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XML response processing

I am getting raw XML response from eBay API call. Now I have to grab values from XML and add those values to ViewModel object then return data to my View. I have already tried few things bellow but I am unable to grab XML response items and assign to ViewModel. Please check each part of code below and let me know if you have any solution. I don't need working code coz i know you cant test it since its uncompleted. Just simple hints would enough, however, i am new with c#. Thanks a lot in advance
Controller:
public ActionResult Search(string OperationName, string calltype, string page, string keywords, string type, string location, string condition, string min, string max, string negative, string minFeedback, string maxFeedback, string drange, string categoryId)
{
string AppId = "KavinHim-BestProd-PRD-785446bf1-666"; //api configs
string BaseUrl = "http://svcs.ebay.com/services/search/FindingService/v1?OPERATION-NAME="; //base url api end point
if (calltype == "categoryClick")
{
string Url = BaseUrl + OperationName + "&SERVICE-VERSION=1.0.0&SECURITY-APPNAME=" + AppId + "&RESPONSE-DATA-FORMAT=XML&REST-PAYLOAD&categoryId=" + categoryId + "&paginationInput.entriesPerPage=2&paginationInput.pageNumber=" + page + "";
var client = new RestClient(Url);
var request = new RestRequest(Method.GET);
request.Method = Method.GET;
request.Parameters.Clear();
var xmlResponse = client.Execute(request).Content;
XmlDocument xdoc = new XmlDocument();
xdoc.LoadXml(new WebClient().DownloadString(xmlResponse));
var items = new List<EbayDataViewModel>();
foreach (var item in items)
{
//add items from xml data to EbayDataViewModel object
}
}
return View();
}
ViewModel:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using WebApplication2.Models;
namespace WebApplication2.ViewModels
{
public class EbayDataViewModel
{
public string EbayImageUrl { get; set; }
public string EbayTitle { get; set; }
public string NumberOfSales { get; set; }
public string NumberOfWatch { get; set; }
}
}
XML Response:
<?xml version="1.0" encoding="UTF-8"?>
-<findItemsByCategoryResponse xmlns="http://www.ebay.com/marketplace/search/v1/services">
<ack>Success</ack>
<version>1.13.0</version>
<timestamp>2017-10-14T08:27:04.876Z</timestamp>
-<searchResult count="2">
-<item>
<itemId>332390426668</itemId>
<title>حجاب روحاني يتحرك,حجاب الغزال أوالظبي ,أقوى حجاب للمحبة والزواج ,حرز حي يتفاعل </title>
<globalId>EBAY-US</globalId>
-<primaryCategory>
<categoryId>162918</categoryId>
<categoryName>Islamic</categoryName>
</primaryCategory>
<galleryURL>http://thumbs1.ebaystatic.com/m/mf7QDRtgSn83eQF23aLFD_Q/140.jpg</galleryURL>
<viewItemURL>http://www.ebay.com/itm/-/332390426668</viewItemURL>
<paymentMethod>PayPal</paymentMethod>
<autoPay>true</autoPay>
<postalCode>04468</postalCode>
<location>Old Town,ME,USA</location>
<country>US</country>
-<shippingInfo>
<shippingServiceCost currencyId="USD">0.0</shippingServiceCost>
<shippingType>FlatDomesticCalculatedInternational</shippingType>
<shipToLocations>Worldwide</shipToLocations>
<expeditedShipping>false</expeditedShipping>
<oneDayShippingAvailable>false</oneDayShippingAvailable>
<handlingTime>1</handlingTime>
</shippingInfo>
-<sellingStatus>
<currentPrice currencyId="USD">350.0</currentPrice>
<convertedCurrentPrice currencyId="USD">350.0</convertedCurrentPrice>
<sellingState>Active</sellingState>
<timeLeft>P10DT14H19M17S</timeLeft>
</sellingStatus>
-<listingInfo>
<bestOfferEnabled>true</bestOfferEnabled>
<buyItNowAvailable>false</buyItNowAvailable>
<startTime>2017-09-24T22:46:21.000Z</startTime>
<endTime>2017-10-24T22:46:21.000Z</endTime>
<listingType>StoreInventory</listingType>
<gift>false</gift>
<watchCount>6</watchCount>
</listingInfo>
<returnsAccepted>true</returnsAccepted>
<galleryPlusPictureURL>http://galleryplus.ebayimg.com/ws/web/332390426668_1_1_1.jpg</galleryPlusPictureURL>
<isMultiVariationListing>false</isMultiVariationListing>
<topRatedListing>false</topRatedListing>
</item>
-<item>
<itemId>382249935959</itemId>
<title>Circa 900 AD Authentic Viking Bronze Snake Bracelet Found In Latvia Excavation</title>
<globalId>EBAY-US</globalId>
-<primaryCategory>
<categoryId>162920</categoryId>
<categoryName>Viking</categoryName>
</primaryCategory>
<galleryURL>http://thumbs4.ebaystatic.com/m/mf73oCtiHN2GGSZlIY0VP7Q/140.jpg</galleryURL>
<viewItemURL>http://www.ebay.com/itm/Circa-900-AD-Authentic-Viking-Bronze-Snake-Bracelet-Found-Latvia-Excavation-/382249935959</viewItemURL>
<paymentMethod>PayPal</paymentMethod>
<autoPay>true</autoPay>
<postalCode>80932</postalCode>
<location>Colorado Springs,CO,USA</location>
<country>US</country>
-<shippingInfo>
<shippingServiceCost currencyId="USD">0.0</shippingServiceCost>
<shippingType>Free</shippingType>
<shipToLocations>Worldwide</shipToLocations>
<expeditedShipping>false</expeditedShipping>
<oneDayShippingAvailable>false</oneDayShippingAvailable>
<handlingTime>1</handlingTime>
</shippingInfo>
-<sellingStatus>
<currentPrice currencyId="USD">52.0</currentPrice>
<convertedCurrentPrice currencyId="USD">52.0</convertedCurrentPrice>
<sellingState>Active</sellingState>
<timeLeft>P28DT14H3M39S</timeLeft>
</sellingStatus>
-<listingInfo>
<bestOfferEnabled>false</bestOfferEnabled>
<buyItNowAvailable>false</buyItNowAvailable>
<startTime>2017-10-12T22:30:43.000Z</startTime>
<endTime>2017-11-11T22:30:43.000Z</endTime>
<listingType>FixedPrice</listingType>
<gift>false</gift>
<watchCount>1</watchCount>
</listingInfo>
<returnsAccepted>true</returnsAccepted>
<isMultiVariationListing>false</isMultiVariationListing>
<topRatedListing>true</topRatedListing>
</item>
</searchResult>
-<paginationOutput>
<pageNumber>1</pageNumber>
<entriesPerPage>2</entriesPerPage>
<totalPages>27113</totalPages>
<totalEntries>54226</totalEntries>
</paginationOutput>
<itemSearchURL>http://www.ebay.com/sch/37903/i.html?_ddo=1&_ipg=2&_pgn=1</itemSearchURL>
</findItemsByCategoryResponse>

