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How to get the Attribute name and the Elemnt value using XDocument

I am currently working on an ASP.NET Web Forms application and .NET 4.0. I don't have previous experience with XML in .NET. I created this very simple XML document from which I want to extract the attributes with their respective data :
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<DataTable>
<Filter>true</Filter>
<DropDown>true</DropDown>
</DataTable>
</configuration>
And I try this code:
var path = HttpContext.Current.Server.MapPath("/XML/Settings.xml");
XDocument xdoc = XDocument.Load(path);
IEnumerable<XElement> xnodes = xdoc.Root.Elements("DataTable");
List<string> list = new List<string>();
foreach (XElement xnn in xnodes)
{
list.Add(xnn.Value);
}
which results in in one element in my List with value truetrue. I know here I don't try to get both the attribute name and the content inside it, but in general that's what I wanna do, so how can I accomplish it?

There is no attribute here. I think you want a dictionary where keys are the element names and values are element values
var dictionary = xdoc.Root.Elements("DataTable").Elements()
.ToDictionary(x => x.Name.LocalName, x => (string)x)

You can get all elements as dictionary
var dictionary = xdoc.Descendants().
ToDictionary(x => x.Name.LocalName, x => x.Value)

had you tried using the XmlConvert.ToBoolean() function?
Also, I would have preferred to use Linq syntax when working with XML files.

How to delete certain root from xml file?

My '.xml' file looks this way:
<?xml version="1.0" encoding="utf-8"?>
<Requestes>
<Single_Request num="1">
<numRequest>1</numRequest>
<IDWork>1</IDWork>
<NumObject>1</NumObject>
<lvlPriority>Высокий</lvlPriority>
</Single_Request>
<Single_Request num="2">
<numRequest>2</numRequest>
<IDWork>2</IDWork>
<NumObject>2</NumObject>
<lvlPriority>Средний</lvlPriority>
</Single_Request>
<Periodic_Request num="1">
<numRequest>3</numRequest>
<IDWork>23</IDWork>
<pFrequency>23</pFrequency>
<lvlPriority>Низкий</lvlPriority>
<time_service>23</time_service>
<time_last_service>23</time_last_service>
<relative_time>23</relative_time>
</Periodic_Request>
</Requestes>
So I need to delete Single_Request with atribute value equal to sTxtBlock_numRequest.Text. I have tried to do it this way:
XDocument doc = XDocument.Load(FilePath);
IEnumerable<XElement> sRequest = doc.Root.Descendants("Single_Request").Where(
t => t.Attribute("num").Value =="sTxtBlock_numRequest.Text"); //I'm sure, that problem is here
sRequest.Remove();
doc.Save(FilePath);
Unfortunattly, nothing has happanned, don`t know how to solve the problem.
This is why , I am looking forward to your help.

You are comparing attribute value with string literal "sTxtBlock_numRequest.Text". You should pass value of textbox text instead:
doc.Root.Elements("Single_Request")
.Where(t => (string)t.Attribute("num") == sTxtBlock_numRequest.Text)
.Remove();
Note - it's better to use Elements when you are getting Single_Request elements of root, because Descendants will search whole tree, instead of looking at direct children only. Also you can call Remove() without saving query to local variable.

Simple XML parsing with LINQ

I would like to parse this XML :
<?xml version="1.0" encoding="Windows-1252" ?>
<TEST>Login inexistant</TEST>
I wrote this code
var result = from item in XElement.Parse(m_strRetour).Descendants("TEST")
select item;
return result.First().ToString();
m_strRetour is a string that contains my XML.
After execution, result is empty.
What am I doing wrong?

TEST seems to be your root node, so it can't be a Descendant.
To get the value out of it you could try this.
var xml = "<?xml version='1.0' encoding='Windows-1252' ?><TEST>Login inexistant</TEST>";
var result = XElement.Parse(xml);
var value = result.Value;

XElement.Parse will return the TEST element itself - which doesn't have any descendants. (Also, there's no benefit in using a query expression here. Whenever you write from x in y select x you should consider whether you couldn't just use y instead...)
You could parse it as an XDocument instead, in which case there would be a TEST descendant... or you could just use the XElement itself.
What are you really trying to achieve though? Does your real XML only have a single element?

