Creating Rss Feed

RSS

RSS Feed using ASP.NET & Linq

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RSS Feed RSS is a format for an XML document that describes a list of items, such as blog entries or news headlines.  The document may just be a stream of XML created on the fly rather than a static file. 

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RSS XML Markup    <description>       

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Creating an RSS Feed Add a generic handler named rsshandler.ashx  Add import directive Imports System.Xml.Linq  Replace the process request() subroutine as follows 

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Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest  Dim rssdoc As New XDocument(New XDeclaration("1.0", Nothing, Nothing))  rssdoc.Add(New XComment("My RSS Feed uses XML to Linq datasource"))  Dim rssrootelement As New XElement("rss", New RSS Document Comment XAttribute("version", "2.0"))  Dim rsschannel As New XElement("channel")  Dim rsstitle As New XElement("title", "RK's News Channel")  rsschannel.Add(rsstitle)  Dim rssdescRSS As Channel New XElement("description", Title (Appears at title bar) "Description of Channel")  rsschannel.Add(rssdesc)  Dim rsslink As New XElement("link", "http://www.livetolearn.in/")  rsschannel.Add(rsslink)  Dim intCtr As Integer RSS Title Link  Dim rssitem As XElement 

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For intCtr = 0 To 10 rssitem = New XElement("item", _  New XElement("title", "This is item number " & intCtr.ToString), _ 10 sample items with Description.  This for loop creates New XElement("description", "Description for item # " & _  intCtr.ToString), _  New XElement("link", "http://www.livetolearn.in/item" & _  intCtr.ToString & ".aspx"))  rsschannel.Add(rssitem) Next  rssrootelement.Add(rsschannel)  rssdoc.Add(rssrootelement)  rssdoc.Save((New System.IO.StreamWriter _  (context.Response.OutputStream))) End Sub 

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Now, browse the rsshandler.ashx with Internet Explorer 7 and above or Firefox

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Displaying RSS Feed Displaying XML data

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Add an XmlDataSource control to a ASP.NET page  Click smart tag  Choose configure data source  Enter the URL of the RSS feed For example http://www.livetolearn.in/blog/?feed=rss2  Type the following in Xpath expression text box Rss/channel/item  Add a data list control and set source to Xmldatasource1,  Edit Item template of data list control  Add a hyper link control inside the item template  Set it’s data binding property as follows Navigate URL – xPath(“link”)  xPath(“title”)  It displays the list of items from rss feed. 

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By adding more items in Item Template (e.g. Text box), we can display description from RSS feed.

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