This is the third post in a new series of posts regarding LINQ to XML and ASP.Net.Please do read the first post here. You can find the second article here .

I will use Visual Studio 2010 Ultimate edition and C# as the development language. Visual Studio 2010/2008 express editions will suffice.  

In this third post I will look at how to "Read an element with a specific attribute in an XML document using LINQ to XML".

1) Fire VS and create a web site. Choose an appropriate name for your site.

2) Add the existing students.xml file in your website.

3) In the code behind file Default.aspx.cs, add the namespace

using System.Xml.Linq;

All the classes we need to manipulate XML documents are inside this namespace.

In the Page_Load  event handling routine of the default.aspx.cs file, type the following

        XElement xelement = XElement.Load(@"C:\Users\fofo\Documents\

Visual Studio 2010\WebSites\forblog\xml\students.xml");
    
 
  var seminars = from seminar in xelement.Elements("Student")
  where (string)seminar.Element("Seminar").Attribute("Type") == "E-Learning" 
  select seminar;
 
            Response.Write("Students with seminars of type E-Learning: ");
            Response.Write("<br/>");
            foreach (XElement xEle in seminars)
            {   
                Response.Write(xEle.Element("Seminar").Value);
                Response.Write("<br/>");

4) In our LINQ to XML query we see that we access a specific attribute with this line of code. It is pretty straight-forward.

 where (string)seminar.Element("Seminar").Attribute("Type") == "E-Learning" 

5) Run your application and see in the browser the following results. 

Students with seminars of type E-Learning:  

Office 2010
ASP.Net
Silverlight
English

Email me if you need the source code. Hope its helps !!!!