Send Dropdown selelection on one page to a dropdown on another

Hi Folks,
I've got a dropdownlist on my homepage and I want somone to select the one they want, and click a button to go to a form with the same drop down on but with more fields to fill in.
I've got this on my homepage for the button on click event:

        protected void lb_feedback_Click(object sender, EventArgs e)
    {
        StringBuilder url = new StringBuilder();
        url.Append("/feedback/feedback.aspx");
url.Append("?feedtype="); url.Append(Feedback_comment_type); Response.Redirect(url.ToString());
and this on my page
protected void Page_Load(object sender, EventArgs e)
    {
  Feedback_comment_type = Request["feedtype"];
  &nbs ...