read xml file using linq

read xml file using linq - c#

i have the following xml file
<?xml version="1.0" encoding="utf-8"?>
<Users>
<User>
<Name>John Smith</Name>
<test>
<Date>23.05.2011</Date>
<points>33</points>
</test>
<test>
<Date>22.06.2011</Date>
<points>29</points>
</test>
</User>
</Users>
and i would like to use linq to extract the dates and the points of the tests where username is "John Smith"..
how would i build my linq ?
i have done the following, but is not working as i wish :
XElement main = XElement.Load(#"users.xml");
string t = "John Smith";
var v = from user in main.Elements("User")
where t == users.Element("Name").Value
select users;
MessageBox.Show(v.First().Element("Date").Value.ToString());

I'm not sure what format you want the output to be, but this samples code should get the date and points. This projects the results into an anonymous type:
class Program
{
static void Main(string[] args)
{
XElement main = XElement.Load(#"users.xml");
var results = main.Descendants("User")
.Descendants("Name")
.Where(e => e.Value == "John Smith")
.Select(e => e.Parent)
.Descendants("test")
.Select(e => new { date = e.Descendants("Date").FirstOrDefault().Value, points = e.Descendants("points").FirstOrDefault().Value });
foreach (var result in results)
Console.WriteLine("{0}, {1}", result.date, result.points);
Console.ReadLine();
}
}
And the output is:
23.05.2011, 33
22.06.2011, 29

Try this out
class Program
{
static void Main(string[] args)
{
XElement main = XElement.Parse(
#"<Users>
<User>
<Name>John Smith</Name>
<test>
<Date>23.05.2011</Date>
<points>33</points>
</test>
<test>
<Date>22.06.2011</Date>
<points>29</points>
</test>
</User>
</Users>");
var users =
from m in main.Elements("User")
where (string)m.Element("Name") == "John Smith"
select (m.Descendants("test").Descendants("Date").FirstOrDefault().Value);
foreach (var user in users)
Console.WriteLine(user);
Console.ReadLine();
}
}
Regards

XDocument main = XDocument.Load(#"users.xml");
string t = "John Smith";
var v = from user in main.Descendants("User")
where t == user.Element("Name").Value
select user;
MessageBox.Show(v.First().Element("Date").Value.ToString());
should do the trick.

And about your other question to add another node to John Smith, this would be the solution:
class Program
{
static void Main(string[] args)
{
XElement main = XElement.Parse(
#"<Users>
<User>
<Name>Alex</Name>
<test>
<Date>08.05.2011</Date>
<points>4</points>
</test>
</User>
<User>
<Name>John Smith</Name>
<test>
<Date>23.05.2011</Date>
<points>33</points>
</test>
<test>
<Date>22.06.2011</Date>
<points>29</points>
</test>
</User>
</Users>");
var users =
from m in main.Elements("User")
where (string)m.Element("Name") == "John Smith"
select (m.Descendants("test").Descendants("Date").FirstOrDefault().Value);
XElement Mercury = main.Elements("User").Where(p => (String)p.Element("Name") == "John Smith").FirstOrDefault();
Mercury.Add(new XElement("test", new XElement("Date", "06.06.2011"), new XElement("points", "01")));
foreach (var user in main.Elements())
Console.WriteLine(user);
Console.ReadLine();
}
}
Giving the next expected result:
<User>
<Name>Alex</Name>
<test>
<Date>08.05.2011</Date>
<points>4</points>
</test>
</User>
<User>
<Name>John Smith</Name>
<test>
<Date>23.05.2011</Date>
<points>33</points>
</test>
<test>
<Date>22.06.2011</Date>
<points>29</points>
</test>
<test>
<Date>06.06.2011</Date>
<points>01</points>
</test>
</User>

