本文實例為大家分享了jQuery Ajax實現下拉框無刷新聯動的具體代碼，供大家參考，具體內容如下
HTML代碼：
@{ Layout = null;}@using DAL;@using System.Data;@{ AreaDal areaDal = new AreaDal(); string areaId = ViewBag.areaId; DataRow drArea = areaDal.GetArea(areaId); string countyId = drArea == null ? "-1" : drArea["countyId"].ToString(); DataRow drCounty = areaDal.GetCounty(countyId); string cityId = drCounty == null ? "-1" : drCounty["cityId"].ToString(); DataRow drCity = areaDal.GetCity(cityId); string provinceId = drCity == null ? "-1" : drCity["provinceId"].ToString();}<!DOCTYPE html><html><head> <title>商圈選擇</title> <script type="text/javascript"> //選中 function select(selId, id, callback) { $("#" + selId).val(id); if (callback) callback(); } //獲取省列表 function getProvinces(callback) { $.ajax({ type: "POST", url: "@Url.Content("~/Backstage/Area/GetProvinces")", data: {}, success: function (text) { $("#province").html(text); if (callback) callback(); }, error: function () { } }); } //獲取市列表 function getCities(pid, callback) { $.ajax({ type: "POST", url: "@Url.Content("~/Backstage/Area/GetCities")", data: { "provinceId": pid, }, success: function (text) { $("#city").html(text); if (callback) callback(); }, error: function () { } }); } //獲取區縣列表 function getCounties(pid, callback) { $.ajax({ type: "POST", url: "@Url.Content("~/Backstage/Area/GetCounties")", data: { "cityId": pid, }, success: function (text) { $("#county").html(text); if (callback) callback(); }, error: function () { } }); } //獲取商圈列表 function getAreas(pid, callback) { $.ajax({ type: "POST", url: "@Url.Content("~/Backstage/Area/GetAreas")", data: { "countyId": pid, }, success: function (text) { $("#area").html(text); if (callback) callback(); }, error: function () { } }); } </script></head><body> <select id="province"> <option value="-1">==請選擇==</option> </select> <select id="city"> <option value="-1">==請選擇==</option> </select> <select id="county"> <option value="-1">==請選擇==</option> </select> <select id="area"> <option value="-1">==請選擇==</option> </select> <script type="text/javascript"> //選擇省 $("#province").change(function () { var id = $(this).find("option:selected").val(); getCities(id, function () { $("#city").change(); }); }); //選擇市 $("#city").change(function () { var id = $(this).find("option:selected").val(); getCounties(id, function () { $("#county").change(); }); }); //選擇區縣 $("#county").change(function () { var id = $(this).find("option:selected").val(); getAreas(id, function () { $("#area").change(); }); }); getProvinces(function () { select("province", '@provinceId', function () { getCities('@provinceId', function () { select("city", '@cityId', function () { getCounties('@cityId', function () { select("county", '@countyId', function () { getAreas('@countyId', function () { select("area", '@areaId'); }); }); }); }); }); }); }); </script></body></html>Controller代碼：
using System;using System.Collections.Generic;using System.Data;using System.Linq;using System.Text;using System.Web.Mvc;using DAL;namespace Controllers.Backstage{ /// <summary> /// 行政區劃 /// </summary> public class AreaController : AdminBaseController { #region 構造函數及變量 private SQLiteHelper.SQLiteHelper sqliteHelper; private AreaDal areaDal; public AreaController() { sqliteHelper = new SQLiteHelper.SQLiteHelper(); areaDal = new AreaDal(); } #endregion #region 行政區劃商圈級聯選擇頁面 public ActionResult AreaSelect() { return PartialView(); } #endregion #region 獲取全部省 public ActionResult GetProvinces() { DataTable dt = areaDal.GetProvincesAll(); StringBuilder sbHtml = new StringBuilder(); sbHtml.Append("<option value='-1'>==請選擇==</option>"); foreach (DataRow dr in dt.Rows) { sbHtml.AppendFormat("<option value='{0}'>{1}</option>", dr["id"].ToString(), dr["name"].ToString()); } return Content(sbHtml.ToString()); } #endregion #region 根據省獲取市 public ActionResult GetCities(string provinceId) { DataTable dt = areaDal.GetCities(provinceId); StringBuilder sbHtml = new StringBuilder(); sbHtml.Append("<option value='-1'>==請選擇==</option>"); foreach (DataRow dr in dt.Rows) { sbHtml.AppendFormat("<option value='{0}'>{1}</option>", dr["id"].ToString(), dr["name"].ToString()); } return Content(sbHtml.ToString()); } #endregion #region 根據市獲取區縣 public ActionResult GetCounties(string cityId) { DataTable dt = areaDal.GetCounties(cityId); StringBuilder sbHtml = new StringBuilder(); sbHtml.Append("<option value='-1'>==請選擇==</option>"); foreach (DataRow dr in dt.Rows) { sbHtml.AppendFormat("<option value='{0}'>{1}</option>", dr["id"].ToString(), dr["name"].ToString()); } return Content(sbHtml.ToString()); } #endregion #region 根據區縣獲取商圈 public ActionResult GetAreas(string countyId) { DataTable dt = areaDal.GetAreas(countyId); StringBuilder sbHtml = new StringBuilder(); sbHtml.Append("<option value='-1'>==請選擇==</option>"); foreach (DataRow dr in dt.Rows) { sbHtml.AppendFormat("<option value='{0}'>{1}</option>", dr["id"].ToString(), dr["name"].ToString()); } return Content(sbHtml.ToString()); } #endregion }}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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