Develop Reference

Unable select XmlNode by Xpath with two attributes

I have xml as a response, need to find marked red arrow node:
My code:
//response to xmlDocument
document = new XmlDocument();
document.LoadXml(response.Content);
XmlNamespaceManager ns = new XmlNamespaceManager(document.NameTable);
foreach (XmlAttribute curAttribute in document.DocumentElement.Attributes)
{
if (curAttribute.Prefix.Equals("xmlns"))
{ ns.AddNamespace(curAttribute.LocalName, curAttribute.Value); }
}
string xpath = "//edmx:Edmx/edmx:DataServices/Schema[#Namespace='Core.Entities']/EntityType[#Name='Office']/Property[#Name='OfficeKeyNumeric']";
XmlNode node = document.SelectSingleNode(xpath, ns);
}
I have an error that node can't be found by given XPath, node is null.
What I tried:
with and
string xpath = "//edmx:Edmx/edmx:DataServices/Schema[#Namespace='Core.Entities' and #xmlns='http://docs.oasis-open.org/odata/ns/edm']/EntityType[#Name='Office']/Property[#Name='OfficeKeyNumeric']";
without and
string xpath = "//edmx:Edmx/edmx:DataServices/Schema[#Namespace='Core.Entities'][#xmlns='http://docs.oasis-open.org/odata/ns/edm']/EntityType[#Name='Office']/Property[#Name='OfficeKeyNumeric']";
Tried also with pipe |, & - nothing helped.
Why it doesn't work and is it possible to make it work in that way?
The only one working solution I'm using now is to remove xmlns="http://docs.oasis-open.org/odata/ns/edm"from XML document before loading, after that my code above works fine.
document.LoadXml(response.Content.Replace("xmlns=\"http://docs.oasis-open.org/odata/ns/edm\"", ""));

The Schema element and its descendants are declared in the http://docs.oasis-open.org/odata/ns/edm namespace, which must be referenced in the
xpath statement you are looking for.
string xpath = "//edmx:Edmx/edmx:DataServices/edm:Schema[#Namespace='Core.Entities']/edm:EntityType[#Name='Office']/edm:Property[#Name='OfficeKeyNumeric']";
Make sure to have your XmlNamespaceManager initialized with these namespaces.
XmlNamespaceManager ns = new XmlNamespaceManager(document.NameTable);
ns.AddNamespace("edmx","http://docs.oasis-open.org/odata/ns/edmx");
ns.AddNamespace("edm","http://docs.oasis-open.org/odata/ns/edm");

Can't find a certain node in XML

My problem is that I can't seem to get a list of nodes I need. I have tried multiple solutions and it doesn't seem to work. This is a part of my xml file:
<findItemsByCategoryResponse xmlns="http://www.ebay.com/marketplace/search/v1/services">
<ack>Success</ack>
<version>1.13.0</version>
<timestamp>2016-08-23T07:33:22.497Z</timestamp>
<searchResult count="100">
<item>
<itemId>152210133431</itemId>
<title>...</title>
<globalId>EBAY-GB</globalId>
<primaryCategory>
<categoryId>218</categoryId>
<categoryName>Magic the Gathering</categoryName>
</primaryCategory>
<galleryURL>
http://thumbs4.ebaystatic.com/m/meIDrVqhmbpQMYCxzeUvR9Q/140.jpg
</galleryURL>
<viewItemURL>
http://www.ebay.co.uk/itm/MTG-See-Unwritten-Khans-Tarkir-MYTHIC-MINT-/152210133431
</viewItemURL>
<paymentMethod>PayPal</paymentMethod>
<autoPay>false</autoPay>
<location>London,United Kingdom</location>
<country>GB</country>
<shippingInfo>
<shippingServiceCost currencyId="GBP">1.1</shippingServiceCost>
<shippingType>Flat</shippingType>
<shipToLocations>GB</shipToLocations>
</shippingInfo>
<sellingStatus>
<currentPrice currencyId="GBP">0.5</currentPrice>
<convertedCurrentPrice currencyId="GBP">0.5</convertedCurrentPrice>
<bidCount>0</bidCount>
<sellingState>Active</sellingState>
<timeLeft>P0DT0H19M12S</timeLeft>
</sellingStatus>
<listingInfo>
<bestOfferEnabled>false</bestOfferEnabled>
<buyItNowAvailable>false</buyItNowAvailable>
<startTime>2016-08-18T07:52:34.000Z</startTime>
<endTime>2016-08-23T07:52:34.000Z</endTime>
<listingType>Auction</listingType>
<gift>false</gift>
</listingInfo>
<condition>
<conditionId>1000</conditionId>
<conditionDisplayName>New</conditionDisplayName>
</condition>
<isMultiVariationListing>false</isMultiVariationListing>
<topRatedListing>false</topRatedListing>
</item>
</searchResult>
<paginationOutput>...</paginationOutput>
<itemSearchURL>...</itemSearchURL>
</findItemsByCategoryResponse>
Normally there are 100 item nodes in this xml file, I just shorted the file. I tried to get the ''item'' nodes and everything inside in a XmlNodeList, but when I debug it says it contains 0 items. After this I want to retrieve some data, as you can see in the code. Note: I tried a lot of xpath values!
Here is the code I used:
XmlDocument xmlText = new XmlDocument();
xmlText.Load(basicUrl);
XmlElement root = xmlText.DocumentElement;
XmlNodeList xnList = root.SelectNodes("//item");
foreach(XmlNode item in xnList)
{
string title = item["title"].InnerText;
Console.WriteLine(title);
}