Related

c# Merging two XMLs giving error

I am trying to merge two XMLs with same structure but different data into one.
I am getting this error: A node of type Document cannot be added to content.
Below is my code
var productElements =
testGroupProvider.GetTestGroup().ProductTests.Select(
productTest => new XElement(xNamespace + "Product",
new XElement(xNamespace + "ExternalId", productTest.ProductNameKey),
new XElement(xNamespace + "Name", testGroupProvider.GetProductName(productTest)),
new XElement(xNamespace + "ImageUrl", ChoiceBaseHostName + GetProductImageUrl(productTest, TargetDatabase))));
var root = new XDocument(
new XElement(xNamespace + "Feed",
new XAttribute("xmlns", xNamespace),
new XAttribute("name", BVFeedsName),
new XAttribute("incremental", "true"),
new XAttribute("extractDate", DateTime.Now.ToString("o")),
new XElement(xNamespace + "Categories",
new XElement(xNamespace + "Category",
new XElement(xNamespace + "ExternalId", testGroupProvider.GetProductGroup().Id),
new XElement(xNamespace + "Name", testGroupProvider.GetProductGroup().Name),
testGroupProvider.GetTestGroup().Name),
new XElement(xNamespace + "Products", productElements)));
var filePath = #"D:\testXML\test.xml";
XElement xml = XElement.Load(filePath);
xml.Add(root);
xml.Save(filePath);
Can anyone tell me what i am doing wrong.
This is the XML structure in test.xml
<?xml version="1.0" encoding="utf-8"?>
<Feed xmlns="http://www.bazaarvoice.com/xs/PRR/ProductFeed/5.6" name="Choice" incremental="true" extractDate="2016-07-12T15:24:44.5732750+10:00">
<Categories>
<Category>
<ExternalId>{09B3B4FB-F5CF-4522-BE96-4C4B535580C3}</ExternalId>
<Name>Cereal and muesli</Name>
</Category>
</Categories>
<Products>
<Product>
<ExternalId>coles-almond-hazelnut-macadamia-cluster-fusions</ExternalId>
<Name>Coles Almond, Hazelnut & Macadamia Cluster Fusions</Name>
<ImageUrl></ImageUrl>
</Product>
</Products>
</Feed>
The second XML has the same structure with different products
<?xml version="1.0" encoding="utf-8"?>
<Feed xmlns="http://www.bazaarvoice.com/xs/PRR/ProductFeed/5.6" name="Choice" incremental="true" extractDate="2016-07-12T15:24:44.5732750+10:00">
<Categories>
<Category>
<ExternalId>{12}</ExternalId>
<Name>cat1</Name>
</Category>
</Categories>
<Products>
<Product>
<ExternalId>Id</ExternalId>
<Name>Ccoles</Name>
<ImageUrl></ImageUrl>
</Product>
</Products>
</Feed>
I want to combine them like below
<?xml version="1.0" encoding="utf-8"?>
<Feed xmlns="http://www.bazaarvoice.com/xs/PRR/ProductFeed/5.6" name="Choice" incremental="true" extractDate="2016-07-12T15:24:44.5732750+10:00">
<Categories>
<Category>
<ExternalId>{09B3B4FB-F5CF-4522-BE96-4C4B535580C3}</ExternalId>
<Name>Cereal and muesli</Name>
</Category>
<Category>
<ExternalId>{12}</ExternalId>
<Name>cat1</Name>
</Category>
</Categories>
<Products>
<Product>
<ExternalId>coles-almond-hazelnut-macadamia-cluster-fusions</ExternalId>
<Name>Coles Almond, Hazelnut & Macadamia Cluster Fusions</Name>
<ImageUrl></ImageUrl>
</Product>
<Product>
<ExternalId>Id</ExternalId>
<Name>Ccoles</Name>
<ImageUrl></ImageUrl>
</Product>
</Products>
</Feed>

A xml document must have only one root.
Working with the documents you attached, you can replace the xml.Add(root); with the following (i.e. it will add each node under one root to the other xml root)
foreach (var child in root.Root.Elements())
{
xml.Element(child.Name.ToString()).Add(child.Nodes());
}
Edit - A further generalization
You can generalize the above code using a Merge extension of 2 XElements so that it reads as follows
foreach (var child in root.Elements())
{
xml.Element(child.Name.ToString()).Merge(child, xNamespace + "ExternalId");
}
Having defined the extension
public static void Merge(this XElement root1, XElement root2, XName element_id)
{
root1.Add(root2.Elements().Except(root1.Elements(), new MyComparer(element_id)));
}
with a xml comparer
public class MyComparer : IEqualityComparer<XElement>
{
private XName _element_id;
public MyComparer(XName element_id)
{
_element_id = element_id;
}
public bool Equals(XElement x, XElement y)
{
return x.Element(_element_id).Value.Equals(y.Element(_element_id).Value);
}
public int GetHashCode(XElement el)
{
return el.Element(_element_id).Value.GetHashCode();
}
}

Select correct nodes to add and correct nodes to be added.
var filePath = #"D:\testXML\test.xml";
XElement xml = XElement.Load(filePath);
var xmlCategories = xml.Descendants("Categories").First();
var rootCategories = root.Descendants("Category");
xmlCategories.Add(rootCategories);
var xmlProducts = xml.Descendants("Products").First();
var rootProducts = root.Descendants("Product");
xmlProducts.Add(rootProducts);
xml.Save(filePath);
Be crystal clear what you are doing.

