在GridView上的Repeat控件上找控件

  foreach(GridViewRow gr in gv.Rows)
            {
                foreach (RepeaterItem item in gr.FindControl("rp").Controls)
            {

                foreach (Control ct in item.Controls)
                {
                    if (ct.GetType().ToString() == "System.Web.UI.HtmlControls.HtmlInputRadioButton")
                    {
                        HtmlInputRadioButton rd = ct as HtmlInputRadioButton;
                        if (rd.Checked)
                        {
                            if (!htQP.ContainsKey(rd.Name))
                                htQP.Add(rd.Name, rd.Value);
                        }
                    }

                }
              }  
            }