I am having a problem parsing xml that I receive from Web Service.
The xml looks very simple:
<Result xsi:schemaLocation="urn:yahoo:developer http://developer.yahooapis.com/TimeService/V1/GetTimeResponse.xsd" type="web"><Timestamp>1320677359</Timestamp></Result>
But when I try to parse it with following code I am getting no return results.
XDocument doc = XDocument.Load("http://developer.yahooapis.com/TimeService/V1/getTime?appid=StackSolution");
var datestamp = from ds in doc.Descendants("Result")
select new { currentstamp = ds.Element("Timestamp").Value };
Is there a solution or way to parse it?
Thanks you in advance
You have a couple issues: First, the Result node isn't a descendant. It's the root. Second, you ran into the most common issue when using LINQ to XML - you forgot the namespace. The following should give you what you need:
XElement doc = XElement.Load("http://developer.yahooapis.com/TimeService/V1/getTime?appid=StackSolution");
XNamespace ns = "urn:yahoo:developer";
var datestamp = from ds in doc.DescendantsAndSelf(ns + "Result")
select new { currentstamp = ds.Element(ns + "Timestamp").Value };
Note, this produces an IEnumerable. If you only want the datestamp, consider using FirstOrDefault instead. You may be able to make this simpler by just doing the following:
XElement doc = XElement.Load("http://developer.yahooapis.com/TimeService/V1/getTime?appid=StackSolution");
XNamespace ns = "urn:yahoo:developer";
var datestamp = doc.Element(ns + "Timestamp").Value;
This method avoids the namespace issue using LocalName (unqualified identifier).
var datestamp = doc.Root.Descendants().Where(c => c.Name.LocalName.Equals("Timestamp")).FirstOrDefault().FirstNode.ToString()
Related
i was reading huge xml file of 5GB size by using the following code, and i was success to get the first element Testid but failed to get another element TestMin coming under different namespace
this is the xml i am having
which i am getting as null
.What is wrong here?
EDIT
GMileys answer giving error like The ':' character, hexadecimal value 0x3A, cannot be included in a name
The element es:qRxLevMin is a child element of xn:attributes, but it looks like you are trying to select it as a child of xn:vsDataContainer, it is a grandchild of that element. You could try changing the following:
var dataqrxlevmin = from atts in pin.ElementsAfterSelf(xn + "VsDataContainer")
select new
{
qrxlevmin = (string)atts.Element(es + "qRxLevMin"),
};
To this:
var dataqrxlevmin = from atts in pin.Elements(string.Format("{0}VsDataContainer/{1}attributes", xn, es))
select new
{
qrxlevmin = (string)atts.Element(es + "qRxLevMin"),
};
Note: I changed your string concatenation to use string.Format for readability purposes, either is technically fine to use, but string.Format is a better approach.
What about this approach?
XDocument doc = XDocument.Load(path);
XName utranCellName = XName.Get("UtranCell", "un");
XName qRxLevMinName = XName.Get("qRxLevMin", "es");
var cells = doc.Descendants(utranCellName);
foreach (var cell in cells)
{
string qRxLevMin = cell.Descendants(qRxLevMinName).FirstOrDefault();
// Do something with the value
}
try this code which is very similar to your code but simpler.
using (XmlReader xr = XmlReader.Create(path))
{
xr.MoveToContent();
XNamespace un = xr.LookupNamespace("un");
XNamespace xn = xr.LookupNamespace("xn");
XNamespace es = xr.LookupNamespace("es");
while (!xr.EOF)
{
if(xr.LocalName != "UtranCell")
{
xr.ReadToFollowing("UtranCell", un.NamespaceName);
}
if(!xr.EOF)
{
XElement utranCell = (XElement)XElement.ReadFrom(xr);
}
}
}
actually namespace was the culprit,what i did is first loaded the small section i am getting from.Readform method in to xdocument,then i removed all the namespace,then i took the value .simple :)
I am having trouble returning data from a Linq to XML query.
I have the following XML
<sdnList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://tempuri.org/sdnList.xsd">
<publshInformation>
<Publish_Date>03/14/2013</Publish_Date>
<Record_Count>5440</Record_Count>
</publshInformation>
</sdnList>
I am trying to get the value of Publish Date using the following
XDocument xDoc = XDocument.Load(fileName);
XNamespace xNS = "http://tempuri.org/sdnList.xsd";
XNamespace xNS1 = "http://www.w3.org/2001/XMLSchema-instance";
string strCurrentDate = xDoc.Element(xNS1 + sdnList").Element("publshInformation").Element("Publish_Date").Value;
This just returns an object expected error.
