how to convert a old asp website to wordpress?

Hello everyone, i’ve a small website(with few of pages– max 20) on asp running on windows server since last 3 years with a lot of traffic and all the pages are indexed and ranked high by google and other search engines, but now i decided to convert my existing asp website to wordpress on that same domain and host.i’ll request the godaddy to change my hosting server from windows to linux, and that i’ll install wordpress there and i’ll recreate all 20 pages there, but the matter is that i’ll lose my all traffic.is there anyway to redirect those asp indexed links to my new wordpress posts?
any kind of help will be appreciated– Thanks in advance ??