其实，用的最多的算是省市联动了
直接上代码了
aspx页面：
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<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>省市联动</title> <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript" src="ajax.js"></script> <!--Ajax.Js文件--> <script type="text/javascript"> $(function () { //触发事件 $("#sProvince").change(function () { var code = $(this).val(); //Ajax $.post(ajax.getPath("GetCity"), { _code: code }, function (data) { var json = Tool.getJSON(data);//解析成Json $("#sCity").empty().append($("<option></option>").val("0").html("请选择")); for (var i = 0; i < json.length; i++) { $("#sCity").append($("<option></option").val(json[i].ID).html(json[i].Name)); }; }); }); }); function setSubbranchValue() { $("#hdProvince").val($("#sProvince").val()); $("#hdCity").val($("#sCity").val()); alert("省/直辖市ID："+ $("#hdProvince").val()+"城市ID："+ $("#hdCity").val()); }; </script> </head> <body> <form id="form1" runat="server"> <div> <!--隐藏域，方便后台调用--> <asp:HiddenField ID="hdProvince" runat="server" /> <asp:HiddenField ID="hdCity" runat="server" /> <select id="sProvince" onchange="Link.Change(this.options[this.selectedIndex].value);"> <%=_Province%> </select> <span></span> <select id="sCity" onchange="setSubbranchValue();"> <option value="0">请选择</option> <%=_City%> </select> </div> </form> </body> </html>
cs页面：其实没什么用途 只是进行初始化数据：
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protected StringBuilder _Province = new StringBuilder(); protected StringBuilder _City = new StringBuilder(); protected void Page_Load(object sender, EventArgs e) { _Province.AppendFormat("<option value=\"{0}\">{1}</option>", "1", "北京"); _Province.AppendFormat("<option value=\"{0}\">{1}</option>", "2", "上海"); _City.AppendFormat("<option value=\"{0}\">{1}</option>", "11", "朝阳区"); _City.AppendFormat("<option value=\"{0}\">{1}</option>", "12", "海淀区"); }
ashx页面：
便于方便没有调用数据库。直接用List进行的操作
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public void ProcessRequest(HttpContext context) { string action = context.Request.QueryString["action"]; switch (action) { case "Show": Show(); break; case "Login": Login(); break; case "GetCity"://联动调用该方法 GetCity();break; } } //城市类，便于测试 public class City { public string Name { get; set; } public int ID { get; set; } } protected static void GetCity() { List<City> lstCity; int code = Convert.ToInt32(HttpContext.Current.Request["_code"]); //进行数据库操作 //现在我们用List<>来代替 if (code == 1) { lstCity = new List<City>() { new City(){ID=11,Name="朝阳区"}, new City(){ID=12,Name="海淀区"} }; } else { lstCity = new List<City>() { new City(){ID=21,Name="黄浦区"}, new City(){ID=22,Name="徐汇区"} }; } WriteString(lstCity);//转化为Json格式 } /// <summary> /// 将列表转化为Json格式 /// </summary> /// <param name="lstCity"></param> public static void WriteString(List<City> lstCity) { StringBuilder Json = new StringBuilder(); Json.Append("["); if (lstCity.Count > 0) { for (int i = 0; i < lstCity.Count; i++) { Json.Append("{"); Json.AppendFormat("\"Name\":\"{0}\",", lstCity[i].Name); Json.AppendFormat("\"ID\":\"{0}\"", lstCity[i].ID); Json.Append("}"); if (i < lstCity.Count - 1) { Json.Append(","); } } } Json.Append("]"); HttpContext.Current.Response.ContentType = "text/plain"; HttpContext.Current.Response.Write(Json.ToString()); //HttpContext.Current.Response.Flush(); HttpContext.Current.Response.End(); ; }