In the situation above, I don't get the exactly query string from Request.Params, and
some charactars were replaced with a character '?'. How can i solve this problem.
url like this: http://localhost/PM/ProductList.aspx?CFID=19&CFName=茶叶&Path=2,食品饮料;17,茶叶/茶饮料;19,茶叶;
But i can't explicit encode the url, because it will get a invalidate url.