If you're not using .NET Version 3.0 or lower, It's highly recommend to use XDocument over XmlDocument: reference link
Anyway, you can use .Descendants() to get all descendants, and then compare the local name of all its elements to see if there is an element whose local name matches the name of item.
(Tested)
var items = new List<EbayDataViewModel>();
// You can directly plug the url in with .Load() method.
// No need to create HttpClient to download the response as string and then
// parse.
XDocument xdoc = XDocument.Load(url);
// Since you're only interested in <item> collections within <searchResult>
var searchResultItems = xdoc.Descendants()
.Where(x => x.Name.LocalName == "item");
foreach (var sri in searchResultItems)
{
// Get all child xml elements
var childElements = sri.Elements();
var itemId = childElements.FirstOrDefault(x => x.Name.LocalName == "itemId");
var title = childElements.FirstOrDefault(x => x.Name.LocalName == "title");
//add items from xml data to EbayDataViewModel object
items.Add(new EbayDataViewModel {
EbayTitle = title == null? Stirng.Empty : title.Value,
...
});
}
return items;
Since there are lots of checking and comparison, writing extention methods for those would be useful.
public static class XElementExtensions
{
public static XElement LocalNameElement(this XElement parent, string localName)
{
return parent.Elements().FirstOrDefault(x => x.Name.LocalName == localName);
public static IEnumerable<XElement> LocalNameElements(this XElement parent, string localName)
{
return parent.Elements().Where(x => x.Name.LocalName == localName);
}
public static string LocalNameElementValue(this XElement parent, string localName)
{
var element = parent.LocalNameElement(localName);
return element == null? String.Empty : element.Value;
}
...
}

