DropDrowList動態綁定數據以及實現二級變動

1.DropDrowList動態綁定數據方法：

    1.1.在cs文件中查詢數據庫綁定數據

      部分參考代碼：

       BLL.tb_theme themeBll = new BLL.tb_theme();
            DataTable themeDt = themeBll.GetAllList().Tables[0];
            DDList_theme_id.Items.Clear();
            DDList_theme_id.Items.Add(new ListItem("請選擇主題", ""));
            for (int i = 0; i < themeDt.Rows.Count; i++)
            {
                DDList_theme_id.Items.Add(new ListItem(themeDt.Rows[i]["title"].ToString(), themeDt.Rows[i]["id"].ToString()));
            }

    1.2.利用jquery技術綁定數據

    部分參考代碼：

 function cityResult() {
            var statename = document.getElementById("ddlProvince").value;
            var cname = document.getElementById("txtCountry_en").value;
            //alert(cname+"-------"+statename);
            $.get("../tools/admin_ajax.ashx?action=get_citylist&cname=" + cname + "&statename=" + statename, function (data) {
                get_city_Result(data);
            });
        }

        function get_city_Result(response) {
            if (response != null) {
                var obj1 = eval(response);
                document.all("ddlCity").length = 0;
                document.all("ddlCity").options.add(new Option("--請選擇--", -1));
                for (var i = 0; i < obj1.length; i++) {
                    var name = obj1[i]["City Name"];
                    var id = obj1[i]["id"];
                    document.all("ddlCity").options.add(new Option(name, id));
                }
            }
        }

二者區別：

當綁定數據不需要總是更改的情況下使用第一種。

2.聯動綁定數據：

http://www.cnblogs.com/sc-xx/archive/2011/04/24/2026317.html

http://www.jb51.net/article/29595.htm