這次帶給大家Ajax怎麼實現下拉框無刷新連動，Ajax實作下拉框無刷新連動的注意事項有哪些，下面就是實戰案例，一起來看一下。
HTML程式碼：
@{
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>商圈选择</title>
<script type="text/javascript">
//选中
function select(selId, id, callback) {
$("#" + selId).val(id);
if (callback) callback();
}
//获取省列表
function getProvinces(callback) {
$.ajax({
type: "POST",
url: "@Url.Content("~/Backstage/Area/GetProvinces")",
data: {},
success: function (text) {
$("#province").html(text);
if (callback) callback();
},
error: function () {
}
});
}
//获取市列表
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 () {
}
});
}
//获取区县列表
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 () {
}
});
}
//获取商圈列表
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">==请选择==</option>
</select>
<select id="city">
<option value="-1">==请选择==</option>
</select>
<select id="county">
<option value="-1">==请选择==</option>
</select>
<select id="area">
<option value="-1">==请选择==</option>
</select>
<script type="text/javascript">
//选择省
$("#province").change(function () {
var id = $(this).find("option:selected").val();
getCities(id, function () {
$("#city").change();
});
});
//选择市
$("#city").change(function () {
var id = $(this).find("option:selected").val();
getCounties(id, function () {
$("#county").change();
});
});
//选择区县
$("#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程式碼：
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>
/// 行政区划
/// </summary>
public class AreaController : AdminBaseController
{
#region 构造函数及变量
private SQLiteHelper.SQLiteHelper sqliteHelper;
private AreaDal areaDal;
public AreaController()
{
sqliteHelper = new SQLiteHelper.SQLiteHelper();
areaDal = new AreaDal();
}
#endregion
#region 行政区划商圈级联选择页面
public ActionResult AreaSelect()
{
return PartialView();
}
#endregion
#region 获取全部省
public ActionResult GetProvinces()
{
DataTable dt = areaDal.GetProvincesAll();
StringBuilder sbHtml = new StringBuilder();
sbHtml.Append("<option value='-1'>==请选择==</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 根据省获取市
public ActionResult GetCities(string provinceId)
{
DataTable dt = areaDal.GetCities(provinceId);
StringBuilder sbHtml = new StringBuilder();
sbHtml.Append("<option value='-1'>==请选择==</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 根据市获取区县
public ActionResult GetCounties(string cityId)
{
DataTable dt = areaDal.GetCounties(cityId);
StringBuilder sbHtml = new StringBuilder();
sbHtml.Append("<option value='-1'>==请选择==</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 根据区县获取商圈
public ActionResult GetAreas(string countyId)
{
DataTable dt = areaDal.GetAreas(countyId);
StringBuilder sbHtml = new StringBuilder();
sbHtml.Append("<option value='-1'>==请选择==</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
}
}#相信看了本文案例你已經掌握了方法，更多精彩請關注php中文網其它相關文章！
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