how to get Id(DataKey) from gridview

hi

this is Film table in database

 and bind gridview from this table and ordred by Preference Column I put Linknbutton in gridview that code is:

protected void LinkButton11_Click(object sender, EventArgs e)

    {
        GridViewRow row = (sender as LinkButton).NamingContainer as GridViewRow;
        int id = Convert.ToInt32(GridView2.DataKeys[row.RowIndex].Value);
        using (SqlConnection conn = General.GetConnection())
        {
            using (SqlCommand cmd = General.GetCommand("Filmserial_Info", conn))
            {
                cmd.Parameters.AddWithValue("@id", id);
                conn.Open();
                object daste = cmd.ExecuteScalar();
                conn.Close();


                if (daste.ToString()=="film")
                {
                    Response.Redirect("EditFilm.aspx? &id=" + id);
                }
                else
                {
                    Response.Redirect("CreateSerial.aspx?&Id=" + id);
                }

problem is in this line:

 int id = Convert.ToInt32(GridView2.DataKeys[row.RowIndex].Value);

I want when I click on linkbutton it use Id but here it use Preference data How I can define that according to Id column it go to

Response.Redirect("EditFilm.aspx? &id=" + id);

best regards

neda