DropDownList 省市区无刷新三级联动

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Default.aspx页面代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" EnableEventValidation="false" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>51aspx省市区县（含完整数据库）无刷新联动</title></head><body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <div> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:DropDownList ID="ddlProvince" runat="server"> </asp:DropDownList><asp:DropDownList ID="ddlCity" runat="server"> </asp:DropDownList><asp:DropDownList ID="ddlVilliage" runat="server"> </asp:DropDownList><ajax:CascadingDropDown ID="CascadingDropDown2" runat="server" TargetControlID="ddlProvince" ServicePath="SNWebService.asmx" ServiceMethod="GetProvinceContents" Category="Province" PromptText="请选择省份" LoadingText="省份加载中..."> </ajax:CascadingDropDown> <ajax:CascadingDropDown ID="CascadingDropDown1" runat="server" ParentControlID="ddlProvince" ServicePath="SNWebService.asmx" ServiceMethod="GetCityContents" Category="City" TargetControlID="ddlCity" PromptText="请选择城市" LoadingText="城市加载中..."> </ajax:CascadingDropDown> <ajax:CascadingDropDown ID="CascadingDropDown3" runat="server" Category="Villiage" LoadingText="区县加载中..." ParentControlID="ddlCity" PromptText="请选择区县" ServiceMethod="GetViliageContents" ServicePath="SNWebService.asmx" TargetControlID="ddlVilliage"> </ajax:CascadingDropDown> </ContentTemplate> </asp:UpdatePanel> <br /> </div> </form></body></html>

SNWebService.cs（WebService类文件代码）

using System;using System.Web;using System.Collections;using System.Web.Services;using System.Web.Services.Protocols;using System.Web.Script.Services;using System.Collections.Generic;using System.Collections.Specialized;using AjaxControlToolkit;using System.Data.SqlClient;using System.Data;/// <summary>/// SNWebService 的摘要说明/// </summary>[WebService(Namespace = "http://tempuri.org/")][WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)][ScriptService]public class SNWebService : System.Web.Services.WebService{ public SNWebService() { //如果使用设计的组件，请取消注释以下行 //InitializeComponent(); } /// <summary> /// 获取省份数据 /// </summary> /// <param name="knownCategoryValues"></param> /// <param name="category"></param> /// <returns></returns> [WebMethod] public CascadingDropDownNameValue[] GetProvinceContents(string knownCategoryValues, string category) { List<CascadingDropDownNameValue> provinceList = new List<CascadingDropDownNameValue>(); string connectionString = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"]; SqlConnection sqlConn = new SqlConnection(connectionString); sqlConn.Open(); string strSql = "Select * From Province"; SqlCommand sqlCmd = new SqlCommand(strSql, sqlConn); SqlDataReader dtrProvince = sqlCmd.ExecuteReader(); while (dtrProvince.Read()) { provinceList.Add(new CascadingDropDownNameValue(dtrProvince["Name"].ToString(),dtrProvince["Code"].ToString())); } dtrProvince.Close(); sqlConn.Close(); return provinceList.ToArray(); } /// <summary> /// 获取市数据 /// </summary> /// <param name="knownCategoryValues"></param> /// <param name="category"></param> /// <returns></returns> [WebMethod] public CascadingDropDownNameValue[] GetCityContents(string knownCategoryValues, string category) { StringDictionary provinceList = CascadingDropDown.ParseKnownCategoryValuesString(knownCategoryValues); string connectionString = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"]; SqlConnection sqlConn = new SqlConnection(connectionString); sqlConn.Open(); string strSql = "Select * From city Where ProvinceId='" + provinceList["Province"] + "'"; SqlCommand sqlCmd = new SqlCommand(strSql, sqlConn); SqlDataReader dtrCity = sqlCmd.ExecuteReader(); List<CascadingDropDownNameValue> cityList = new List<CascadingDropDownNameValue>(); while (dtrCity.Read()) { cityList.Add(new CascadingDropDownNameValue(dtrCity["Name"].ToString(), dtrCity["code"].ToString())); } dtrCity.Close(); return cityList.ToArray(); } /// <summary> /// 获取乡镇数据 /// </summary> /// <param name="knownCategoryValues"></param> /// <param name="category"></param> /// <returns></returns> [WebMethod] public CascadingDropDownNameValue[] GetViliageContents(string knownCategoryValues, string category) { StringDictionary cityList = CascadingDropDown.ParseKnownCategoryValuesString(knownCategoryValues); string connectionString = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"]; SqlConnection sqlConn = new SqlConnection(connectionString); sqlConn.Open(); string strSql = "Select * From area Where CityId='" + cityList["City"] + "'"; SqlCommand sqlCmd = new SqlCommand(strSql, sqlConn); SqlDataReader dtrViliage = sqlCmd.ExecuteReader(); List<CascadingDropDownNameValue> viliageList = new List<CascadingDropDownNameValue>(); while (dtrViliage.Read()) { viliageList.Add(new CascadingDropDownNameValue(dtrViliage["Name"].ToString(), dtrViliage["id"].ToString())); } dtrViliage.Close(); return viliageList.ToArray(); } }

Web.Cofig

<?xml version="1.0"?><configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0"><configSections><sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"><sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"><section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/><sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"><section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="Everywhere"/><section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/><section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/></sectionGroup></sectionGroup></sectionGroup></configSections><appSettings><add key="ConnectionString" value="Data Source=(local);Initial Catalog=my51aspx;User ID=sa;Password=sa;"/></appSettings><system.web><authentication mode="Forms"><forms name=".AspNetSafetyForums" protection="Encryption" timeout="60" loginUrl="~/UserLogin.aspx"/></authentication><machineKey validationKey="C50B3C89CB21F4F1422FF158A5B42D0E8DB8CB5CDA1742572A487D9401E3400267682B202B746511891C1BAF47F8D25C07F6C39A104696DB51F17C529AD3CABE" decryptionKey="8A9BE8FD67AF6979E7D20198CFEA50DD3D3799C77AF2B72F" validation="SHA1"></machineKey><pages><controls><add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/><add tagPrefix="webdiyer" namespace="Wuqi.Webdiyer" assembly="AspNetPager"/><add tagPrefix="web" namespace="WebChart" assembly="WebChart"/><add tagPrefix="web" namespace="EeekSoft.Web" assembly="EeekSoft.Web.PopupWin"/><add tagPrefix="ajax" namespace="AjaxControlToolkit" assembly="AjaxControlToolkit"/></controls></pages><compilation debug="true"> <assemblies> <add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> <add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /> <add assembly="System.Web.Extensions.Design, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="Microsoft.ReportViewer.WebForms, Version=8.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> <add assembly="Microsoft.ReportViewer.Common, Version=8.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /> </assemblies> <buildProviders> <add extension=".rdlc" type="Microsoft.Reporting.RdlBuildProvider, Microsoft.ReportViewer.Common, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </buildProviders> </compilation><httpHandlers> <remove path="*.asmx" verb="*" /> <add path="*.asmx" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false" /> <add path="*_AppService.axd" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false" /> <add path="ScriptResource.axd" verb="GET,HEAD" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false" /> <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false" /> </httpHandlers><httpModules><add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/></httpModules></system.web> <system.webServer><validation validateIntegratedModeConfiguration="false"/><modules><add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/></modules><handlers><remove name="WebServiceHandlerFactory-Integrated"/><add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/><add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/><add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/></handlers></system.webServer></configuration>

bin目录下引用

AjaxControlToolkit.dll

System.Web.Extensions.Design.dll

System.Web.Extensions.dll

需要数据库的跟下

转自：51aspx