XPath Expressions are always namespace aware (if the Element has a Namespace then the XPath must reference it by namespace). Also, in XPath expressions, the 'default' namespace is always in the URI "". In your case you should do something like this :
XmlDocument xmlText = new XmlDocument();
xmlText.Load(yourXml);
XmlElement root = xmlText.DocumentElement;
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xmlText.NameTable);
nsmgr.AddNamespace("t", "http://www.ebay.com/marketplace/search/v1/services");
XmlNodeList xnList = xmlText.SelectNodes("//t:item", nsmgr);
foreach (XmlNode item in xnList)
{
string title = item["title"].InnerText;
Console.WriteLine(title);
}
SelectNodes with namespace :
https://msdn.microsoft.com/en-US/library/4bektfx9(v=vs.110).aspx

How to use XmlNamespaceManager and SelectSingleNode correctly?

I need to get node value from xml. The xml has namespace.
I have the following code
string xml =
"<file xmlns=\"SFAKT\" xmlns:xs=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">" +
"<document>test</document>" +
"</file>";
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.LoadXml(xml);
XmlNamespaceManager ns = new XmlNamespaceManager(xmlDocument.NameTable);
ns.AddNamespace("sf", "SFAKT");
XmlNode node = xmlDocument.SelectSingleNode("sf:file/document");
But node = null
Can you tell me where is the error in my code?

You need to use the overloaded SelectSingleNode method and pass in the XmlNamespaceManager. Also, you need the sf prefix for the document node.
Pull the node out like this:
XmlNode node = xmlDocument.SelectSingleNode("sf:file/sf:document", ns);

