Develop Reference

How to get separate values from Xlement

This is a portion of XML I'm trying to parse
<BRTHDATES>
<BRTHDATE value="5/1/1963" code="B"/>
</BRTHDATES>
var birthdates = xmlDoc.XPathSelectElements("/INDV/PERSON/BRTHDATES").Elements().Where(e => e.Name == "BRTHDATE");
xe = birthdates.Elements().Where(e => e.Name == "BRTHDATE");
bbs = from b in birthdates
select new
{
Birthdays = b.FirstAttribute.Value,
Code = b?.Value
};
var status = birthdates.Elements().Where(e => e.Name.LocalName == "BRTHDATE").Single().Value;
When I try to get "Value" from the Element I get an empty string. I can't get anything for the "code" attribute.
It sure seems like this should be a lot easier...

You can try below code. I've already tested through a test project and got the require value.
string personBirthday = string.Empty;
string soapResult = #"<?xml version=""1.0"" encoding=""utf - 8"" ?><INDV> <PERSON> <BRTHDATES><BRTHDATE value = ""5/1/1963"" code = ""B"" /> </BRTHDATES></PERSON></INDV> ";
XmlDocument doc = new XmlDocument();
doc.Load(new StringReader(soapResult));
XmlNodeList person = doc.GetElementsByTagName("BRTHDATES");
if (person[0].ChildNodes.Count > 0)
{
foreach (XmlNode item in person[0].ChildNodes)
{
if (item.Name.Trim().Equals("BRTHDATE"))
{
personBirthday = !string.IsNullOrEmpty(item.Attributes[0].Value) ? item.Attributes[0].Value.Trim() : string.Empty;
}
}
}

Here is the solution
You can select specific Element from a Xml. Just try below sample code
XmlNodeList generalTabNodeList = xmlDocument.SelectNodes("/INDV/PERSON/BRTHDATES");
foreach (XmlNode node in generalTabNodeList)
{
if (node.ChildNodes.Count > 0)
{
string birthdate = !string.IsNullOrEmpty(node.ChildNodes[0].ToString()) ? node.ChildNodes[2].InnerText.ToString() : string.Empty;
}
}

I can't quite follow what you are trying to do, but, this should get you going:
For an XML file that looks like this:
<?xml version="1.0" encoding="utf-8" ?>
<INDV>
<PERSON>
<BRTHDATES>
<BRTHDATE value="5/1/1963" code="B"/>
</BRTHDATES>
</PERSON>
</INDV>
(Note, this is an entire XML document - one that matches your code, not just the snippet you provided (that doesn't match your code))
This code will pick out the value and code attributes:
using (var xmlStream = new FileStream("Test.xml", FileMode.Open))
{
XDocument xmlDocument = XDocument.Load(xmlStream);
var birthDateElements = xmlDocument.XPathSelectElements("/INDV/PERSON/BRTHDATES/BRTHDATE");
var birthDateElement = birthDateElements.FirstOrDefault();
if (birthDateElement != null)
{
var attributes = birthDateElement.Attributes();
var valueAttribute = attributes.Where(a => a.Name == "value");
var codeAttribute = attributes.Where(a => a.Name == "code");
}
}
You can play around with this code to figure out what you want to do. Whatever you do, don't pick out attributes by position, pick them out by name.

grab xml child of child element

i have successfully accessed itemId, galleryURL, title, viewItemURL value under item collections but problem is i need to access another value which is not directly under item collections it just inside another child. Please have a look on this picture of XML to get better idea. Please advice me how can i access listingInfo->watchCount
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 = "demo-key"; //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 items = new List<EbayDataViewModel>();
XDocument xdoc = XDocument.Load(Url);
// Since i am 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 imageurl = childElements.FirstOrDefault(x => x.Name.LocalName == "galleryURL");
var title = childElements.FirstOrDefault(x => x.Name.LocalName == "title");
var url = childElements.FirstOrDefault(x => x.Name.LocalName == "viewItemURL");
// var numberofwatch = childElements.Where(x => x.Name.LocalName == "listinginfo"); this is one step inside of another element
//add items from xml data to EbayDataViewModel object
items.Add(new EbayDataViewModel
{
ItemId = itemId == null ? String.Empty : itemId.Value,
EbayImageUrl = imageurl == null ? String.Empty : imageurl.Value,
EbayTitle = title == null ? String.Empty : title.Value,
EbayUrl = url == null ? String.Empty : url.Value,
//NumberOfWatch = numberofwatch == null ? String.Empty : numberofwatch.Value,
});
}
var e = Json(items);
return Json(items);
}else{
}
return null;
}