One way would be accessing the item node values from your XmlDocument using XPath query strings. You'll probably want to loop over the response items and create new ViewModel objects to populate your list of ViewModels:
var items = new List<EbayDataViewModel>();
var responseItems = xdoc.SelectNodes("item");
foreach (responseItem in responseItems)
{
items.Add(new EbayDataViewModel()
{ EbayImageUrl = responseItem.SelectSingleNode("galleryURL").InnerText,
EbayTitle = responseItem.SelectSingleNode("title").InnerText,
NumberOfSales = responseItem.SelectSingleNode("").InnerText,
NumberOfWatch = responseItem.SelectSingleNode("").InnerText
});
}
Note: I couldn't find anything that looked like "NumberOfSales or NumberOfWatch" in the XML Response, so those XPaths will need to be filled in.
See XmlDocument.SelectNodes for documentation on this method.

How can I use Linq to build a c# object from xml where an element has zero or more elements of the same type?

I'm trying to parse an xml file that looks roughly like this:
<?xml version="1.0" encoding="utf-16" ?>
<log>
<request id="1" result="Deny">
<user name="corp\joe"/>
<session number="1"/>
<file name="xyz"/>
<policy type="default" name="Default Rules" result="Deny"/>
<policy type="adgroup" name="Domain Users" result="Allow"/>
</request>
<request id="1" result="Deny">
<user name="corp\joe"/>
<session number="1"/>
<file name="abc"/>
<policy type="default" name="Default Rules" result="Deny"/>
<policy type="device" name="laptop12" result="Deny"/>
</request>
</log>
Note the presence of multiple policy elements per request.
Here's my code so far:
public class Request
{
public int Request_id { get; set; }
public string User_name { get; set; }
public string Session_number { get; set; }
public string File_name { get; set; }
}
void Main()
{
var xml = XDocument.Load(#"c:\temp\test.xml");
var query = from c in xml.Descendants("request")
where (String)c.Attribute("result") == "Deny"
select new Request() {
Request_id = (int) c.Attribute("id"),
User_name = (string) c.Element("user").Attribute("name"),
Session_number = (string) c.Element("session").Attribute("number"),
File_name = (string) c.Element("file").Attribute("name"),
};
foreach (Request r in query.ToList()) {
System.Diagnostics.Debug.WriteLine(r.User_name + "," + r.File_name);
}
}
I'm not sure how to query and capture the 0+ policy elements. Should I:
define a new class Policy {Type, Name, Result}
add a List member to the Request class
somehow populate this list when creating the new Request object as part of the Linq query
It's the somehow bit I'm stuck on. Do I need to add another Linq query within the existing Select, and if so, what would that look like? c.Descendents("policy")...