I know my problem is around the namespaces (and most likely is will be a simple solutions)
Thanks
All the elements in that document are in the http://tempuri.org/sdnList.xsd namespace, so you need something like
xDoc.Element(xNS + "sdnList")
.Element(xNS + "publshInformation")
.Element(xNS + "Publish_Date").Value;
This will work:
XNamespace xNS = "http://tempuri.org/sdnList.xsd";
string strCurrentDate = xDoc.Element(xNS + "publshInformation").Element(xNS + "Publish_Date").Value;
I'm trying to extract the information from the namecheap sandbox api and can't figure out why my linq queries aren't working.
Here's a sample response.
XML
<ApiResponse Status="OK" xmlns="http://api.namecheap.com/xml.response">
<Errors />
<Warnings />
<RequestedCommand>namecheap.domains.check</RequestedCommand>
<CommandResponse>
<DomainCheckResult Domain="google.com" Available="false" />
</CommandResponse>
<Server>WEB1-SANDBOX1</Server>
<GMTTimeDifference>--4:00</GMTTimeDifference>
<ExecutionTime>0.875</ExecutionTime>
</ApiResponse>
C#
var doc = XDocument.Load(url);
var response = (
from r in doc.Root.Descendants("ApiResponse")
where 1==1
select new {
Errors = r.Element("Errors").Value,
Warnings = r.Element("Warnings").Value,
RequestedCommand = r.Element("RequestedCommand").Value,
CommandResponse = r.Element("CommandResponse").Value,
Server = r.Element("Server").Value
}
);
I've also tried this query with the same doc just to see if a simple example worked.
var test = doc.Descendants("RequestedCommand").First().Value;
But both return null. So where am I going wrong? I'll eventually need to get at the top level elements and the deeper elements within CommandResponse. Any help with that would also be appreciated.
UPDATE
As Jon's answer mentioned, it was mainly an issue with not using the namespace when referencing the various elements. Also used doc.Elements() rather then doc.Root. Descendants().
Here's an updated working version.
XNamespace ns = "http://api.namecheap.com/xml.response";
var response = (
from r in doc.Elements()
select new
{
Errors = r.Element(ns + "Errors").Value,
Warnings = r.Element(ns + "Warnings").Value,
RequestedCommand = r.Element(ns + "RequestedCommand").Value,
CommandResponse = r.Element(ns + "CommandResponse").Value,
Server = r.Element(ns + "Server").Value
}
);
The problem is that you're not using the namespace when you're looking for elements, descendants etc:
XNamespace ns = "http://api.namecheap.com/xml.response";
var doc = XDocument.Load(url);
var response = doc.Root
.Descendants(ns + "ApiResponse")
.Select(r => new {
Errors = r.Element(ns + "Errors").Value,
...
});
(Note that you never need where 1 == 1 in LINQ... I've changed this from query expression syntax as it wasn't giving you anything.)
The namespace is inherited from the <ApiResponse> element as the default namespace for all the other elements, as it's just xmlns=... rather than specifying an alias.
Also note that if you've shown us the whole XML document, then the above won't find any elements, as you're asking for ApiReponse elements below the root element, whereas it is the root element.
I just got Skeeted ;)
Here's something I did in linqpad to get you one of the elements in the XML
var myxml = #"<ApiResponse Status=""OK"" xmlns=""http://api.namecheap.com/xml.response"">
<Server>WEB1-SANDBOX1</Server>
<Errors />
<Warnings />
<RequestedCommand>namecheap.domains.check</RequestedCommand>
<CommandResponse>
<DomainCheckResult Domain=""google.com"" Available=""false"" />
</CommandResponse>
<GMTTimeDifference>--4:00</GMTTimeDifference>
<ExecutionTime>0.875</ExecutionTime>
</ApiResponse>";
//myxml.Dump();
XNamespace p = "http://api.namecheap.com/xml.response";
var doc1 = XElement.Parse(myxml);
var x = from n in doc1.Elements(p + "Server") select n;
x.First().Value.Dump();
I have the following XML:
<iq xmlns="jabber:client" to="39850777771287777738178727#guest.google.com/agsXMPP" xml:lang="en" id="sub23" from="search.google.com" type="result">
<pubsub xmlns="http://jabber.org/protocol/pubsub">
<subscription subscription="subscribed" subid="5077774B57777BD77770" node="search" jid="39850777771287777738178727#guest.google.com/agsXMPP" />
</pubsub>
</iq>
I've tried parsing with linq to sql, but it doesn't seem to understand that these are different nodes. It groups the whole iq into a single element.
Can anyone help in parsing this using XML?
The data I want to get is the subid="5077774B57777BD77770" and the id="sub23"
Thanks!