You can use XPathSelectElement (see MSDN XPathSelectElement)
string str =
#"<?xml version=""1.0""?>
<sri>
<item><listingInfo><watchCount>1</watchCount></listingInfo></item>
<item><listingInfo><watchCount>2</watchCount></listingInfo></item>
</sri>";
XDocument xdoc = XDocument.Parse(str);
var searchResultItems = xdoc.Descendants().Where(x => x.Name.LocalName == "item");
foreach (var item in searchResultItems)
{
var wc = item.XPathSelectElement("listingInfo/watchCount");
Console.WriteLine(wc.Value);
}

This line of code solves your problem i think
var nofwatch = childElements.FirstOrDefault(x => x.Name.LocalName ==
"listingInfo").Elements().FirstOrDefault(x => x.Name.LocalName ==
"watchCount");
foreach (var sri in searchResultItems)
{
// Get all child xml elements
var childElements = sri.Elements();
var itemId = childElements.FirstOrDefault(x => x.Name.LocalName == "itemId");
var imageurl = childElements.FirstOrDefault(x => x.Name.LocalName == "galleryURL");
var title = childElements.FirstOrDefault(x => x.Name.LocalName == "title");
var url = childElements.FirstOrDefault(x => x.Name.LocalName == "viewItemURL");
var nofwatch = childElements.FirstOrDefault(x => x.Name.LocalName == "listingInfo").Elements().FirstOrDefault(x => x.Name.LocalName == "watchCount");
//add items from xml data to EbayDataViewModel object
items.Add(new EbayDataViewModel
{
ItemId = itemId == null ? String.Empty : itemId.Value,
EbayImageUrl = imageurl == null ? String.Empty : imageurl.Value,
EbayTitle = title == null ? String.Empty : title.Value,
EbayUrl = url == null ? String.Empty : url.Value,
NumberOfWatch = nofwatch == null ? String.Empty : nofwatch.Value,
});
}

convert data of XML file to string lists C#

This is how the XML file could look:
<data>
<subdata>
<datatype id="1" name="data1">
<xdim>2</xdim>
<ydim>1</ydim>
</datatype>
<datatype id="2" name="data2">
<xdim>3</xdim>
<ydim>4</ydim>
</datatype>
</subdata>
</data>
Now, i want the following:
A list(string) with all datatype id's like "1" & "2" in the preview above
A list(string) with all the < xdim > stuff like "2" & "3" above
A list(string) with all the < ydim > stuff like "1" & "4" above
Are there easy methods built in in C# for stuff like this? Or could anyone help me with this question?
Jonas

You can use Descendents method.
This method reads all the child nodes even the nested ones where node name matches with specified string.
var Idstring = MyXml.Descendants("datatype").Select (x=>x.Attribute("Id")).ToList();
var xdimstring = MyXml.Descendants("xdim").Select (x=>x.Value).ToList();
var ydimstring = MyXml.Descendants("ydim").Select (x=>x.Value).ToList();
To Appease your curiosity :)
This how you can get nodes from specifically subdata node.
var Idstring = MyXml.Descendants("Subdata").Descendants("datatype").Select (x=>x.Attribute("Id")).ToList();
var xdimstring = MyXml.Descendants("Subdata").Descendants("xdim").Select (x=>x.Value).ToList();
var ydimstring = MyXml.Descendants("Subdata").Descendants("ydim").Select (x=>x.Value).ToList();
Now let say you have Multiple subdata and you want to read nodes only from first one...Simply use First linq extension method
var Idstring = MyXml.Descendants("Subdata").First().Descendants("datatype").Select (x=>x.Attribute("Id")).ToList();