You're on the very good track! Your points are correct. You need a Policy class and a List<Policy> property in Request class. With that you need a subquery in your existing query to populate them:
var query = from c in xml.Descendants("request")
where (String)c.Attribute("result") == "Deny"
select new Request() {
Request_id = (int) c.Attribute("id"),
User_name = (string) c.Element("user").Attribute("name"),
Session_number = (string) c.Element("session").Attribute("number"),
File_name = (string) c.Element("file").Attribute("name"),
Policies = (from p in c.Elements("policy")
select new Policy() {
Type = (string) p.Attribute("type")
// (...)
}).ToList()
};

Querying XML file

i should to parse an XML file in my C# application.
This is a sample of my XML file
<?xml version="1.0" encoding="utf-8" ?>
<tokens>
<token id="1" >
<id>1</id>
<nome>"Pippo"</nome>
<numeroSillabe>"2"</numeroSillabe>
<sillabaIniziale>"Pip"</sillabaIniziale>
</token>
<token id="2">
<id>2</id>
<nome>Pluto</nome>
<numeroSillabe>2</numeroSillabe>
<sillabaIniziale>Plu</sillabaIniziale>
</token>
<token id="3">
<id>3</id>
<nome>Palla</nome>
<numeroSillabe>2</numeroSillabe>
<sillabaIniziale>Pa</sillabaIniziale>
</token>
</tokens>
For reading this file i use this code
XmlDocument document = new XMLDocument()
document.Load("Content\\Token.xml");
// arrivo al nodo
//XmlNode node = document.DocumentElement.SelectSingleNode("/tokens/token");
//dichiaro la mappa per i token
Dictionary<string, Token> mappa = new Dictionary<string, Token>();
foreach (XmlNode node in document.DocumentElement.ChildNodes)
{
//creo l'oggetto Token e lo popolo con i risultati del parse
Token token = new Token();
//compilo il campo ID
token.setId((node["id"].InnerText).Replace("\"", ""));
//compilo il nome
token.setNome((node["nome"].InnerText).Replace("\"", ""));
//compilo l numero sillabe
token.setNumeroSillabe((node["numeroSillabe"].InnerText).Replace("\"", ""));
//compilo la sillaba iniziale
token.setSillabaIniziale(node["sillabaIniziale"].InnerText);
//aggiungo all array il token
mappa.Add(token.getId(), token);
}
It works.
Now i would like to search the element from XML document for example SELECT * FROM DOCUMENT_XML WHERE numeroSilabe=2.
How can I perform this task?

If you need to navigate through your XML file, like in your code sample, you could go with something like this:
var mappa = document.SelectNodes("/tokens/token[numeroSillabe=2]") // Filter
.OfType<XmlElement>()
.ToDictionary(
t => t.GetAttribute("id"),
t => new
{
Id = t.GetAttribute("id"),
Nome = t.SelectSingleNode("nome" ).InnerText,
NumeroSillabe = t.SelectSingleNode("numeroSillabe" ).InnerText,
SillabaIniziale = t.SelectSingleNode("sillabaIniziale").InnerText
});

List<Token> tokens = mappa.Select(x=>x.Values.Where(y=>y.getNumeroSillabe()==2)).ToList();
I suppose that your token class has a method getNumeroSillabe() like getId(), which returns the value of NumeroSillabe.
By the way, I would suggest you to use automatic properties instead of defining foreach variable of your class a getter and a setter. Certainly, that would be suitable, if you don't have any logic in this methods instead of setting and getting the value of a variable, without checking anything or doing any calculation etc.
In your case:
// I don't know, which is the access modifier your class and I suppose that is public.
public class Token
{
public string Id { get; set;}
public string Nome { get; set;}
public string NumeroSillabe { get; set;}
public string SillabeIniziale { get; set;}
// here goes the methods of your class, if there are any
}
making this change, the code for the above linq query changes to the following:
List<Token> tokens = mappa.Select(x=>x.Values.Where(y=>y.NumeroSillabe==2)).ToList();
Also your code changes for instance as follows:
token.Nome = node["nome"].InnerText.Replace("\"", "");
The same holds for the other three assignments.
For further reading regrading the auto implemented properties, please look in the following link:
http://msdn.microsoft.com/en-us/library/vstudio/bb384054.aspx

use this:
var mappa = document.SelectNodes("//token[numeroSillabe=2]");

Try below code to get filtered nodes without any loop:
var document = new XmlDocument();
document.Load("Content\\Token.xml");
var filteredNodes = document.SelectNodes("tokens/token/numeroSillabe=2");

