Pass data to another page.

Hi. i have problem passing grid view data into next page where i will see my records displaying at each of the textboxes, dropdownlist etc.. when edit link is clicked. (can direct to next page but no data is there). Below is the codes for update code behind file.
 
 protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DataSet ds = new DataSet();
            string StaffID;

            if (Session["StaffID"] != null)
            {

                StaffID = (Session["StaffID"].ToStri ...