Try this
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication2
{
class Program
{
const string FILENAME1 = #"c:\temp\test1.xml";
const string FILENAME2 = #"c:\temp\test2.xml";
static void Main(string[] args)
{
XDocument doc1 = XDocument.Load(FILENAME1);
XDocument doc2 = XDocument.Load(FILENAME2);
XElement category1 = doc1.Descendants().Where(x => x.Name.LocalName == "Categories").FirstOrDefault();
XElement category2 = doc2.Descendants().Where(x => x.Name.LocalName == "Categories").FirstOrDefault();
category1.Add(category2.Descendants());
XElement product1 = doc1.Descendants().Where(x => x.Name.LocalName == "Products").FirstOrDefault();
XElement product2 = doc2.Descendants().Where(x => x.Name.LocalName == "Products").FirstOrDefault();
product1.Add(product2.Descendants());
}
}
}

Try this, sorry about the VB
'second is The second XML has the same structure with different products
Dim combined As XElement = New XElement(test) 'create copy of test.xml
combined.<Categories>.LastOrDefault.Add(second.<Categories>.Elements)
combined.<Products>.LastOrDefault.Add(second.<Products>.Elements)
or
'if test can be used to combine then
test.<Categories>.LastOrDefault.Add(second.<Categories>.Elements)
test.<Products>.LastOrDefault.Add(second.<Products>.Elements)
The result is
<Feed name="Choice" incremental="true" extractDate="2016-07-12T15:24:44.5732750+10:00" xmlns="http://www.bazaarvoice.com/xs/PRR/ProductFeed/5.6">
<Categories>
<Category>
<ExternalId>{09B3B4FB-F5CF-4522-BE96-4C4B535580C3}</ExternalId>
<Name>Cereal and muesli</Name>
</Category>
<Category>
<ExternalId>{12}</ExternalId>
<Name>cat1</Name>
</Category>
</Categories>
<Products>
<Product>
<ExternalId>coles-almond-hazelnut-macadamia-cluster-fusions</ExternalId>
<Name>Coles Almond, Hazelnut & Macadamia Cluster Fusions</Name>
<ImageUrl></ImageUrl>
</Product>
<Product>
<ExternalId>Id</ExternalId>
<Name>Ccoles</Name>
<ImageUrl></ImageUrl>
</Product>
</Products>
</Feed>
The test data I used is
Dim test As XElement =
<Feed xmlns="http://www.bazaarvoice.com/xs/PRR/ProductFeed/5.6" name="Choice" incremental="true" extractDate="2016-07-12T15:24:44.5732750+10:00">
<Categories>
<Category>
<ExternalId>{09B3B4FB-F5CF-4522-BE96-4C4B535580C3}</ExternalId>
<Name>Cereal and muesli</Name>
</Category>
</Categories>
<Products>
<Product>
<ExternalId>coles-almond-hazelnut-macadamia-cluster-fusions</ExternalId>
<Name>Coles Almond, Hazelnut & Macadamia Cluster Fusions</Name>
<ImageUrl></ImageUrl>
</Product>
</Products>
</Feed>
Dim second As XElement =
<Feed xmlns="http://www.bazaarvoice.com/xs/PRR/ProductFeed/5.6" name="Choice" incremental="true" extractDate="2016-07-12T15:24:44.5732750+10:00">
<Categories>
<Category>
<ExternalId>{12}</ExternalId>
<Name>cat1</Name>
</Category>
</Categories>
<Products>
<Product>
<ExternalId>Id</ExternalId>
<Name>Ccoles</Name>
<ImageUrl></ImageUrl>
</Product>
</Products>
</Feed>
The XElements can be loaded like this
test = XElement.Load("PATH")
second = XElement.Load("second PATH")
and saved like this
test.Save("PATH")
second.Save("second PATH")
combined.Save("combined PATH")

Select in XML to a list

I just want to select the content of user list="default" or user list="otherListName" from a variable.
Like when my variable is equal to default I want to select the content of user list="default". By content I mean:
<list nom="Nom" description="Description" image="no_image.png"/>
And I want this content to be parse into a list
<list nom="" description="" image=""/>
<list nom="" description="" image=""/>
<?xml version="1.0" encoding="utf-8"?>
<database>
<user list="default">
<list nom="Nom" description="Description" image="no_image.png"/>
</user>
<user list="otherListName">
<list nom="" description="" image=""/>
<list nom="" description="" image=""/>
</user>
</database>`
I hope that my question is understandable.