This works and is fairly neat and simple:
string xml =
#"<data>
<subdata>
<datatype id=""1"" name=""data1"">
<xdim>2</xdim>
<ydim>1</ydim>
</datatype>
<datatype id=""2"" name=""data2"">
<xdim>3</xdim>
<ydim>4</ydim>
</datatype>
</subdata>
</data>";
var xelem = XElement.Parse(xml);
var allIDs = xelem
.Descendants()
.Where (x => x.Attribute("id") != null)
.Select (x => x.Attribute("id").Value)
.ToList();
var allXdims = xelem
.XPathSelectElements("//xdim")
.Select (x => x.Value)
.ToList();
var allYdims = xelem
.XPathSelectElements("//ydim")
.Select (x => x.Value)
.ToList();
Obviously the part at the start is just getting the XML into an XElement. You might want to do this with:
var xelem = XElement.Load(myXmlLocation);
instead.

The easiest way to convert classes to and from XML in C# is XML Serialization
For your example, you could create a class with member variables corresponding to the tags in your XML. When you want to create your XML file, you serialize the class to an XML File.
When your want to read back the information, you deserialize the contents of the XML file back to the class you created.
Here's a more comprehensive article: https://msdn.microsoft.com/en-us/library/58a18dwa(v=vs.110).aspx

You can use:
XDocument doc = XDocument.Load(#"..\myfile.xml");
to load your file in a XDocument object.
Then use XDocument methods to create string lists of the required id values:
var ids = (from a in doc.Descendants("subdata").Elements().Attributes("id")
select a.Value).ToList();
var xids = (from e in doc.Descendants("datatype").Elements("xdim")
select e.Value).ToList();
var yids = (from e in doc.Descendants("datatype").Elements("ydim")
select e.Value).ToList();

var xmlDocument = new XmlDocument();
xmlDocument.LoadXml(
"<data><subdata><datatype id=\"1\" name=\"data1\"><xdim>2</xdim><ydim>1</ydim></datatype><datatype id=\"2\" name=\"data2\"><xdim>3</xdim><ydim>4</ydim></datatype></subdata></data>");
var nodes = xmlDocument.SelectNodes("//datatype");
var first = new List<string>();
var Second = new List<string>();
var third = new List<string>();
foreach (XmlNode node in nodes)
{
first.Add(node.Attributes["id"].Value);
}
nodes = xmlDocument.SelectNodes("//xdim");
foreach (XmlNode node in nodes)
{
Second.Add(node.InnerText);
}
nodes = xmlDocument.SelectNodes("//ydim");
foreach (XmlNode node in nodes)
{
third.Add(node.InnerText);
}

Try something like this
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication81
{
class Program
{
static void Main(string[] args)
{
string xml =
"<data>" +
"<subdata>" +
"<datatype id=\"1\" name=\"data1\">" +
"<xdim>2</xdim>" +
"<ydim>1</ydim>" +
"</datatype>" +
"<datatype id=\"2\" name=\"data2\">" +
"<xdim>3</xdim>" +
"<ydim>4</ydim>" +
"</datatype>" +
"</subdata>" +
"</data>";
XElement data = XElement.Parse(xml);
var results = data.Descendants("subdata").Elements()
.GroupBy(x => x.Name.LocalName)
.Select(x => new
{
name = x.Key,
value = x.Select(y => (string)y).ToList(),
attributes = x.Attributes()
.Select(y => new {name = y.Name.LocalName, y.Value})
.GroupBy(y => y.name, z => z.Value)
.ToDictionary(y => y.Key, z => z.ToList())
}).ToList();
}
}
}

