DotNetStories
Linq to XML & ASP.Net - part 3
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