You can use LINQ-to-XML, for example, assuming that doc is an XDocument variable containing the original XML :
var listName = "default";
var result = doc.Root
.Elements("user")
.Where(o => (string)o.Attribute("list") == listName)
.Elements("list");
See live demo in dotnetfiddle :
var raw = #"<?xml version='1.0' encoding='utf-8'?>
<database>
<user list='default'>
<list nom='Nom' description='Description' image='no_image.png'/>
</user>
<user list='otherListName'>
<list nom='' description='' image=''/>
<list nom='' description='' image=''/>
</user>
</database>";
var doc = XDocument.Parse(raw);
var listName = "default";
var result = doc.Root
.Elements("user")
.Where(o => (string)o.Attribute("list") == listName)
.Elements("list");
foreach(var r in result)
{
Console.WriteLine(r.ToString());
}
output : (for listName = "default")
<list nom="Nom" description="Description" image="no_image.png" />

Descendants not found even if they exist in XDocument in C#

I am having problems with getting descendant with specific name. I have hugh XML that basically is made of lots of this elements:
<?xml version="1.0" encoding="utf-8"?>
<Search_Results xmlns="https://support.bridgerinsight.lexisnexis.com/downloads/xsd/4.5/OutputFile.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://support.bridgerinsight.lexisnexis.com/downloads/xsd/4.5/OutputFile.xsd https://support.bridgerinsight.lexisnexis.com/downloads/xsd/4.5/OutputFile.xsd">
<Entity Record="28" ResultID="12460985">
<GeneralInfo>
<EntityType>Individual</EntityType>
<Name>Jón Jónsson</Name>
<DOB>01/01/0001</DOB>
<DOBParsed />
<AccountID>ABS-ASSOC-10-109</AccountID>
<IDLabel>Account ID</IDLabel>
<IDNumber>ABS-ASSOC-10-109</IDNumber>
<AddressType>Current</AddressType>
<PostalCode>Somalia</PostalCode>
</GeneralInfo>
<RecordDetailInfo>
<EntityType>Individual</EntityType>
<SearchDate>2016-05-13 09:53:50Z</SearchDate>
<Origin>Automatic Batch</Origin>
<FirstName>Jón</FirstName>
<LastName>Jónsson</LastName>
<FullName>Jón Jónsson</FullName>
<AdditionalInfo>
<Type>Date of Birth</Type>
<Information>01/01/0001</Information>
</AdditionalInfo>
<Addresses>
<Type>Current</Type>
<PostalCode>Somalia</PostalCode>
</Addresses>
<Identifications>
<Type>Account ID</Type>
<Number>ABS10-109</Number>
</Identifications>
</RecordDetailInfo>
<WatchList>
<Match ID="1">
<EntityName>Jonsson</EntityName>
<EntityScore>96</EntityScore>
<BestName>Jonsson, Jon Orn</BestName>
<BestNameScore>96</BestNameScore>
<FileName>WorldCompliance - Full.BDF</FileName>
<SourceDate>2016-05-11 05:01:00Z</SourceDate>
<DistributionDate>2016-05-12 14:59:39Z</DistributionDate>
<ResultDate>2016-05-13 09:53:50Z</ResultDate>
<EntityUniqueID>WX0003219444</EntityUniqueID>
<MatchDetails>
<Entity Type="2">
<Number>3219444</Number>
<Date>9/3/2012</Date>
<Reason>International</Reason>
<CheckSum>69185</CheckSum>
<Gender>Male</Gender>
<Name>
<First>Jon Orn</First>
<Last>Jonsson</Last>
<Full>Jon Orn Jonsson</Full>
</Name>
<Notes>Source.</Notes>
<Addresses>
<Address ID="1" Type="4">
<Country>Iceland</Country>
</Address>
</Addresses>
<IDs>
<ID ID="1" Type="27">
<Number>3219444</Number>
</ID>
</IDs>
<Descriptions>
<Description ID="1" Type="10">
<Value>Honorary Consul of Iceland in Saskatchewan, Canada</Value>
<Notes>Starting 2002 Ending 2014</Notes>
</Description>
<Description ID="2" Type="22">
<Value>Link to WorldCompliance Online Database</Value>
<Notes>Jonsson, Jon Orn | https://members.worldcompliance.com/metawatch2.aspx?id=e0399c29-7c5e-4674-874c-f36fdb19052e</Notes>
</Description>
<Description ID="3" Type="22">
<Value>Sources of Record Information</Value>
<Notes>http://brunnur.mfa.is/interpro/utanr/HBvefur.nsf/Pages/IslSendiradIsl?OpenDocument&amp | CountryNr=1(Canada)&amp | Lang=44') | http://www.international.gc.ca/protocol-protocole/assets/pdfs/Diplomatic_List.pdf | http://www.inlofna.org/Elfros/newsletter%20January%202010.pdf | http://publications.gc.ca/collections/Collection/E12-3-2002E.pdf | http://www.onlygolfnews.com/golf-canada-saskatchewan/saskatchewan-golf-first-fort-lacrosse-ted-brandon-over-new-last-snow.htm | http://www.ops.gov.sk.ca/Consular-Officers</Notes>
</Description>
</Descriptions>
</Entity>
</MatchDetails>
</Match>
</WatchList>
</Entity>
</Search_Results>
I am trying to reach all elements with name: Entity and later I want to go through all of them and get values from their descendants with name "Reason".
But non of the Entity elements is found with this line:
var entityList = xmlDoc.Descendants(nameSpace + "Entity").ToList();
This is a whole method I am using:
public static void GetIBANAndBicValuesFromXML(XDocument xmlDoc)
{
var reasons = new List<string>();
XNamespace nameSpace =
"https://support.bridgerinsight.lexisnexis.com/downloads/xsd/4.5/";
var entityList = xmlDoc.Descendants(nameSpace + "Entity").ToList();
if (entityList != null)
{
foreach (var reason in entityList.Select(entity => entity.Elements(nameSpace + "Reason"))
.Where(reasonsList => reasonsList != null).SelectMany(reasonsList => reasonsList))
{
string reasonValue = reason.Value;
reasons.Add(reasonValue);
}
}
}
And this is a call to this method:
private static void Main(string[] args)
{
var xmlFile = "C:\\temp\\indi2.xml";
var x = XDocument.Load("C:\\temp\\Individuals.xml");
XMLParse.GetIBANAndBicValuesFromXML(x);
}
I have tried namespace like this as well:
"https://support.bridgerinsight.lexisnexis.com/downloads/xsd/4.5/OutputFile.xsd"
But no success.
Anybody sees what I am doing wrongly?

