AJAX无刷新实现三级联动并获取DropDownList的值的方法
前台 要显示的（级联的页面） 
以上是前台要显示的页面，如果要接受值的 只要页面最下面的 隐藏域的值即可，相信你会在后台页面获取前台的值 实在不行你就把吟唱与换成Lable
1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AdvancedSearch.aspx.cs" 2 Inherits="SchoolCrm.Web.AdvancedSearch" MasterPageFile="~/FrontDeskShow.Master" 3 EnableEventValidation="false" %> 4 5 <%@ Register Assembly="SchoolCrm.Web" Namespace="SchoolCrm.Web.Contorls" TagPrefix="cc1" %> 6 <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> 7 <style type="text/css"> 8 #tablestyle 9 { 10 width: 100%; 11 border-style: solid; 12 } 13 #tdTitle 14 { 15 text-align: center; 16 background-color: #F0F7F9; 17 } 18 #tabletd 19 { 20 background-color: White; 21 border-bottom-width: 2px; 22 } 23 #ProfessionName 24 { 25 width: 134px; 26 } 27 </style> 28 29 <script type="text/javascript"> 30 31 //省市级联 --省份 32 $(function() { 33 34 $("#ctl00_Content_DropProvinceList1").focus(function() { 35 var text_val = $(this).val(); 36 if (text_val == this.defaultValue) { 37 $(this).val(""); 38 } 39 }).blur(function() { 40 var text_val = $(this).val(); 41 if (text_val == "") { 42 $(this).val(this.defaultValue); 43 } else { 44 var name = $(this).val(); 45 46 $.post("AjaxToprofessionaByWhere.aspx", { ProvinceNameId: encodeURI(name) }, function(data, success) { 47 if (success == "success") { 48 $("#ctl00_Content_DropCityList1").html(data); 49 } 50 }); 51 } 52 }); 53 }) 54 55 56 function getData() { 57 58 $("#ctl00_Content_SchoolHidden").val(str1); 59 //城市 60 var str1 = $("#ctl00_Content_DropCityList1 :selected").val(); 61 $("#ctl00_Content_CityHidden").val(str1); 62 63 } 64 65 </script> 66 67 </asp:Content> 68 <asp:Content ID="Content2" ContentPlaceHolderID="Content" runat="server"> 69 <div> 70 <table id="tablestyle" border="0" cellpadding="5" cellspacing="1" bgcolor="#B5D6E7"> 71 <tr> 72 <td id="tdTitle"> 73 所属地 74 </td> 75 <td id="tabletd"> 76 <asp:DropDownList ID="DropCountryList1" runat="server" Height="23px" Width="100px" 77 Enabled="False"> 78 </asp:DropDownList> 79 <cc1:DropProvinceList ID="DropProvinceList1" runat="server" Height="23px" Width="100px"> 80 <asp:ListItem Value="0">请选择</asp:ListItem> 81 </cc1:DropProvinceList> 82 <cc1:DropCityList ID="DropCityList1" runat="server" Height="23px" Width="100px"> 83 <asp:ListItem Value="0">请选择</asp:ListItem> 84 </cc1:DropCityList> 85 </td> 86 </tr> 87 <tr> 88 <td id="tdTitle"> 89 </td> 90 <td id="tabletd"> 91 <asp:Button ID="Search" runat="server" Text="搜索" OnClick="Search_Click" OnClientClick="return getData()" /> 92 93 <asp:Button ID="btnCancel" runat="server" Text="取消" OnClick="btnCancel_Click" /> 94 </td> 95 </tr> 96 </table> 97 </div> 98 <input type="hidden" id="profeeHidden" runat="server" /> 99 <input type="hidden" id="SchoolHidden" runat="server" /> 100 <input type="hidden" id="CityHidden" runat="server" /> 101 <input type="hidden" id="DergeeHidden" runat="server" /> 102 </asp:Content>
接受的页面,这个页面只是一个单独的页面只是接收值，传值使用------以上代码供大家 参考，如果不明白的，请留言，我会帮大家一一解决的！
1 using System; 2 using System.Collections; 3 using System.Configuration; 4 using System.Data; 5 using System.Linq; 6 using System.Web; 7 using System.Web.Security; 8 using System.Web.UI; 9 using System.Web.UI.HtmlControls; 10 using System.Web.UI.WebControls; 11 using System.Web.UI.WebControls.WebParts; 12 using System.Xml.Linq; 13 using System.Collections.Generic; 14 using System.Text; 15 using System.Web.Script.Serialization; 16 17 18 namespace SchoolCrm.Web 19 { 20 public partial class AjaxToprofessionaByWhere : System.Web.UI.Page 21 { 22 protected void Page_Load(object sender, EventArgs e) 23 { 24 if (!IsPostBack) 25 { 26 if (Request["ProvinceNameId"] != null) 27 { 28 ProvinceName(Request["ProvinceNameId"].ToString()); 29 } 30 } 31 } 32 33 BLL.Country country = new SchoolCrm.BLL.Country(); 34 BLL.Province province = new SchoolCrm.BLL.Province(); 35 BLL.City city = new SchoolCrm.BLL.City(); 36 37 /// <summary> 38 /// 省市级联 --省份 39 /// </summary> 40 /// <param name="ProfessionalName"></param> 41 private void ProvinceName(string ProvinceNameId) 42 { 43 string url = Server.UrlDecode(ProvinceNameId); 44 List<Model.City> list = city.SelectCityByProvinceIdAndCountryId("1", url); 45 // List<Model.Province> list = province.SelectProvinceByCountryId(url); 46 StringBuilder str = new StringBuilder(); 47 str.AppendFormat("<option value='{0}'>{1}</option>", 0, "请选择"); 48 foreach (Model.City item in list) 49 { 50 str.AppendFormat("<option value='{0}'>{1}</option>", item.CityId, item.ChineseName); 51 } 52 Response.Write(str.ToString()); 53 Response.End(); 54 55 56 57 } 58 59 } 60 }
