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How to get xml tag which is in DataSet1 tag(C#)? [duplicate]

I'm loading a string into an XML document that contains the following structure:
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup>
<Compile Include="clsWorker.cs" />
</ItemGroup>
</Project>
Then I'm loading all into an XmlDocument:
XmlDocument xmldoc = new XmlDocument();
xmldoc.LoadXml(Xml);
Then the following problem occurs:
XmlNode Node = xmldoc.SelectSingleNode("//Compile"); // returns null
When I remove the xmlns attribute from the root element (Project), it works fine.
How do I get SelectSingleNode to return the relevant element?

You should use an XmlNamespaceManager in your call to SelectSingleNode():
XmlNamespaceManager ns = new XmlNamespaceManager(xmldoc.NameTable);
ns.AddNamespace("msbld", "http://schemas.microsoft.com/developer/msbuild/2003");
XmlNode node = xmldoc.SelectSingleNode("//msbld:Compile", ns);

Taken right from the documentation of SelectSingleNode() on the MSDN:
Note
If the XPath expression does not include a prefix, it is assumed that the
namespace URI is the empty namespace. If your XML includes a default
namespace, you must still add a prefix and namespace URI to the
XmlNamespaceManager; otherwise, you will not get a node selected. For
more information, see Select Nodes Using XPath Navigation.
And the immediately following sample code is
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("ab", "http://www.lucernepublishing.com");
XmlNode book = doc.SelectSingleNode("//ab:book", nsmgr);
It's not as if this would be "hidden knowledge". ;-)

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

Since the 'ItemGroup' may have multiple 'Compile' children, and you specifically want the 'Compile' children of 'Project/ItemGroup', the following will return all of the desired 'Compile' children and no others:
XmlDocument projectDoc = new XmlDocument();
projectDoc.Load(projectDocPath);
XmlNamespaceManager ns = new XmlNamespaceManager(projectDoc.NameTable);
ns.AddNamespace("msbld", "http://schemas.microsoft.com/developer/msbuild/2003");
XmlNodeList xnList = projectDoc.SelectNodes(#"/msbld:Project/msbld:ItemGroup/msbld:Compile", ns);
Note that the 'msbld:' namespace specification needs to precede each node level.

XPath does not work for selecting in XML

I have an XML document and for the life of me I cannot get data by using XPath. I've tried every sample I could find and no luck. I'm trying to extract the email address. Any thoughts?
The XML:
<?xml version="1.0" encoding="UTF-8"?>
<Document xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:hl7-org:v3" xsi:schemaLocation="urn:hl7-org:v3 CDA.xsd">
<typeId root="test1" extension="test2"/>
<id root="test3" extension="test4"/>
<code code="test5" codeSystem="test6" />
<effectiveTime value="201509171214"/>
<confidentialityCode code="N" codeSystem="test7" codeSystemName="test8" displayName="normal"/>
<languageCode code="en"/>
<recordTarget>
<Role>
<id root="000000" extension="number1"/>
<id root="11111" extension="number2"/>
<addr>
<streetAddressLine>Street</streetAddressLine>
<postalCode>12345</postalCode>
<city>City</city>
<state>STATE</state>
<country>COUNTRY</country>
</addr>
<telecom value="number" use="HP"/>
<telecom value="number" use="MC"/>
<telecom value="email#email"/>
<person>
<name>
<family>family</family>
<given>given</given>
<prefix/>
<suffix/>
</name>
<administrativeGenderCode code="C" codeSystem="code" codeSystemName="code name" displayName="c"/>
<birthTime value="N/A"/>
</person>
</Role>
</recordTarget>
</Document>
To load it:
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.LoadXml(STRING DATA FROM XML);
XPathNavigator foo = xmlDocument.CreateNavigator();
foo.MoveToFollowing(XPathNodeType.Element);
foo.Select("Document/recordTarget/Role");
I've also tried:
XmlNodeList xmlNodeList = xmlDocument.SelectNodes("/Document/recordTarget/Role");
But none of this works. Everything comes back empty. Any ideas? I can't seem to navigate past the root.
I've also tried adding the namespace manager in the selects, with no luck.
XmlNamespaceManager manager = new XmlNamespaceManager(xmlDocument.NameTable);

You must add a namespace
XPathNavigator navigator = xmlDocument.CreateNavigator();
XmlNamespaceManager manager = new XmlNamespaceManager(navigator.NameTable);
manager.AddNamespace("ns", "urn:hl7-org:v3");
var role = navigator.Select("/ns:Document/ns:recordTarget/ns:Role", manager);

Try this:
//Create a namespacemanager to get the defaultnamespace of the xml document
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xmlDocument.NameTable);
//XPath to find the tag that the value isn't equals to number, in this case, it will
//return the <telecom value="email#email"/> element
String xpathQuery = "//role//telecom[#value!='number']";
If you are going to use XPath to get some attribute value, after the XPathNavigator foo = xmlDocument.CreateNavigator(); you should
use the SelectSingleNode method:
//from the XPathNavigator object, we call the SelectSingleNode method, to select a single
//node using the specified xpath query and then call the GetAttribute method to finally
//get the value attribute from that element
String email = foo.SelectSingleNode(xpathQuery).GetAttribute"value",nsmgr.DefaultNamespace);

