jQuery Ajax实现下拉框无刷新联动

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

}
}