If you are worrying on SEO, try Sandeep Mewara's solution.
if you are worrying about protection try protective methods.
One is here
Preventive Method for URL Request Forgery- An Example with ASP.NET MVC[
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Though it is in MVC you can use the logic in asp.
Apart from that you can pass parameters across pages using sessions, personalization and cross page posting. Choice is yours depends on the situation