaceManager xmlnsmgr = new XmlNamespaceManager(new NameTable());
xmlnsmgr.AddNamespace("ns", "http://adaddaasd.com");
// use the defined XML namespace prefix in your XPath select
var A = xDocument.XPathSelectElement("/ns:Response/ns:A", xmlnsmgr);

Linq to XML with Namespace Prefix Not Working

I have been working from Scott Allen's Puralsight course on Linq Fundamentals and this linked section describes reading xml with Namespace prefixes, yet I'm not able to make this work.
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<OutboundEvent
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:abb.com:assetsuite:IF:Event http://apifw/devifa/xml/GeneralLedger/GeneralLedger.Publish.Event.V940.xsd"
xmlns="urn:abb.com:assetsuite:IF:Event"
xmlns:hdr="urn:abb.com:assetsuite:IF:Header"
xmlns:bo="urn:abb.com:assetsuite:IF:BO"
xmlns:boe="urn:abb.com:assetsuite:IF:IFExtension"
>
...
<bo:BusinessObject>
...
</bo:BusinessObject>
</OutboundEvent>
I should be getting a single XElement returned from the following code, yet I am not:
var document = XDocument.Load(path);
var bo = (XNamespace)"urn:abb.com:assetsuite:IF:BO";
var businessobjects =
from elements in document.Element("OutboundEvent")?.Elements(bo + "BusinessObject")
?? Enumerable.Empty<XElement>()
select elements;

The OutboundEvent node is in a namespace but your code references it as if it wasn't. It is in the urn:abb.com:assetsuite:IF:Event namespace.
XNamespace ns = "urn:abb.com:assetsuite:IF:Event";
XNamespace bo = "urn:abb.com:assetsuite:IF:BO";
var businessObjects =
document.Elements(ns + "OutboundEvent").Elements(bo + "BusinessObject");

Shouldn't you define and use the default namespace for OutboundEvent element?
var document = XDocument.Load(path);
var ns = (XNamespace)"urn:abb.com:assetsuite:IF:Event";
var bo = (XNamespace)"urn:abb.com:assetsuite:IF:BO";
var businessobjects =
from elements in document.Element(ns + "OutboundEvent")?.Elements(bo + "BusinessObject")
?? Enumerable.Empty<XElement>()
select elements;

Cannot parse XML with xmlns value

I receive an XML file which has on the root node a xmlns namespace assigned:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Message xmlns="http://www.myAddress.com/DataRequest/message/">
<Date>2017/01/01</Date>
</Message>
I do not know how to retrive the Date element using XPath, I tried
var root = xDocument.Root;
var dateElement = root.XPathSelectElement("/Message/Date");
If I remove the namespace from the root xml, then I can retrieve the value using "/Message/Date".
I tried to add xmlns to a XmlNamespaceManager, but I get this error:
Prefix "xmlns" is reserved for use by XML.
How can I get the value?

You should use namespace when you specify element's name. Default namespace is easy to get with XElement.GetDefaultNamespace() method:
var ns = root.GetDefaultNamespace();
var dateElement = (DateTime)root.Element(ns + "Date");
If you want to use XPath:
XmlNamespaceManager manager = new XmlNamespaceManager(new NameTable());
manager.AddNamespace("ns", root.GetDefaultNamespace().ToString());
var dateElement = (DateTime)root.XPathSelectElement("/ns:Message/ns:Date", manager);

I would suggest using LINQ.
Here is a link to the code example:https://msdn.microsoft.com/en-us/library/mt693115.aspx
here is the code:
XElement root = XElement.Load("Message.xml");
IEnumerable<XElement> dateNode=
from el in root.Elements("Date")
select el;
foreach (XElement el in dateNode)
Console.WriteLine(el);

Finding Correct Xpath C# [duplicate]

I'm having this XML document with namespaces and I want to extract some nodes using XPath.
Here's the document:
<ArrayOfAnyType xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://tempuri.org/">
<anyType xsi:type="Document">
<Id>5</Id>
<Title>T1</Title>
</anyType>
<anyType xsi:type="Document">
<Id>15</Id>
<Title>T15</Title>
</anyType>
</ArrayOfAnyType>
What's the XPath expression going to be if I want to extract all "anyType" elements with xsi:type="Document"?
I've tried this:
//anyType[#xsi:type="Document"]
and it doesn't work:

If you are using C# then you need to specify the namespace for the "anyType" element in your XPath:
var xml = new XmlDocument();
xml.LoadXml( "your xml" );
var names = new XmlNamespaceManager( xml.NameTable );
names.AddNamespace( "xsi", "http://www.w3.org/2001/XMLSchema-instance" );
names.AddNamespace( "a", "http://tempuri.org/" );
var nodes = xml.SelectNodes( "//a:anyType[#xsi:type='Document']", names );

I think that
//anyType[namespace-uri() = "http://www.w3.org/2001/XMLSchema-instance"][local-name() = "type"]
Will do what you want.

This way you don't need to specify namespace:
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml("your xml");
XmlNode node = xmlDoc.SelectSingleNode("/*[local-name() = 'anyType']");
XmlNode nodeToImport = xmlDoc2.ImportNode(node, true);
xmlDoc2.AppendChild(nodeToImport);

Had nearly the same problem, I forgot to add the correct namespace for xsi:type
(http://www.w3.org/2001/XMLSchema-instance) was using http://www.w3.org/2001/XMLSchema
and I did never get any result - now it is working the following way:
<xsl:value-of select="/item1/item2/item3/#xsi:type"></xsl:value-of>

Cannot get XPath to work with unnamed namespace

The XML (fragment):
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<GetXMLResponse xmlns="http://sitecore.net/visual/">
<GetXMLResult>
<sitecore xmlns="">
<status>ok</status>
The code (fragment):
XmlNamespaceManager nsManager = new XmlNamespaceManager(template.NameTable);
nsManager.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/");
nsManager.PushScope();
XmlNode sitecoreRoot = template.SelectSingleNode("/soap:Envelope/soap:Body/*[namespace-uri()='http://sitecore.net/visual/' and local-name()='GetXMLResponse']", nsManager);
string status = sitecoreRoot.SelectSingleNode("/GetXMLResult/sitecore/status").Value;
sitecoreRoot element returns the correct node. However the XPath to get the status always returns null, even though the siteCoreRoot.OuterXMl property shows the element is present.
The only thing I can think of is the line:
<sitecore xmlns="">
is throwing off the XPath
TIA

XmlNamespaceManager ns = new XmlNamespaceManager(cd.NameTable);
ns.AddNamespace("sp", "http://schemas.xmlsoap.org/soap/envelope/");
ns.AddNamespace("sc", "http://sitecore.net/visual/");
XmlNode sitecoreRoot = cd.SelectSingleNode("//sp:Envelope/sp:Body/sc:GetXMLResponse/sc:GetXMLResult/sitecore/status", ns);
var status = sitecoreRoot.InnerText;
May help you?

If you just want the status node, you can try this xml library and the following XPath.
XElement root = XElement.Load(file); // or .Parse(string)
XElement status = root.XPathElement("//status");
The library handles doing the namespace for you.