Parsing specific part of XML file

I have a .gpx XML file with the following sample:
<trk>
<name>Test</name>
<trkseg>
<trkpt lon="-84.89032996818423" lat="32.75810896418989">
<ele>225.0</ele>
<time>2011-04-02T11:57:48.000Z</time>
<extensions>
<gpxtpx:TrackPointExtension>
<gpxtpx:cad>0</gpxtpx:cad>
</gpxtpx:TrackPointExtension>
</extensions>
</trkpt>
</trkseg>
</trk>
I'm using Linq to XML to parse this but I'm having a difficult time parsing the extensions section. Here's the code I'm using:
var gpxDoc = LoadFromStream(document);
var gpx = GetGpxNameSpace();
var gpxtpx = XNamespace.Get("gpxtpx");
var tracks = from track in gpxDoc.Descendants(gpx + "trk")
select new
{
Name = DefaultStringValue(track, gpx, "name"),
Description = DefaultStringValue(track, gpx, "desc"),
Segments = (from trkSegment in track.Descendants(gpx + "trkseg")
select new
{
TrackSegment = trkSegment,
Points = (from trackpoint in trkSegment.Descendants(gpx + "trkpt")
select new
{
Lat = Double(trackpoint.Attribute("lat").Value),
Lng = Double(trackpoint.Attribute("lon").Value),
Ele = DefaultDoubleValue(trackpoint, gpx, "ele"),
Time = DefaultDateTimeValue(trackpoint, gpx, "time"),
Extensions = (
from ext in trackpoint.Descendants(gpx + "extensions").Descendants(gpxtpx + "TrackPointExtension")
select new
{
Cad = DefaultIntValue(ext, gpxtpx, "cad")
}).SingleOrDefault()
})
})
};
Here's the relevant helper code:
private static double? DefaultIntValue(XContainer element, XNamespace ns, string elementName)
{
var xElement = element.Element(ns + elementName);
return xElement != null ? Convert.ToInt32(xElement.Value) : (int?)null;
}
private XNamespace GetGpxNameSpace()
{
var gpx = XNamespace.Get("http://www.topografix.com/GPX/1/1");
return gpx;
}
The actual error I'm getting is
The following error occurred: Object reference not set to an instance of an object.
and it bombs on this code:
Extensions = (from ext in trackpoint.Descendants(gpx + "extensions").Descendants(gpxtpx + "TrackPointExtension")
select new
{
Cad = DefaultIntValue(ext, gpxtpx, "cad")
}).SingleOrDefault();
I just don't know how to fix it.

Since you never declare the namespace (xmlns:gpxtpx="http://www.topografix.com/GPX/1/1") it is never going to match. The xml fragment you provided is not well formed due to the lack of the namespace.
If the fragment posted is snipped from a larger document, consider switching to XML API's rather than string manipulation. If that is the entirety of the XML you receive from an outside system, add it to a root node which you can declare the schema in:
<root xmlns:gpxtpx="http://www.topografix.com/GPX/1/1">
<!-- put your xml fragment here -->
</root>

Select value in Xelement within Xelement?

For a Webradio app in windows Phone, i'm trying to read an XML file with the data, but i'm having a problem with a specific field. The XML File looks like this:
<brands xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<brandgroup>
<brand>
<code>blabla</code>
<name>blabla</name>
<logo>blabla</logo>
<websiteurl>blabla</websiteurl>
<audiostreams>
<audiostream streamurl="www.1.mp3" codec="mp3" streamrate="low"/>
<audiostream streamurl="www.2.mp3" codec="mp3" streamrate="med" default="true"/>
<audiostream streamurl="www.3.mp3" codec="mp3" streamrate="high"/>
</audiostreams>
</brand>
<brand>
</brand>
</brandgroup>
other 'brandgroups' with other 'brand'
</brand>
With the next Code i'm capable of getting the Name, Code, and Website into and object of Class Station for every brand inside every brandgroup.
XDocument loadedData = XDocument.Load("netten.xml");
var data = from query in loadedData.Descendants("brand")
select new Station
{
Name = (string)query.Element("name"),
Code = (int)query.Element("code"),
Website = (string)query.Element("websiteurl"),
};
However, I can't find a way to get the audiostream. There is the 'audiostreams' element wich has 3 child 'audiostream' elements, where i need the 'streamurl'.
Best would be to store the 3 streamurls so i could change the quality later on. Then i should need to have a field in Class Station:
String[] streamurls = {www.1.mp3, www.2.mp3, www.3.mp3};
and store the 3 streamurls in there to select later on. I've tried some things that are posted here related to XML, Attribute and XElement, but i can't get it to work.
Is there anyone out there that knows a way?
Btw I don't really get how to highlight code and stuff here, I hope it works, otherwse I'm really sorry...

