It is somewhat pointless to be posting this as there are many free RSS Readers out there that you can plug into your website but I have had a few messages come from this board as of late on how to do this so here goes.

Language: C# (Basic concept of XML and XSL are needed as well)
IDE: Visual Studio 2003
Difficulty: Beginner

Eventually what we want to be able to do is something like this:

pnlRSS.Controls.Add(gr.getRSS("[url of rss feed]", "[path/to/xsl/file]"))

The code that follows is for an application that sits behind a firewall so it utilizes WebRequest and WebResponse.

So create a new class.

public class RssReader
    {
           public label getRSS(string sXMLUrl, string sXSLUrl){
                System.Net.HttpWebRequest httpWebRequest = System.Net.HttpWebRequest.Create(sXMLUrl);
                System.Net.WebProxy oProxy = new System.Net.WebProxy("[proxy address]", [proxyport]);
                oProxy.Credentials = new System.Net.NetworkCredential("[proxyuser]", "[proxypassword]");
                httpWebRequest.Method = "GET";
                httpWebRequest.Proxy = oProxy;
                httpWebRequest.Accept = "text/xml";

                System.Net.HttpWebResponse httpWebResponse = httpWebRequest.GetResponse();
                System.IO.StreamReader streamReader = new System.IO.StreamReader(httpWebResponse.GetResponse Stream());
                string stringResult = streamReader.ReadToEnd();
                StringReader sr = new StringReader(stringResult);
                XmlDocument myXMLDoc = new XmlDocument();
                //if this application was not behind a firewall you
                //could bypass the above requests and do:
                //myXMLDoc.Load(sXMLUrl);
                //to retrieve the RSS Feed
                myXMLDoc.Load(sr);

                //We now have the raw XML loaded into an XMLDocument Object
                //Unforunately raw xml doesn't look to good so we need
                // to provide a style sheet so it looks a little bit
                //nicer.

               XslTransform myXSLDoc = new XslTransform();
               XmlResolver xmlRez;
               StringBuilder stringBuild = new StringBuilder();
               StringWriter stringWrit = new StringWriter(stringBuild);
               Label lbl = new Label();
               // Load the Style
               myXSLDoc.Load(sXSLUrl);
               // Transform our XML Doc
               myXSLDoc.Transform(myXMLDoc, null, stringWrit, xmlRez);
               //populate a labe with the transformed document
               //and return that label
               lbl.Text = stringBuild.ToString;
               return lbl;
           }
        }


So now we could do this:

RssReader gr = new RssReader();
pnlRSS.Controls.Add(gr.getRSS("[url of rss feed]", "[path/to/xsl/file]"))

and viola, a label with a transformed RSS Feed is placed on our website! Below is an example of what an XSL file looks like (more specifically this is the XSL file i use to transform CNN's RSS Feed)

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="html" />

  <xsl:template match="/">
  <table border="0" cellpadding="0" width="100%" cellspacing="1" bgcolor="#003366">
    <xsl:for-each select="rss/channel/item">
    <xsl:if test="position() &lt; 6">
    <tr>
      <td bgcolor="#ffffff"><a href="{link}" target="new"><strong><xsl:value-of select="title" /></strong></a><Br></Br>
       <span class="cnnFeed">
      <xsl:value-of disable-output-escaping="yes" select="description" />
      </span>

      </td>
     </tr>
     </xsl:if>
    </xsl:for-each>
    </table>
  </xsl:template>
</xsl:stylesheet>

What this does is grab the first 5 stories from the CNN feed and displays them in a table and then apply the style: cnnFeed which exists in a regular style sheet to the table cells.

Very straight forward isn't it? Let me know if you have any questions!

-------------------------
I will only tell you how to do it, not do it for you.
Unless, of course, you want to hire me to do work for you.

^^Thats my signature

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Doug Parsons
Wrox online library: Wrox Books 24 x 7
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