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ASP.NET 3.5 Basics If you are new to ASP or ASP.NET programming with version 3.5, this is the forum to begin asking questions. Please also see the Visual Web Developer 2008 forum.
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Old January 11th, 2010, 05:57 PM
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Question ASP.NET XML Feed Error

I have an ASP.NET page that parses an external XML feed (please see example code below). It works...but when the feed goes down, it subsequently brings my site down. So I've created a default XML document that's located on my internal server a backup method when/if the external feed goes down. But I have no idea how to do this. If someone could let me know how to accomplish this, or point me in the right direction, that would be great. Thanks in advance.

ASP.NET XML FEED CODE

Code:
Dim intSWACounter As Integer = 0
        Dim swa_xmld As New XmlDocument() 'Create the XML Document
        Dim swa_nodelist As XmlNodeList
        Dim swa_node As XmlNode
        Dim objShowWeatherAlert As Object = False
        
        'Check for active severe weather alerts
        Try
            'Load the Xml file
            swa_xmld.Load("http://www.weather.gov/alerts-beta/wwaatmget.php?x=COC035") 'LIVE: Example feed
        Catch
            'What to do when it encounters an error
            swa_xmld.Load(MapPath("/mysite/docs/xml/weatheralert_down.xml")) 'DOWN
        Finally
            'Include code to run, no matter whether the code throws an exception or whether it runs successfully
            'Get the list of name nodes
            Dim xnm As New XmlNamespaceManager(swa_xmld.NameTable)
            xnm.AddNamespace("atom", "http://www.w3.org/2005/Atom")
            swa_nodelist = swa_xmld.SelectNodes("/rss/channel/item[title != 'There are no active watches, warnings or advisories in Colorado (Douglas/COC035)']", xnm) 'LIVE
        End Try
 


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