Question : How do I retain the parameters in a URL ASP.NET / Visual Studio

I have this query string.

http://localhost:52392/wetsuits/searchResults.aspx?product=1

I want to retain the parameters so each time I click on a new navigation item, the query string builds up the parameters instead of change them.

eg.

click brand
http://localhost:52392/wetsuits/searchResults.aspx?product=1&brand=2

then click season
http://localhost:52392/wetsuits/searchResults.aspx?product=1&brand=2&season=1


I can do this......

 <a class="nav" href="<%# Request.Url %>&season=<%# Eval("id") %>"><asp:Label ID="seasonLabel" runat="server" Text='<%# Eval("season") %>' /></a>

but when the page gets posted back then if i click 'season' again I get two season in the URL.

i need some kind of IF on the page the says if the 'season' parameter is there then ignore it in the a href.....


help!

Answer : How do I retain the parameters in a URL ASP.NET / Visual Studio

if request.querystring("season") = ""