Click here to Skip to main content
15,511,776 members
Articles / Web Development / ASP.NET
Posted 27 Jul 2009


13 bookmarked

LINQ to XML to retrieve an element value by its attribute

Rate me:
Please Sign up or sign in to vote.
5.00/5 (2 votes)
27 Jul 2009CPOL
Using LINQ to XML to retrieve an element value by its attribute.


This article tells us how to retrieve a value of an element depending on the attribute value.

The Scenario

I have a web site where I need to read some data as static but I want to be able to update it any time, so I decided to read it from an XML file and use LINQ to XML. After some time and a lot of searching here and there, I had a better understanding of the idea and so I decided to share it with every one.

Using the Code

We will make an XML file and a class to get the data from it:

  1. The XML file "Actions.xml":
  2. XML
    <?xml version="1.0" encoding="utf-8" ?>
    <Action id="SignIn">1</Action>
    <Action id="SignOut">2</Action>
    <Action id="Open">3</Action>
  3. The class "Actions.cs":
  4. We will make the class constructor the one which gets the data to our variables in the class.

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Xml.Linq;
    public class Actions
        int signIn, signOut, open;
        public int SignIn
            get { return signIn; }
        public Actions()
            XElement xe = XElement.Load(@"C:\Users\ADELOooO\Documents\
            Visual Studio 10\WebSites\LinQReadXML\Actions.xml");
            var x = from a in xe.Elements("Action")
              Where a.Attribute("id").Value == "SignIn"
              select a.Value;
            signIn = int.Parse(x.First().ToString());

    We have used the signin variable as an example above, but you can use it with them all.

  5. The code behind the webpage to call the method is shown here:
  6. C#
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    public partial class _Default : System.Web.UI.Page 
        protected void Page_Load(object sender, EventArgs e)
        protected void Button1_Click(object sender, EventArgs e)
            Actions a = new Actions();
            TextBox1.Text = a.SignIn.ToString();

Points of Interest

I used VSTS 10 beta to create this project. I hope that you find it helpful.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Written By
Software Developer (Senior)
Egypt Egypt
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

Comments and Discussions

GeneralMy vote of 5 Pin
heracles maroudas8-Jul-11 0:58
heracles maroudas8-Jul-11 0:58 
Generalhave a nested element f, seems Im wiriting the xmlDocument.Elements("StreetName") incorrect cant get a result Pin
69stephen29-Aug-10 5:13
69stephen29-Aug-10 5:13 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.