If you really want just the URLs, you can do something like (assuming the is a property of type IEnumerable<string> (or string[]) called StreamUrls on Station):
from brand in loadedData.Descendants("brand")
select new Station
{
Name = (string)brand.Element("name"),
Code = (int)brand.Element("code"),
Website = (string)brand.Element("websiteurl"),
StreamUrls = brand.Element("audiostreams")
.Elements("audiostream")
.Attributes("streamurl")
.Select(a => a.Value)
.ToArray()
}
If you want to get other information from the audiostream elements, declare a class like:
class Stream
{
public string Url { get; set; }
public string Codec { get; set; }
public string Rate { get; set; }
public bool IsDefault { get; set; }
}
And the query would then look like:
from brand in loadedData.Descendants("brand")
select new Station
{
Name = (string)brand.Element("name"),
Code = (int)brand.Element("code"),
Website = (string)brand.Element("websiteurl"),
Streams =
(from stream in brand.Element("audiostreams").Elements("audiostream")
select new Stream
{
Url = (string)stream.Attribute("streamurl"),
Codec = (string)stream.Attribute("codec"),
Rate = (string)stream.Attribute("streamrate"),
IsDefault = (string)stream.Attribute("default") == "true"
}).ToArray()
}
(If Codec and Rate can only have certain values, expressing them as an enum would be better than string.)

Hope it is useful
static void Main(string[] args)
{
XDocument loadedData = XDocument.Load("netten.xml");
var data = from query in loadedData.Descendants("brand")
group query by new { A = query.Element("name"), B = query.Element("code"), C = query.Element("websiteurl"), D = query.Element("audiostreams") } into g
select new
{
Name = g.Key.A + "",
Code = g.Key.B + "",
Website = g.Key.C + "",
AudioStreams = g.Key.D.Elements("audiostream")
.Attributes("streamurl")
.Select(x => x.Value)
.ToArray()
};
foreach (var x in data)
{
Console.WriteLine(x.Name);
Console.WriteLine(x.Code);
Console.WriteLine(x.Website);
foreach (var url in x.AudioStreams)
Console.WriteLine(url);
}
Console.ReadKey();
}
}
The xml file:
<?xml version="1.0" encoding="utf-8" ?>
<brands xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<brandgroup>
<brand>
<code>blabla</code>
<name>blabla</name>
<logo>blabla</logo>
<websiteurl>blabla</websiteurl>
<audiostreams>
<audiostream streamurl="www.1.mp3" codec="mp3" streamrate="low"/>
<audiostream streamurl="www.2.mp3" codec="mp3" streamrate="med" default="true"/>
<audiostream streamurl="www.3.mp3" codec="mp3" streamrate="high"/>
</audiostreams>
</brand>
</brandgroup>
<brandgroup>
<brand>
<code>blabla2</code>
<name>blabla2</name>
<logo>blabla</logo>
<websiteurl>blabla2</websiteurl>
<audiostreams>
<audiostream streamurl="www.4.mp3" codec="mp3" streamrate="low"/>
<audiostream streamurl="www.5.mp3" codec="mp3" streamrate="med" default="true"/>
<audiostream streamurl="www.6.mp3" codec="mp3" streamrate="high"/>
</audiostreams>
</brand>
</brandgroup>
</brands>