AngleSharp return span id

I'm trying to get a grip on AngleSharp by returning a specific part of an html.
So far that's my Code:
using (WebClient client = new WebClient())
{
string htmlCode = client.DownloadString("http://www.planetradio.de/music/trackfinder.html");
var parser = new HtmlParser();
var document = parser.Parse(htmlCode);
var blueListItemsLinq = document.All.Where(m => m.LocalName == "span id" && m.ClassList.Contains("headerTracklistCurrentSongArtist"));
foreach (var item in blueListItemsLinq)
label.Content = item;
}
What i want it to return is the current Artist which should be in the html under:
<div id="headerTracklistCurrentSong">
<span id="headerTracklistCurrentSongArtist">Olly Murs</span>
<span id="headerTracklistCurrentSongTitle">Kiss Me</span>
But i seem to have made a mistake....so i'd be glad if someone could help me here and explain it to me...
Thanks in advance to everyone answering. :)

The span elements are parsed as AngleSharp.Dom.Html.HtmlSpanElement
so your query should be:
var blueListItemsLinq = document.All.Where(m => m.LocalName == "span" && m.Id == "headerTracklistCurrentSongArtist");
Then you can get the text/values like this:
foreach (var item in blueListItemsLinq)
{
label.Content = item.TextContent; // "Olly Murs"
var child = item.FirstChild as AngleSharp.Dom.Html.IHtmlAnchorElement;
var text = child.Text; // "Olly Murs"
var path = child.PathName; // "/music/trackfinder.html"
}
UPDATED
Since the currnt Artist names are shown in the table at "planetradio.de/music/trackfinder.html", you can get the names like this:
var hitfinderTable = document.All.Where(m => m.Id == "hitfindertable").First() as AngleSharp.Dom.Html.IHtmlTableElement;
foreach (var row in hitfinderTable.Rows)
{
var artistName = row.Cells[2].TextContent;
}

parsing XML content - C#

I have not used XML for very long and need to extract the useful information from an XML response. If there are 2 tags that are the same but have a different name e.g
<lst name = "stack">
<str>Ola</str>
<lst name = "overflow">
<str>Hello</str>
</lst>
</lst>
How would I extract the contents of the tag with name="overflow"?

You can use LINQ To XML:
var result = XDocument.Parse(xml)
.Descendants("lst")
.Where(e => (string) e.Attribute("name") == "overflow")
.Descendants("str")
.Select(x => x.Value)
.FirstOrDefault();

Try this to start:
XPathDocument docNav = new XPathDocument(pathName);
XPathNavigator nav = docNav.CreateNavigator();
XmlNamespaceManager ns = new XmlNamespaceManager(nav.NameTable);
string val = nav.SelectSingleNode(#"/lst/lst[#name='overflow']/str")
These are good resources for simple XPath navigation and .NET XML Parsing:
http://www.w3schools.com/xpath/
http://www.codeproject.com/Articles/52079/Using-XPathNavigator-in-C

You may use the System.Xml.Linq namespace:
var xDoc = XDocument.Parse(xml);
var result = xDoc.Descendants()
.Where(d =>
d.Name == "lst" &&
d.Attributes("name").FirstOrDefault()!=null &&
d.Attributes("name").FirstOrDefault().Value == "overflow")
.FirstOrDefault();

User Linq to xml
var xmlFile = XDocument.Load(someFile);
var query = from item in xmlFile.Descendants("childobject")
where !String.IsNullOrEmpty(item.Attribute("using")
select new
{
AttributeValue = item.Attribute("using").Value
};

You can do it with LINQ to XML:
var doc = XDocument.Load("YourXMLPath.xml");
var content = doc
.Element("lst")
.Elements("lst")
.Where(e=>((string) e.Attribute("name") ?? "")=="overflow")
.Select(e=>e.Element("str").InnerText())
.FirstOrDefault();

LINQ to XML in System.Xml.Linq namespace.
const string xml = #"<lst name = ""stack""><str>Ola</str><lst name = ""overflow""><str>Hello</str></lst></lst>";
XDocument doc = XDocument.Parse(xml);
IEnumerable<XElement> overflow = doc.Root.Elements("lst").Where(x => (string) x.Attribute("name") == "overflow");
XElement firstOverflow = overflow.FirstOrDefault();
string value = firstOverflow.Descendants("str").FirstOrDefault(x => x.Value);