File upload in knockout js and MVC 4

Please see the three link

http://www.codeproject.com/Articles/387626/BikeInCity-2-KnockoutJS-JQuery-Google-Maps
http://c-snippets.com/Home/Details/243
https://github.com/filipw/WebApi.Html5.Upload/

          https://github.com/brianbruff/Expenses