Asphelp: How To Show multiple Image in ul & li using database

  try
        {
            SqlConnection con = new SqlConnection(strcon);
            con.Open();
            SqlCommand cmd = new SqlCommand("select * from main_menu", con);
            SqlDataAdapter ad = new SqlDataAdapter(cmd);
            DataTable dt = new DataTable();
            ad.Fill(dt);
            if (dt.Rows.Count > 0)
            {
                foreach (DataRow dr in dt.Rows)
                {
                    content += "<li><a href='" + dr["menu_url"] + "?pid=" + dr["id"] + "'" + ">" + dr["menu_name"] + "</a></li>";
                }
                nav.InnerHtml = content;
            }
            con.Close();
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
        }