Develop Reference

Format and rewrite xml file

I have this xml file.
<?xml version="1.0" encoding="utf-8"?><test1 name="all">
<section name="Header"><holder name="top" >top</holder><holder name="banner">banner</holder></section>
</test1>
I want to format this file in a manage way like this(at least line break):
<?xml version="1.0" encoding="utf-8"?>
<test1 name="all">
<section name="Header">
<holder name="top" >top</holder>
<holder name="banner">banner</holder>
</section>
</test1>
in c#
XDocument xmlDoc = XDocument.Load("file.xml"); //load file
foreach(xml node ...) //Need help for this logic
{
//...Add line break ....
}

If you want to get file with formatted XML, then you just save xmlDoc.
XDocument xmlDoc = XDocument.Load("file.xml"); //load file
xmlDoc.Save("formatted.file.xml");
But it will be fully formatted (with indentations).

How to use LINQ to get data from an XML file?

I have xml files which look like this:
<?xml version="1.0" encoding="utf-8"?>
<record id="177" restricted="false">
<type>record type</type>
<startdate>2000-10-10</startdate>
<enddate>2014-02-01</enddate>
<titles>
<title xml:lang="en" type="main">Main title</title>
<!-- only one title element with type main -->
<title xml:lang="de" type="official">German title</title>
<!-- can have more titles of type official -->
</titles>
<description>description of the record</description>
<categories>
<category id="122">
<name>category name</name>
<description>category description</description>
</category>
<!-- can have more categories -->
</categories>
<tags>
<tag id="5434">
<name>tag name</name>
<description>tag description</description>
</tag>
<!-- can have more tags -->
</tags>
</record>
How do I select the data from these xml files using LINQ, or should I use something else?

You can load xml into XDocument objects using either the Load() method
for files, or the Parse() method for strings:
var doc = XDocument.Load("your-file.xml");
// OR
var doc = XDocument.Parse(yourXmlString);
Then you can access the data using LINQ:
var titles =
from title in doc.XPathSelectElements("//title")
where title.Attribute("type").Value == "official"
select title.Value;

Was searching for examples of Xmlserializer and found this: How to Deserialize XML document
So why not to try. I did Ctrl+C and Edit -> Paste Special -> Paste XML As Classes in Visual Studio 2013 and... Whoa I got all the classes generated. One condition target framework must be 4.5 and this function is available from Visual Studio 2012+ (as stated in that post)

Reading and Editing XML file

I have an XML file which contains employee details. How can i edit the existing employee names in that MXL file using C# .NET.
Here is the xml file.
<?xml version="1.0" encoding="utf-8"?>
<Employees>
<Employee id="1">
<Name>Employee 1</Name>
<Designation>SE </Designation>
<Qualification>MCA </Qualification>
</Employee>
<Employee id="2">
<Name>Employee 2</Name>
<Designation>SE </Designation>
<Qualification>MCA </Qualification>
</Employee>
<Employee id="3">
<Name>Employee 3</Name>
<Designation>SE </Designation>
<Qualification>MCA </Qualification>
</Employee>
</Employees>
How can i edit the employee names. I am new to xml. For example using Console Application

You can simple do that using Linq to Xml.
using System.Xml.Linq;
...
XDocument xDoc = XDocument.Load(#"Your xml file path goes here"); // or XDocument.Parse("Your xml string goes here");
xDoc.Root.Elements("Employee").First(xe => xe.Attribute("id").Value == "1").Element("Name").Value = "your value";
Here is a good reference for head start: Programming Guide (LINQ to XML)

you can use XML Serialization, in my opinion this is the most comfortable way
of working with c# and xml,
some examples are here:
http://msdn.microsoft.com/en-us/library/58a18dwa(v=vs.110).aspx

How to Split an XML file into multiple XML Files

I am trying to split a XML file to multiple small xml files in C#.net and am
trying to get the best possible approach to this. Any help on this will be
great... Sample example on what I am trying to do...
Source XML document
<?xml version="1.0" standalone="yes"?>
<DATABASE>
<DOC>
<DOCID>8510188</DOCID>
<ISSUE>2010</ISSUE>
<CAT>Literature and Art</CAT>
<TITLE>Test</TITLE>
<TEXT>Test</TEXT>
</DOC>
<DOC>
<DOCID>1510179</DOCID>
<ISSUE>2012</ISSUE>
<CAT>Miscellaneous</CAT>
<TITLE>Test</TITLE>
<TEXT>Test</TEXT>
</DOC>
</DATABASE>
Should split to two xml documents as below
1)
<?xml version="1.0" standalone="yes"?>
<DATABASE>
<DOC>
<DOCID>8510188</DOCID>
<ISSUE>2010</ISSUE>
<CAT>Literature and Art</CAT>
<TITLE>Test</TITLE>
<TEXT>Test</TEXT>
</DOC>
</DATABASE>
2)
<?xml version="1.0" standalone="yes"?>
<DATABASE>
<DOC>
<DOCID>1510179</DOCID>
<ISSUE>2012</ISSUE>
<CAT>Miscellaneous</CAT>
<TITLE>Test</TITLE>
<TEXT>Test</TEXT>
</DOC>
</DATABASE>

Well, I'd use LINQ to XML:
XDocument doc = XDocument.Load("test.xml");
var newDocs = doc.Descendants("DOC")
.Select(d => new XDocument(new XElement("DATABASE", d)));
foreach (var newDoc in newDocs)
{
newDoc.Save(/* work out filename here */);
}
(I'm assuming you want to save them. Maybe you don't need to. I've tested this just by printing them out to the console instead.)

Reading different XML with C#/DOM

I am currently using DOM to navigate xml in my C# project. However, some XML that i've come across lately is a bit different.
whereas usually I have:
<?xml version="1.0" encoding="UTF-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<entry>
<author>
<name>Me =)</name>
</author>
<content>
<somefield1>
<Subfield>subfield data</subfield>
</somefield>
</content>
</entry>
</feed>
and can navigate using foreach entry as entry, selectsinglenode(/content/somefield1/subfield), innertext to get the data from the subfield for each entry, the new XML looks like this:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<atom:feed xmlns:atom="http://www.w3.org/2005/Atom">
<atom:entry>
<atom:author>
<name>Me =)</name>
</atom:author>
<atom:content>
<somefield1>
<Subfield>subfield data</subfield>
</somefield>
</atom:content>
</atom:entry>
</atom:feed>
selectsinglenode(/atom:content/somefield1/subfield) is definitely not going to work...any suggestions?

atom: is just the namespace, and possibly you might just ignore it. If it still not works, you may have to use:
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("atom", "http://www.w3.org/2005/Atom");
selectsinglenode("atom:content/somefield1/subfield", nsmgr);
Which is documented here