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How to show live internet content through rss on your web application

Here is sample of web application designed in asp.net vb code behind with ajax. which fetches live news content in english and hindi through rss feed and display on intranet. refreshes each 5 min using updatepanel
VB Code behind


Partial Class livenews
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
       

    End Sub
    Protected Sub Timer2_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer2.Tick
        loadLiveNews("http://news.google.com/news?cf=all&ned=hi_in&hl=hi&output=rss", gvln1)
        loadLiveNews("http://rss.news.yahoo.com/rss/india", gvln2)
        'lbError.Text = "in timer"
        Timer2.Enabled = True

    End Sub
    Private Sub loadLiveNews(ByVal url As String, ByVal gvLiveNews As GridView)
        XmlDataSource1.DataFile = url '"" 'vinservice.getDataSource
        gvLiveNews.DataSource = XmlDataSource1
        imgLoad2.Visible = False
        Try
            lbError.Visible = False
            gvLiveNews.DataBind()
        Catch ex As Exception
            gvLiveNews.Visible = False
            lbError.Visible = True
            lbError.Text = "Unable to get Live News Feed from internet. Service shall be restored shortly. Sorry for inconvenience."
        End Try
    End Sub
End Class

aspx page

              <%@ Page Language="VB" AutoEventWireup="false" CodeFile="livenews.aspx.vb" Inherits="livenews" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>

<!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></title>
   
</head>
<body>
    <form id="form1" runat="server">
   <div>
     <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
          
 </asp:ToolkitScriptManager>
        <br />
        <asp:XmlDataSource ID="XmlDataSource1" runat="server" 
            XPath="rss/channel/item" ></asp:XmlDataSource>
   
    </div>
    
    
    <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"  >
    <ContentTemplate>
         <asp:Label ID="lbError" runat="server" Text="Getting News Feed.. Please Wait for few seconds..." > <asp:Image  ID="imgLoad2" runat="server" ImageUrl="../images/loaderclock.gif"  /> </asp:Label>
      
         <asp:GridView ID="gvln1" runat="server" AutoGenerateColumns="False" 
            CellPadding="2" ForeColor="#333333"
            GridLines="None" Style="position: static" 
             EmptyDataText="No Users Online" Font-Size="9px" Width="698px" BorderColor="#3399FF" 
                      BorderStyle="Dotted" BorderWidth="1px" AllowPaging="true" 
             ShowHeader="False"  >
            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                <PagerSettings Visible="False" />
                <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
            <Columns>

          <asp:TemplateField  ShowHeader="False">
         
          <ItemTemplate>
                 <%#XPath("title")%><br />
                <%#XPath("pubDate")%><br />
                <%#XPath("author")%><br />
                <%#XPath("description")%> 
             </ItemTemplate>
              <HeaderStyle HorizontalAlign="Left" />
              <ItemStyle HorizontalAlign="Left" />
            </asp:TemplateField>  
            </Columns>
               
                <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                <EditRowStyle BackColor="#999999" />
                <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
            </asp:GridView>
            <asp:GridView ID="gvln2" runat="server" AutoGenerateColumns="False" 
            CellPadding="2" ForeColor="#333333"
            GridLines="None" Style="position: static" 
             EmptyDataText="No Users Online" Font-Size="9px" Width="695px" BorderColor="#3399FF" 
                      BorderStyle="Dotted" BorderWidth="1px" AllowPaging="true" 
             ShowHeader="False"  >
            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                <PagerSettings Visible="False" />
                <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
            <Columns>

          <asp:TemplateField  ShowHeader="False">
         
          <ItemTemplate>
                 <%#XPath("title")%><br />
                <%#XPath("pubDate")%><br />
                <%#XPath("author")%><br />
                <%#XPath("description")%> 
             </ItemTemplate>
              <HeaderStyle HorizontalAlign="Left" />
              <ItemStyle HorizontalAlign="Left" />
            </asp:TemplateField>  
            </Columns>
               
                <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                <EditRowStyle BackColor="#999999" />
                <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
            </asp:GridView>
        <asp:Timer ID="Timer2" runat="server" Interval="300000">
        </asp:Timer>
        </ContentTemplate>
        
        </asp:UpdatePanel>

       
    </form>
</body>
</html>


Above code assumes that your server has direct internet connection. If you have some proxy server for internet then only do following changes in web.config file

In web.config
add following lines 

<location path="loader/livenews.aspx">
    <system.net>
      <defaultProxy >
        <proxy
        proxyaddress="http://191.254.253.60:8080"
        bypassonlocal="True"
/>

      </defaultProxy>
    </system.net>
  </location>




Here is another simple asp.net application to get rss news data and display on a gridview. It also uses caching.

Private Function GetRSSFeed(ByVal link As StringByVal proxy As StringByVal gridViewControl As GridViewByVal cachename As StringAs String

       'called from timer
        Dim myxml As XmlDataSource = New XmlDataSource
        myxml = CType(Cache.Item(cachename), XmlDataSource)

        If IsNothing(myxml) Then
            lbError.Text = "if cache is null then fetch"
            myxml = New XmlDataSource  'myxml is null so reset it
            myxml.DataFile = link
            myxml.XPath = "rss/channel/item"

            Try
                Cache.Insert(cachename, myxml, Nothing, Now.AddMinutes(2), TimeSpan.Zero)
                'nameof ur cache, datasource, null , no of minutes or hours to survive, timespan
                gridViewControl.DataSource = myxml
                gridViewControl.DataBind()
                '  lbError.Visible = False
                Return "1"
            Catch ex As Exception
                'gvLiveNews.Visible = False
                Return "Unable to get Portion of Live News Feed from internet. Service shall be restored shortly."
            End Try
        Else
            lbError.Text = "Getting from cache"
            gridViewControl.DataSource = myxml
            gridViewControl.DataBind()
            Return "1"
        End If
    End Function

call this function from a timer and updatepanel to get asynchronus postback.

Protected Sub Timer2_Tick(ByVal sender As ObjectByVal e As System.EventArgsHandles Timer2.Tick

        '   loadLiveNews()
        GetRSSFeed("http://rss.accuweather.com/rss/liveweather_rss.asp?metric=1&locCode=ASI|IN|IN033|bhatwari""191.254.186.111:5678", gvTemp, "gvTemp")
        GetRSSFeed("http://www.bseindia.com/sensex/xml-data/sensexrss.xml""191.254.186.111:5678", gvBSE, "gvBSE")
        GetRSSFeed("http://rss.news.yahoo.com/rss/india""191.254.186.111:5678", gvLiveNews, "gvLiveNews")
        GetRSSFeed("http://news.google.com/news?cf=all&ned=hi_in&hl=hi&output=rss""191.254.253.60:8080", gvLiveNews2, "gvLiveNews2")
        Timer2.Enabled = False

    End Sub

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