how to play vedio file in asp.net

By using html5 you can simply add video file and play it in asp.net

Google is your friend: Be nice and visit him often. He can answer questions a lot more quickly than posting them here...

A very quick search using your subject as the search term gave over 5 million hits: https://www.google.co.uk/search?sugexp=chrome,mod=19&sourceid=chrome&ie=UTF-8&q=how+to+play+vedio+file+in+asp.net[^]

Included in this is the microsoft tutorial: Displaying Video in an ASP.NET Web Pages[^]
It may need some mods to work with your site, but...

In future, please try to do at least basic research yourself, and not waste your time or ours.