从cookie获取值并存储在数据库中

I want to store the search url as a cookie in client side and write this url back to the database.The code below is not showing any errors but it is not writing the url string in database.I tested individually with writing url in database it works fine.Just its not working when i was trying to do from cookie.So please give me if you have any suggestions.I want to store the search url as a cookie in c