DropDownList 省市区无刷新三级联动

发布时间：2020-12-17 02:09:48 所属栏目：安全来源：网络整理

导读：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/

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,PublicKeyToken=31bf3856ad364e35"> <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection,PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/> <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup,PublicKeyToken=31bf3856ad364e35"> <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection,PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="Everywhere"/> <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection,PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/> <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection,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,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,PublicKeyToken=31bf3856ad364e35" /> <add assembly="System.Design,Version=2.0.0.0,PublicKeyToken=B03F5F7F11D50A3A" /> <add assembly="System.Windows.Forms,PublicKeyToken=B77A5C561934E089" /> <add assembly="System.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> <buildProviders> <add extension=".rdlc" type="Microsoft.Reporting.RdlBuildProvider,Microsoft.ReportViewer.Common,PublicKeyToken=b03f5f7f11d50a3a" /> </buildProviders> </compilation> <httpHandlers> <remove path="*.asmx" verb="*" /> <add path="*.asmx" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory,PublicKeyToken=31bf3856ad364e35" validate="false" /> <add path="*_AppService.axd" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory,PublicKeyToken=31bf3856ad364e35" validate="false" /> <add path="ScriptResource.axd" verb="GET,HEAD" type="System.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="System.Web.Handlers.ScriptModule,PublicKeyToken=31bf3856ad364e35"/> </httpModules> </system.web> <system.webServer> <validation validateIntegratedModeConfiguration="false"/> <modules> <add name="ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule,PublicKeyToken=31bf3856ad364e35"/> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated"/> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory,PublicKeyToken=31bf3856ad364e35"/> <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory,PublicKeyToken=31bf3856ad364e35"/> <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler,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

（编辑：李大同）

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