Insert node in xml document using c#

I was trying to insert an XML node in XML document at a specific position.
This is my xml:
<Envelope xmlns="http://schemas.xmlsoap.org/soap/envelope/">
<Body>
<readContract xmlns="http://implementation.company.schema.reference">
<ContactNumbers>10158</ContactNumbers>
<productGroups>0085</productGroups>
<indicationBalanceInfo>false</indicationBalanceInfo>
<indicationBlocked>true</indicationBlocked>
</readContract>
</Body>
</Envelope>
And am trying to insert another tag <productGroups>0093</productGroups> below to the tag <productGroups>0085</productGroups>
Expecting like the below:
<Envelope xmlns="http://schemas.xmlsoap.org/soap/envelope/">
<Body>
<readContract xmlns="http://implementation.company.schema.reference">
<ContactNumbers>10158</ContactNumbers>
<productGroups>0085</productGroups>
<productGroups>0093</productGroups>
<indicationBalanceInfo>false</indicationBalanceInfo>
<indicationBlocked>true</indicationBlocked>
</readContract>
</Body>
</Envelope>
Used the below C# code to achieve it.
XmlDocument doc = new XmlDocument();
string inputxml = this.StServiceCallActivity5.InputEnvelope.InnerXml.ToString();
//Here inputxml contains whole xml document.
string addxml = "<productGroups>0093</productGroups>";
doc.LoadXml(inputxml);
XmlDocumentFragment xmlDocFrag = doc.CreateDocumentFragment();
xmlDocFrag.InnerXml = addxml;
XmlElement parentEle = doc.DocumentElement;
parentEle.AppendChild(xmlDocFrag);
And it returns value like
<Envelope xmlns="http://schemas.xmlsoap.org/soap/envelope/">
<Body>
<readContract xmlns="http://implementation.company.schema.reference">
<ContactNumbers>10158</ContactNumbers>
<productGroups>0085</productGroups>
<productGroups>0093</productGroups>
<indicationBalanceInfo>false</indicationBalanceInfo>
<indicationBlocked>true</indicationBlocked>
</readContract>
</Body>
<productGroups xmlns="">0093</productGroups>
</Envelope>
Am a newbie to C# code, kindly help me to get the XML doc as expected.
your help is much appreciated.

When you do this:
XmlElement parentEle = doc.DocumentElement;
parentEle.AppendChild(xmlDocFrag);
You're appending the node to the root of the document. You probably wanted to select the actual readContract node that the item is supposed to be appended into. As an example:
XmlNode newNode = doc.CreateNode(XmlNodeType.Element, "productGroup", "");
newNode.InnerText = "something";
XmlNode readContractNode = doc["Envelope"]["Body"]["readContract"];
XmlElement groups = readContractNode["productGroups"];
readContractNode.InsertAfter(newNode, groups);
Of course you'd probably want to handle the case where there are already multiple child productGroup elements, but the idea is the same.

Looks like namespaces are causing the problem. This worked for me:
XmlDocument doc = new XmlDocument();
doc.LoadXml(File.ReadAllText("XMLFile1.xml"));
XmlNamespaceManager ns = new XmlNamespaceManager(doc.NameTable);
ns.AddNamespace("ns1", "http://schemas.xmlsoap.org/soap/envelope/");
ns.AddNamespace("ns2", "http://implementation.company.schema.reference");
var rootNode = doc.SelectSingleNode("//ns1:Envelope", ns);
var readContractNode = rootNode.FirstChild.FirstChild;
var newNode = doc.CreateNode(XmlNodeType.Element, "productGroups", "http://implementation.company.schema.reference");
newNode.InnerText = "0093";
readContractNode.InsertAfter(newNode, readContractNode.SelectSingleNode("//ns2:productGroups", ns));
Or if you don't fancy namespaces like I me, you can try a bit more "brute-forcy" approach:
XmlDocument doc = new XmlDocument();
doc.LoadXml(File.ReadAllText("XMLFile1.xml"));
var newNode = doc.CreateNode(XmlNodeType.Element, "productGroups", "http://implementation.company.schema.reference");
newNode.InnerText = "0093";
doc.FirstChild.FirstChild.FirstChild.InsertAfter(newNode, doc.FirstChild.FirstChild.FirstChild.FirstChild.NextSibling);
It can be optimized but I think it helps to make the point that root cause is the different namespaces in the document.

You may want to use XmlNode.InsertAfter Method.
public virtual XmlNode InsertAfter(
XmlNode newChild,
XmlNode refChild
)
Where
newChild = The XmlNode to insert
and
refChild = The XmlNode that is the reference node. The newNode is placed after the refNode
Please check this link for information.
And check this link with answer on SO.
P.S.
Always check other answers before posting new question.

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.