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Check network connection to html page Silverlight

Posted on 2011-02-11
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Last Modified: 2012-05-11
I'm using the WebBrowser control in SL4 to stream a flash player from a html page on the local server.

This all works great, but sometimes the player pauses, if the 3rd party provider of the live feed performs a scheduled reboot. So, I somehow need to detect if the player is not streaming.

The only way I could think to do this si to monitor the network connection to the local server hmlt page, and change the source of the webbrowser if no data is being received.

Anyone know how I can do this?
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Question by:wint100
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by:Ted Bouskill
Ted Bouskill earned 500 total points
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Well technically there isn't a connection to the HTML page.  As soon as a browser receives a copy of a web page the connection is broken.  Client side JavaScript will poll a server at regular intervals to get partial updates without a full page round trip however, once again those connections are not permanent and only long enough to get the data for each transaction.  This design allows the web server to reuse sockets to service more clients.  Why keep a connection open when no data might be travelling back and forth?

Streaming players use UDP (different than the TCP in a web page) to stream the media.  UDP isn't a direct connection between two computers.  This is a quick and simple explanation: http://wiki.answers.com/Q/What_is_the_difference_between_TCP_and_UDP

I'd encourage you to read more by searching for more articles.

So, if the remote UDP server goes offline it's hard to tell because you don't have a direct connection.  The packets might simply be lost alone the way.

Generally you have to detect this issues with the player itself which would have a timeout to detect that no new content has arrived for a long time.
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by:wint100
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That's a great reply and very good info to know.

Excellent,Thanks.
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wint100 earned 0 total points
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I found that using a Javascript timer, I could check the status of the FlashPlayer, and fire the Start() method if it was Idle.

Thanks
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by:wint100
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Problem solved
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