Edit:
Here's the code I have, tried doing it in two ways:
XDocument doc = XDocument.Parse("<xml>" + iq.ToString() + "</xml>");
var results = from feed in doc.Elements("xml")
select new
{
Id = (string)feed.Element("iq").Attribute("id"),
Subid = (string)feed.Element("iq").Element("pubsub").Element("subscription").Attribute("subid")
};
and
var doc = new System.Xml.XmlDocument();
doc.LoadXml(iq.ToString());
var searchId = doc.Attributes["id"];
var subid = doc.SelectSingleNode("/pubsub/subscription").Attributes["subid"];
As Dimitre pointed out, you have a namespace issue. This will work:
using System;
using System.Xml;
namespace XMLTest
{
class Program
{
static void Main(string[] args)
{
XmlDocument doc = new XmlDocument();
XmlNamespaceManager namespaces = new XmlNamespaceManager(doc.NameTable);
namespaces.AddNamespace("ns1", "jabber:client");
namespaces.AddNamespace("ns2", "http://jabber.org/protocol/pubsub");
doc.Load("xmltest.xml");
XmlNode iqNode = doc.SelectSingleNode("/ns1:iq", namespaces);
string ID = iqNode.Attributes["id"].Value;
Console.WriteLine(ID);
XmlNode subscriptionNode = doc.SelectSingleNode("/ns1:iq/ns2:pubsub/ns2:subscription", namespaces);
string subID = subscriptionNode.Attributes["subid"].Value;
Console.WriteLine(subID);
Console.ReadLine();
}
}
}
Read this for an explanation and a complete code example how to evaluate an XPath expression that contains location steps with nodes whose names are in a default namespace and are unprefixed in the XML document..
I'm not sure if this is what you're after, but it works:
XNamespace jabber = "jabber:client";
XNamespace pubsub = "http://jabber.org/protocol/pubsub";
string xmltext = "<iq xmlns=\"jabber:client\" to=\"39850777771287777738178727#guest.google.com/agsXMPP\" xml:lang=\"en\" id=\"sub23\" from=\"search.google.com\" type=\"result\">\n"
+ "<pubsub xmlns=\"http://jabber.org/protocol/pubsub\">\n"
+ "<subscription subscription=\"subscribed\" subid=\"5077774B57777BD77770\" node=\"search\" jid=\"39850777771287777738178727#guest.google.com/agsXMPP\" />\n"
+ "</pubsub>\n"
+ "</iq>";
XDocument xdoc = XDocument.Parse(xmltext);
var iqelem = xdoc.Element(jabber + "iq");
var id = iqelem.Attribute("id").Value;
var subselem = iqelem.Element(pubsub + "pubsub").Element(pubsub + "subscription");
var subid = subselem.Attribute("subid").Value;
Console.WriteLine("SubId = {0}\nId={1}", subid, id);
I concur with Dimitre - the "empty" xmlns namespace at the top is probably causing the problem. I sometimes strip these out with a regex if they're not used, otherwise play around with XmlNameSpaceManager as described
I get the followinng Xresponse after parsing the XML document:
<DIDL-Lite
xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/"
xmlns:dlna="urn:schemas-dlna-org:metadata-1-0/">
<item id="1182" parentID="40" restricted="1">
<title>Hot Issue</title>
</item>
As per the earlier thread, When there is a default namespace in the document, you must parse it as if it were a named namespace. For example.
XNamespace ns = "urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/";
var xDIDL = xResponse.Element(ns + "DIDL-Lite");
But in my case I have four different name space. I am not getting any results after using the following query , I am getting the response , Not Yeilding any results:
XNamespace dc = "http://purl.org/dc/elements/1.1/";
var vAudioData = from xAudioinfo in xResponse.Descendants(ns + "DIDL-lite").Elements("item")
select new RMSMedia
{
strAudioTitle = ((string)xAudioinfo.Element(dc + "title")).Trim(),
};
I have no clue whats going on as am new to it. Please help
This is because your item element is in your "ns" namespace. Use:-
XNamespace dc = "http://purl.org/dc/elements/1.1/";
XName didl = ns + "DIDL-lite";
XName item = ns + "item";
XName title = dc + "title";
var vAudioData = from xAudioinfo in xResponse.Descendants(didl).Elements(item)
select new RMSMedia
{
strAudioTitle = ((string)xAudioinfo.Element(title)).Trim(),
};
In these cases I tend to create myself a private class to hold the set of XNames I need to simplify the query code.
You are not getting any results because you are using the wrong namespace. All elements without prefix are in the namespace urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/.
Items in the namespace http://purl.org/dc/elements/1.1/ are prefixed with dc: in the xml document. The fragment does not show any items so it is hart to tell what elements you are looking for.
For example - given the following xml:
<DIDL-Lite
xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/"
xmlns:dlna="urn:schemas-dlna-org:metadata-1-0/">
<item id="1182" parentID="40" restricted="1">
<title>Hot Issue</title>
<dc:title>Purl Title</dc:title>
</item>
</DIDL-Lite>
And also given the assumption that you want to retrieve both titles the following code should yiedl the results you are looking for:
XNamespace dc= "http://purl.org/dc/elements/1.1/";
XNamespace ns = "urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/";
var result = xAudioinfo.Descendants(ns + "title"); // <title></title>
var result2 = xAudioinfo.Descendants(dc + "title"); // <dc:title></dc:title>