Tuesday, January 12, 2010

Read or consume RSS Feed in Asp.net 2.0/3.5

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In my first article i have explained "How you can create RSS feed using Asp.net". Here in this article i will explain how one can read or consume RSS Feed from Asp.net website. If you look at google reader then you will get a basic idea how one can Reading or Consuming RSS Feed from a RSS Feed link. I don't want to teach you the necessity of reading RSS in this article. So i want to start straight forward. Since in my first article i have created a RSS Feed so that open this project again and add another page and rename it to RSSFeedReader.aspx. In my local PC the RSS Feed link is: "http://localhost:50537/StudyProject/CreateRSS.aspx". Change it by copying the URL for CreateRSS.aspx page. Ok now everything is prepared to read or consume an RSS Feed from Asp.Net web application.

First add a server side table control in your RSSFeedReader.aspx page. So the complete HTML markup will be now:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="RSSFeedReader.aspx.cs" Inherits="RSSFeedReader" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>RSS Feed Reader</title>
    <form id="form1" runat="server">
 <table cellpadding="0" cellspacing="0">
 <table class="NormalText" runat="server" id="tbl_Feed_Reader" cellpadding="0" cellspacing="0">

The complete server side code is given below for Reading & Consuming RSS feed is like below:
using System;
using System.Data;
using System.Configuration;
using System.Web.UI.HtmlControls;
using System.Net;
using System.Xml;
using System.IO;

public partial class RSSFeedReader : System.Web.UI.Page
    protected void Page_Load(object sender, EventArgs e)
        WebRequest MyRssRequest = WebRequest.Create("http://localhost:50537/StudyProject/CreateRSS.aspx");
        WebResponse MyRssResponse = MyRssRequest.GetResponse();

        Stream MyRssStream = MyRssResponse.GetResponseStream();

        // Load previously created XML Document
        XmlDocument MyRssDocument = new XmlDocument();

        XmlNodeList MyRssList = MyRssDocument.SelectNodes("rss/channel/item");

        string sTitle = "";
        string sLink = "";
        string sDescription = "";

        // Iterate/Loop through RSS Feed items
        for (int i = 0; i < MyRssList.Count; i++)
            XmlNode MyRssDetail;

            MyRssDetail = MyRssList.Item(i).SelectSingleNode("title");
            if (MyRssDetail != null)
                sTitle = MyRssDetail.InnerText;
                sTitle = "";

            MyRssDetail = MyRssList.Item(i).SelectSingleNode("link");
            if (MyRssDetail != null)
                sLink = MyRssDetail.InnerText;
                sLink = "";

            MyRssDetail = MyRssList.Item(i).SelectSingleNode("description");
            if (MyRssDetail != null)
                sDescription = MyRssDetail.InnerText;
                sDescription = "";

            // Now generating HTML table rows and cells based on Title,Link & Description
            HtmlTableCell block = new HtmlTableCell();
            block.InnerHtml = "<span style='font-weight:bold'><a href='" + sLink + "' target='new'>"+ sTitle + "</a></span>";
            HtmlTableRow row = new HtmlTableRow();
            HtmlTableCell block_description = new HtmlTableCell();
            block_description.InnerHtml = "<p align='justify'>" + sDescription + "</p>";
            HtmlTableRow row2 = new HtmlTableRow();

And the Output will be look like this:

So, I hope now you can Make or Create an RSS Feed as well as can read or consume RSS feed using Asp.net. Happy programming.


Anonymous said...

Thanks for the Great Post

Dimitri De Vos said...

works like a charm. Thanks a lot and keep up the good work!

Lauraine said...

Thanks for the share. Keep posting such kind of information on your blog. I bookmarked it for future references.
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Foong said...

Yes, agreed! Worked like charm. Perfect! Thank you.

Anonymous said...

Works like charm! But, how would you consume the image associated with a consumed item, ie the image associated with a news story?

Anonymous said...

thank you very much

Anonymous said...

its very useful

Pranav Singh said...

it's not working...

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