using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class controls_cookies_CookieConcent : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Request.Params["__EVENTTARGET"] == upCookieConsent.UniqueID &&
            Request.Params["__EVENTARGUMENT"] == "userAgreed")
        {
            container.Visible = false;

            //store this info per user
            //perform a check based on that stored data to know whether to show this control at all
            //if the user already agreed you can simply set the Visible property to false
            //postbacks on this same page while the viewstate is retained will work fine, but you should implement
            //a long term storage as well
            //you may also want to look into showing this only for users that need to see it (e.g., based on IP location)
        }
    }

    protected override void Render(HtmlTextWriter writer)
    {
        if (container.Visible)
        {
            Page.ClientScript.RegisterForEventValidation(upCookieConsent.UniqueID, "userAgreed");
        }
        base.Render(writer);
    }
}