DropDownList 省市区无刷新三级联动

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<a href="/tag/shujuku/" target="_blank" class="keywords">数据库</a>）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 Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Collections; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Services; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Services.Protocols; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Script.Services; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Collections.Generic; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Collections.Specialized; using AjaxControlToolkit; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Data.<a href="/tag/sql/" target="_blank" class="keywords">sql</a>Client; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Data; /// <summary> /// SNWebService 的<a href="/tag/zhaiyao/" target="_blank" class="keywords">摘要</a>说明 /// </summary> [WebService(Namespace = "http://te<a href="/tag/mpu/" target="_blank" class="keywords">mpu</a>ri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [ScriptService] public class SNWebService : Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Services.WebService { public SNWebService() { //如果使用设计的组件，请取消注释以下行 //InitializeComponent(); } /// <summary> /// <a href="/tag/huoqu/" target="_blank" class="keywords">获取</a>省份数据 /// </summary> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="k<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValues"></p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="category"></p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <returns></returns> [WebMethod] public CascadingDropDownNameValue[] GetProvinceContents(string k<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValues,string category) { List<CascadingDropDownNameValue> provinceList = new List<CascadingDropDownNameValue>(); string connectionString = Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>urationManager.AppSettings["ConnectionString"]; <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Connection <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn = new <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Connection(connectionString); <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn.<a href="/tag/open/" target="_blank" class="keywords">open()</a>; string str<a href="/tag/sql/" target="_blank" class="keywords">sql</a> = "Select * From Province"; <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Command <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Cmd = new <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Command(str<a href="/tag/sql/" target="_blank" class="keywords">sql</a>,<a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn); <a href="/tag/sql/" target="_blank" class="keywords">sql</a>DataReader dtrProvince = <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Cmd.ExecuteReader(); while (dtrProvince.Read()) { provinceList.Add(new CascadingDropDownNameValue(dtrProvince["Name"].ToString(),dtrProvince["Code"].ToString())); } dtrProvince.Close(); <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn.Close(); return provinceList.ToArray(); } /// <summary> /// <a href="/tag/huoqu/" target="_blank" class="keywords">获取</a>市数据 /// </summary> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="k<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValues"></p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="category"></p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <returns></returns> [WebMethod] public CascadingDropDownNameValue[] GetCityContents(string k<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValues,string category) { StringDictionary provinceList = CascadingDropDown.ParseK<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValue<a href="/tag/sst/" target="_blank" class="keywords">sst</a>ring(k<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValues); string connectionString = Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>urationManager.AppSettings["ConnectionString"]; <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Connection <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn = new <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Connection(connectionString); <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn.<a href="/tag/open/" target="_blank" class="keywords">open()</a>; string str<a href="/tag/sql/" target="_blank" class="keywords">sql</a> = "Select * From city Where ProvinceId='" + provinceList["Province"] + "'"; <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Command <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Cmd = new <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Command(str<a href="/tag/sql/" target="_blank" class="keywords">sql</a>,<a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn); <a href="/tag/sql/" target="_blank" class="keywords">sql</a>DataReader dtrCity = <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Cmd.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> /// <a href="/tag/huoqu/" target="_blank" class="keywords">获取</a>乡镇数据 /// </summary> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="k<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValues"></p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m name="category"></p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> /// <returns></returns> [WebMethod] public CascadingDropDownNameValue[] GetViliageContents(string k<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValues,string category) { StringDictionary cityList = CascadingDropDown.ParseK<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValue<a href="/tag/sst/" target="_blank" class="keywords">sst</a>ring(k<a href="/tag/Now/" target="_blank" class="keywords">Now</a>nCategoryValues); string connectionString = Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>urationManager.AppSettings["ConnectionString"]; <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Connection <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn = new <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Connection(connectionString); <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn.