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Wednesday, 27 April 2016

Reading XML Document in C# Using Linq With Where Clause In Asp.Net

4/27/2016 - By Pranav Singh 0

This article will show you how you can read xml file using linq to C# with linq where clause in asp.net.
So for this article first we will create a new asp.net application and add an xml file.

<?xml version="1.0" encoding="utf-8" ?>
<countryName>
  <country>
    <id>1</id>
    <name>India</name>
  </country>
  <country>
    <id>2</id>
    <name>Nepal</name>
  </country>
  <country>
    <id>3</id>
    <name>Pakistan</name>
  </country>
  <country>
    <id>4</id>
    <name>Sri Lanka</name>
  </country>
</countryName>

After this we will add a new page and add the below code into the page.

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication3.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Reading XML Document in C# Using Linq With Where Clause In Asp.Net</title>
</head>
<body>
    <form id="form1" runat="server">
        <h3>Search For "India"</h3>
        <div>
            Id:
            <asp:Label ID="lblId" runat="server" Text="Label" style="font-weight: 700"></asp:Label><br />
            Name:<asp:Label ID="lblName" runat="server" Text="Label" style="font-weight: 700"></asp:Label>
        </div>
    </form>
</body>
</html>

Now check the .cs page code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml.Linq;

namespace WebApplication3
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        //reading xml document in c# using linq
        protected void Page_Load(object sender, EventArgs e)
        {
            XDocument xmldocument = XDocument.Load(Server.MapPath("XMLFile1.xml"));
            var countlryList = (from data in xmldocument.Descendants("country")
                                select new
                                {
                                    id = data.Element("id").Value,
                                    name = data.Element("name").Value
                                }).Where(m => m.id == "1");

            if (countlryList != null)
            {
                lblId.Text = countlryList.First().id;
                lblName.Text = countlryList.First().name;
            }
        }
    }
}

In above code I have read the xml and then applied filter to the collection for getting the specific record using linq.

Now we have done, run the application to check the output.


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