You can use Linq to filter with LocalName:
string fileName = "1.txt";
var xDoc = XDocument.Load(fileName);
var neededElements = xDoc.Descendants().Where(x => x.Name.LocalName == "Entity");
Console.WriteLine("Found {0} Entitys", neededElements.Count());
foreach(var el in neededElements)
{
Console.WriteLine(el);
}

How can be this xml parsed in efficient way?

I am beginner in C#.
Simple Example of bigger case:
Input:
<?xml version="1.0" encoding="utf-8"?>
<products>
<product>
<id>1</id>
<name>John</name>
</product>
<product>
<id>2</id>
<name>Tom</name>
</product>
<product>
<id>3</id>
<name>Sam</name>
</product>
</products>
</xml>
Output(for id=1):
<id>2</id>
<name>Tom</name>
My part code try psedocode:
XDocument doc=XDocument.Parse(".............");
var els= doc.Descendants("product");
foreach(e in els){
node=e.Element("id");
if(2==node.Value){
return e;
}
}
Please help,
Thanks

Currently your xml file is not well-formatted - remove closing </xml> tag from your file to make it valid. And here is the query:
int id = 1;
XDocument xdoc = XDocument.Load(path_to_xml);
var product = xdoc.Descendants("product")
.Where(p => (int)p.Element("id") == id)
.SingleOrDefault();
This query will return whole <product> element or null if match not found.
Also I believe product name will be enough for you to select (because you already have product id):
var name = xdoc.Descendants("product")
.Where(p => (int)p.Element("id") == id)
.Select(p => (string)p.Element("name"))
.SingleOrDefault();
Returns Tom for id = 2

This will return the product (as in your question) not the id
var product = doc.XPathSelectElement("//product[id and id[text() = '1']]");