<a href="/tag/open/" target="_blank" class="keywords">open()</a>; string str<a href="/tag/sql/" target="_blank" class="keywords">sql</a> = "Select * From area Where CityId='" + cityList["City"] + "'"; <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Command <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Cmd = new <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Command(str<a href="/tag/sql/" target="_blank" class="keywords">sql</a>,<a href="/tag/sql/" target="_blank" class="keywords">sql</a>Conn); <a href="/tag/sql/" target="_blank" class="keywords">sql</a>DataReader dtrViliage = <a href="/tag/sql/" target="_blank" class="keywords">sql</a>Cmd.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"?> <con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration xmlns="http://schemas.microsoft.com/.NetCon<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration/v2.0"> <con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>Sections> <sectionGroup name="sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.web.extensions" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>WebExtensionsSectionGroup,Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Extensions,Version=1.0.61025.0,Culture=neutral,PublicKeyToken=31bf3856ad364e35"> <sectionGroup name="scripting" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.ScriptingSectionGroup,PublicKeyToken=31bf3856ad364e35"> <section name="scriptResourceHandler" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.ScriptingScriptResourceHandlerSection,PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n="Machin<a href="/tag/eto/" target="_blank" class="keywords">eto</a>Application"/> <sectionGroup name="webServices" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.ScriptingWebServicesSectionGroup,PublicKeyToken=31bf3856ad364e35"> <section name="jsonSerialization" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.ScriptingJsonSerializationSection,PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n="Everywhere"/> <section name="profileService" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.ScriptingProfileServiceSection,PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n="Machin<a href="/tag/eto/" target="_blank" class="keywords">eto</a>Application"/> <section name="authenticationService" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration.ScriptingAuthenticationServiceSection,PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDe<a href="/tag/Finitio/" target="_blank" class="keywords">Finitio</a>n="Machin<a href="/tag/eto/" target="_blank" class="keywords">eto</a>Application"/> </sectionGroup> </sectionGroup> </sectionGroup> </con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>Sections> <appSettings> <add key="ConnectionString" value="Data Source=(local);Initial Catalog=my51aspx;User ID=sa;Password=sa;"/> </appSettings> <sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.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="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.UI" assembly="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Extensions,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="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Extensions,PublicKeyToken=31bf3856ad364e35" /> <add assembly="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Design,Version=2.0.0.0,PublicKeyToken=B03F5F7F11D50A3A" /> <add assembly="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Forms,PublicKeyToken=B77A5C561934E089" /> <add assembly="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Extensions.Design,PublicKeyToken=31BF3856AD364E35" /> <add assembly="Microsoft.ReportViewer.WebForms,Version=8.0.0.0,PublicKeyToken=B03F5F7F11D50A3A" /> <add assembly="Microsoft.ReportViewer.Common,PublicKeyToken=B03F5F7F11D50A3A" /> </assemblies> <<a href="/tag/buildprovider/" target="_blank" class="keywords">buildprovider</a>s> <add extension=".rdlc" type="Microsoft.Reporting.Rdl<a href="/tag/buildprovider/" target="_blank" class="keywords">buildprovider</a>,Microsoft.ReportViewer.Common,PublicKeyToken=b03f5f7f11d50a3a" /> </<a href="/tag/buildprovider/" target="_blank" class="keywords">buildprovider</a>s> </compilation> <httpHandlers> <remove path="*.asmx" verb="*" /> <add path="*.asmx" verb="*" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Script.Services.ScriptHandlerFactory,PublicKeyToken=31bf3856ad364e35" validate="false" /> <add path="*_AppService.axd" verb="*" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Script.Services.ScriptHandlerFactory,PublicKeyToken=31bf3856ad364e35" validate="false" /> <add path="ScriptResource.axd" verb="GET,HEAD" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Handlers.ScriptResourceHandler,PublicKeyToken=31bf3856ad364e35" validate="false" /> <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler,Microsoft.ReportViewer.WebForms,PublicKeyToken=b03f5f7f11d50a3a" validate="false" /> </httpHandlers> <httpModules> <add name="ScriptModule" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Handlers.ScriptModule,PublicKeyToken=31bf3856ad364e35"/> </httpModules> </sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.web> <sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.webServer> <validation validateIntegratedModeCon<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration="false"/> <modules> <add name="ScriptModule" preCondition="integratedMode" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Handlers.ScriptModule,PublicKeyToken=31bf3856ad364e35"/> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated"/> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Script.Services.ScriptHandlerFactory,PublicKeyToken=31bf3856ad364e35"/> <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Script.Services.ScriptHandlerFactory,PublicKeyToken=31bf3856ad364e35"/> <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Web.Handlers.ScriptResourceHandler,PublicKeyToken=31bf3856ad364e35"/> </handlers> </sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.webServer> </con<a href="/tag/fig/" target="_blank" class="keywords">fig</a>uration>

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

DropDownList 省市区无刷新三级联动

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