XPath and attributes

I'm trying to traverse an XML document and select certain node attributes. The XML is dynamically generated.
<?xml version="1.0" encoding="ISO-8859-1"?>
<streams>
<stream>
<title>+23 (Panama)</title>
<info resolution="768x420" bitrate="1000kbps"/> ----- Need These
<swfUrl>http://www.freeetv.com/script/mediaplayer/player.swf</swfUrl>
<link>rtmp://200.75.216.156/live/</link>
<pageUrl>http://www.freeetv.com/</pageUrl>
<playpath>livestream</playpath>
<language>Music</language>
<advanced></advanced>
</stream>
</streams>
The code that I'm trying to use with zero luck and Visual Studio saying "No you're wrong. Try 600 more times" is
xDoc.Load("http://127.0.0.1/www/xml.php");
XmlNodeList nodes = xDoc.SelectNodes("/streams/stream");
foreach (XmlNode xn in nodes)
{
ListViewItem lvi = listView1.Items.Add(xn["title"].InnerText);
lvi.SubItems.Add(xn["swfUrl"].InnerText);
lvi.SubItems.Add(xn["link"].InnerText);
lvi.SubItems.Add(xn["pageUrl"].InnerText);
lvi.SubItems.Add(xn["playpath"].InnerText);
lvi.SubItems.Add(xn["language"].InnerText);
lvi.SubItems.Add(xn["advanced"].InnerText);
lvi.SubItems.Add(xn["//info/#resolution"].Value);
}
Please tell me oh wise ones what am I doing wrong?

If you want to select node's attribute using XPath you should use SelectSingleNode method, e.g.:
xn.SelectSingleNode("info/#resolution").Value

To select resolution attribute of your last node you need to use:
xn["info"].Attributes["resolution"].Value
Alternatively, you can try LINQ to XML for the same results (I find its API easier to use):
var doc = XDocument.Parse("http://127.0.0.1/www/xml.php");
foreach (var d in doc.Descendants("stream"))
{
ListViewItem lvi = listView1.Items.Add(d.Element("title").Value);
lvi.SubItems.Add(d.Element("swfUrl").Value);
// ...
vi.SubItems.Add(d.Element("info").Attribute("resolution").Value);
}

Here is an example of LINQ to XML to extract attributes from the entire document of a particular attribute name OR list of attribute names.
var xml = XElement.Parse("http://127.0.0.1/www/xml.php");
// find all attributes of a given name
var attributes = xml
.Descendants()
.Attributes("AttributeName")
// find all attributes of multiple names
var attributes = xml
.Descendants()
.Attributes()
.Where(a => ListOfAttribNames.Contains(a.Name.LocalName))

Replace:
lvi.SubItems.Add(xn["//info/#resolution"].Value);
with:
lvi.SubItems.Add(xn.SelectSingleNode("info/#resolution").Value);

How do I put XML into a List of Dictionaries with C# on Windows Phone 7

Here is the XML I have in a file:
SPECIAL NOTE:
This is a question for Windows Phone 7, not general C#
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
<item>
<date>01/01</date>
<word>aberrant</word>
<def>straying from the right or normal way</def>
</item>
<item>
<date>01/02</date>
<word>Zeitgeist</word>
<def>the spirit of the time.</def>
</item>
</rss>
I need it in a List (aka array) of Dictionary objects. Each Dictionary represents an <item>. Each element like <word> is the key with type string and each value like "Zeitgeist" is the value with type string.
Is there any easy way to do this? I'm coming from Objective-C and iOS so this is completely new to me with .NET and C#.

LINQ-to-XML makes it pretty easy. Here's a complete example:
public static void Main(string[] args)
{
string xml = #"
<rss version='2.0'>
<item>
<date>01/01</date>
<word>aberrant</word>
<def>straying from the right or normal way</def>
</item>
<item>
<date>01/02</date>
<word>Zeitgeist</word>
<def>the spirit of the time.</def>
</item>
</rss>";
var xdoc = XDocument.Parse(xml);
var result = xdoc.Root.Elements("item")
.Select(itemElem => itemElem.Elements().ToDictionary(e => e.Name.LocalName, e => e.Value))
.ToList();
}
Instead of loading from a string with XDocument.Parse(), you would probably do XDocument.Load(filename) but either way you get an XDocument object to work with (I did a string just for example).

You can use Linq-Xml to do this:
var doc = XDocument.Parse(xml); //xml is a String with your XML in it.
doc
.Root //Elements under the root element.
.Elements("item") //Select the elements called "item".
.Select( //Projecting each item element to something new.
item => //Selecting each element in the item.
item //And creating a new dictionary using the element name
.Elements() // as the key and element value as the value.
.ToDictionary(xe => xe.Name.LocalName, xe => xe.Value))
.ToList();

Yes, there is an easy way, it's called LINQ to XML.
Some resources:
Parsing complex XML with C#
LINQ to read XML
http://msdn.microsoft.com/en-us/library/bb387098.aspx
Hope this helps...