You might be looking for XPath:
root.XPathSelectElements(#"//products/product/id[text()='2']")
Edit To the comment: Directly getting the name: //products/product/id[text()='2']/../name
See full example
using System.Xml.Linq;
using System.Xml.XPath;
public class Program
{
public static void Main(string[] args)
{
var doc = XDocument.Parse(XML);
foreach(var n in doc.Root.XPathSelectElements(
#"//products/product/id[text()='2']"))
{
System.Console.WriteLine("Not that hard: '{0}'", n.Parent.Element("name").Value);
}
// Direct query for name:
foreach(var n in doc.Root.XPathSelectElements(
#"//products/product/id[text()='2']/../name"))
{
System.Console.WriteLine("Directly: '{0}'", n.Value);
}
}
private const string XML =
#"<?xml version=""1.0"" encoding=""utf-8""?>
<products>
<product>
<id>1</id>
<name>John</name>
</product>
<product>
<id>2</id>
<name>Tom</name>
</product>
<product>
<id>3</id>
<name>Sam</name>
</product>
</products>";
}
Printing:
Not that hard: 'Tom'
Directly: 'Tom'

insert node in xml file

i have a xml file that looks like the following, and i need to edit it in c# to insert a new node:
<?xml version="1.0" encoding="utf-8"?>
<Users>
<User>
<Name>John Smith</Name>
<test>
<Date>23.05.2011</Date>
<points>33</points>
</test>
<test>
<Date>22.06.2011</Date>
<points>29</points>
</test>
</User>
<User>
<Name>David Chris</Name>
<test>
<Date>01.02.2009</Date>
<points>25</points>
</test>
<test>
<Date>14.01.2010</Date>
<points>231</points>
</test>
</User>
i need to insert another "in this example a third" Element to the user called "John Smith" with all the sub elements..
so the xml will become :
<?xml version="1.0" encoding="utf-8"?>
<Users>
<User>
<Name>John Smith</Name>
<test>
<Date>23.05.2011</Date>
<points>33</points>
</test>
<test>
<Date>22.06.2011</Date>
<points>29</points>
</test>
<test>
<Date>30.10.2011</Date>
<points>21</points>
</test></b>
</User>
<User>
<Name>David Chris</Name>
<test>
<Date>01.02.2009</Date>
<points>25</points>
</test>
<test>
<Date>14.01.2010</Date>
<points>231</points>
</test>
</User>
any help is really appreciated ..
thanks a lot ..

Simple (assuming you're using .NET 3.5 or higher):
Load the document (e.g. using XDocument.Load)
Add the relevant element (create a new XElement, find the insertion point, call insertionPoint.Add(newElement))
Save the document (XDocument.Save)
LINQ to XML makes almost all XML-based tasks simpler than older APIs... if the above isn't a good enough start, I'd strongly recommend reading a tutorial on LINQ to XML.
There's no simple way of inserting the new element without reading the old file totally, manipulating it and then writing it out totally. In theory you could do it in a streaming fashion with XmlReader and XmlWriter, but they're almost always more trouble than they're worth.

class Program
{
static void Main()
{
var doc = XDocument.Load("test.xml");
var johnSmith = doc
.Descendants("User")
.Descendants("Name")
.Where(x => x.Value == "John Smith")
.Select(x => x.Parent)
.First();
johnSmith.Add(
new XElement("test",
new XElement("Date", "30.10.2011"),
new XElement("points", "21")
)
);
doc.Save("new.xml");
}
}

For .NET Framework 3.5 and higher: XDocument
For .NET Framework 1.1 and higher: XmlDocument

Here you go:
class Program
{
static void Main(string[] args)
{
XElement main = XElement.Load(#"users.xml");
// write new data to new file
string newDate = "01.01.2012";
string newPoints = "42";
main.Descendants("User")
.Descendants("Name")
.Where(e => e.Value == "John Smith")
.Select(e => e.Parent)
.First()
.Add(new XElement("test",
new XElement("date", newDate),
new XElement("points", newPoints)
)
);
main.Save("users2.xml");
}
}

We Keep Coding

C# (C-Sharp) is a programming language developed by Microsoft that runs on the .NET Framework.

read xml file using linq - c#

XDocument main = XDocument.Load(#"users.xml"); string t = "John Smith"; var v = from user in main.Descendants("User") where t == user.Element("Name").Value select user; MessageBox.Show(v.First().Element("Date").Value.ToString()); should do the trick.

Related

c# Merging two XMLs giving error

Select in XML to a list

Descendants not found even if they exist in XDocument in C#

How can be this xml parsed in efficient way?

insert node in xml file

Categories

Resources