C#: Read XML Attribute

Using C#2.0 and VIsualStudio2005
I'm trying to access the "DisplayName" inside "MonitorResponseRecord"
from an XML file like the one Below:
<Magellan xsi:schemaLocation="http://tempuri.org/XMLSchema.xsd ..\Schema\Configuration.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://tempuri.org/XMLSchema.xsd">
<SchemaVersion>1.0</SchemaVersion>
<MonitorScope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" id="CleanStationChemicalManifoldFeed5" xmlns="http://tempuri.org/XMLSchema.xsd">
<PersonalSafety>
<MonitorResponseRecord Enabled="true" DisplayName="ChemicalManifoldFeed5ControllerFault">
<ExpressionMonitor>
<Expression>(ChemicalManifold.Feed5.DispenseValve = Open) and ((ChemicalManifold.Feed5.ViolatedRegion = HighProcess) or (ChemicalManifold.Feed5.ViolatedRegion = LowProcess) or (ChemicalManifold.Feed5.ViolatedRegion = Minimum))</Expression>
<TestInterval>0.1</TestInterval>
<MinimumTimeBetweenResponses>5</MinimumTimeBetweenResponses>
</ExpressionMonitor>
<Response>
<PostAlarm>
<AlarmName>ChemicalManifold_Feed5_ControllerFault</AlarmName>
<Parameter1 />
<Parameter2>Alarm Region = {ChemicalManifold.Feed5.ViolatedRegion}</Parameter2>
<Parameter3>{RecipeName}-{StepName}</Parameter3>
<Parameter4>FlowSetpoint = {ChemicalManifold.Feed5.Setpoint}-LPM, ActualFlow = {ChemicalManifold.Feed5.FlowMeter}-LPM</Parameter4>
</PostAlarm>
<ResponseEvent>
<TargetResource />
<Event>PA</Event>
<Reason>ChemicalSupply</Reason>
</ResponseEvent>
</Response>
</MonitorResponseRecord>
</PersonalSafety>
<PersonalSafety>
<MonitorResponseRecord Enabled="true" DisplayName = "PressureValveFailure">
...
...
...and soon
My current C# attempt is as follows, BUT it always hangs up when I try to XmlDocument.Load("");
XmlDocument doc = new XmlDocument();
doc.Load("../UMC0009.Configuration.Root.xml");
string attrVal = doc.SelectSingleNode("MonitorResponseRecord/#DisplayName").Value;
BUUUUT won't work :/ any help out there?
UPDATE:
the exception I recieve is as follows, and occures at the doc.Load("...") line:
{"Namespace Manager or XsltContext needed. This query has a prefix, variable, or user-defined function."} System.Exception {System.Xml.XPath.XPathException}

Your XPath query will be relative to the document root:
doc.SelectSingleNode("MonitorResponseRecord/#DisplayName")
To make it search anywhere in the doc prefix it with double slash:
doc.SelectSingleNode("//MonitorResponseRecord/#DisplayName")
If that still doesn't work I would try the above example after stripping out all those namespace declarations on the two root nodes.
Otherwise, with the namespace declarations you may find you need to define XML namespace mappings and use prefixes in your XPath like:
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("x", "http://tempuri.org/XMLSchema.xsd");
doc.SelectSingleNode("//x:MonitorResponseRecord/#DisplayName")

What about:
XmlDocument doc = new XmlDocument();
doc.Load("UMC0009.Configuration.Root.xml");
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("ns", "http://tempuri.org/XMLSchema.xsd");
string attrVal = doc.SelectSingleNode("//ns:MonitorResponseRecord/#DisplayName", nsmgr).Value;
Using a namespace manager, specify your namespace URI and use it in your XPath.
It works for me.

XPath doesn't work as desired in C#

My code doesn't return the node
XmlDocument xml = new XmlDocument();
xml.InnerXml = text;
XmlNode node_ = xml.SelectSingleNode(node);
return node_.InnerText; // node_ = null !
I'm pretty sure my XML and Xpath are correct.
My Xpath : /ItemLookupResponse/OperationRequest/RequestId
My XML :
<?xml version="1.0"?>
<ItemLookupResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2005-10-05">
<OperationRequest>
<RequestId>xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxxx</RequestId>
<!-- the rest of the xml is irrelevant -->
</OperationRequest>
</ItemLookupResponse>
The node my XPath returns is always null for some reason. Can someone help?

Your XPath is almost correct - it just doesn't take into account the default XML namespace on the root node!
<ItemLookupResponse
xmlns="http://webservices.amazon.com/AWSECommerceService/2005-10-05">
*** you need to respect this namespace ***
You need to take that into account and change your code like this:
XmlDocument xml = new XmlDocument();
xml.InnerXml = text;
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xml.NameTable);
nsmgr.AddNamespace("x", "http://webservices.amazon.com/AWSECommerceService/2005-10-05");
XmlNode node_ = xml.SelectSingleNode(node, nsmgr);
And then your XPath ought to be:
/x:ItemLookupResponse/x:OperationRequest/x:RequestId
Now, your node_.InnerText should definitely not be NULL anymore!

Sorry for the late reply but I had a similar problem just a moment ago.
if you REALLY want to ignore that namespace then just delete it from the string you use to initialise the XmlDocument
text=text.Replace(
"<ItemLookupResponse xmlns=\"http://webservices.amazon.com/AWSECommerceService/2005-10-05\">",
"<ItemLookupResponse>");
XmlDocument xml = new XmlDocument();
xml.InnerXml = text;
XmlNode node_ = xml.SelectSingleNode(node);
return node_.InnerText;