Ajax版省市三联动（源码）

最新推荐文章于 2021-06-22 20:39:52 发布

原创最新推荐文章于 2021-06-22 20:39:52 发布 · 759 阅读

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本文介绍了一个使用Ajax和jQuery实现的省市县三级联动选择器。该选择器通过调用WebService接口来动态加载省、市、县的数据，并在用户选择省份时自动更新下拉列表中的城市选项，在选择城市时更新县区选项。

*********************************WebService1.asmx页面***********************************

[WebMethod]
        public List<fenye.Model.province> GetProvince()
        {
            fenye.BLL.province prov = new fenye.BLL.province();
            List<fenye.Model.province> provlist = prov.GetListModel();
            return provlist;
        }
        [WebMethod]
        public List<fenye.Model.city> GetCity(string provid)
        {
            fenye.BLL.city city = new fenye.BLL.city();
            List<fenye.Model.city> citylist = city.GetListcity("father='" + provid + "'");
            return citylist;
        }
        [WebMethod]
        public List<fenye.Model.area> GetArea(string cityid)
        {
            fenye.BLL.area area = new fenye.BLL.area();
            List<fenye.Model.area> arealist = area.GetListarea("father='" + cityid + "'");
            return arealist;
        }

*********************************DAL province********************************************

/// <summary>
  /// 获得数据列表
  /// </summary>
  public DataSet GetList(string strWhere)
  {
   StringBuilder strSql=new StringBuilder();
   strSql.Append("select id,provinceID,provincename ");
   strSql.Append(" FROM province ");
   if(strWhere.Trim()!="")
   {
    strSql.Append(" where "+strWhere);
   }
   return DbHelperSQL.Query(strSql.ToString());
  }

//获取数据列表
        public List<Model.province> GetListModel()
        {
            List<Model.province> listprov = new List<Model.province>();
            DataTable dt = GetList("").Tables[0];
            foreach (DataRow row in dt.Rows)
            {
                Model.province prov = new Model.province();
                prov.id = Convert.ToInt32(row["id"]);
                prov.provinceID = row["provinceID"].ToString();
                prov.provincename = row["provincename"].ToString();
                listprov.Add(prov);
            }
            return listprov;
        }

***********************************DAL city*************************************************

/// <summary>
  /// 获得数据列表
  /// </summary>
  public DataSet GetList(string strWhere)
  {
   StringBuilder strSql=new StringBuilder();
   strSql.Append("select id,cityID,cityname,father ");
   strSql.Append(" FROM city ");
   if(strWhere.Trim()!="")
   {
    strSql.Append(" where "+strWhere);
   }
   return DbHelperSQL.Query(strSql.ToString());
  }

public List<Model.city> GetListcity(string strSql)
        {
            List<Model.city> listcity = new List<Model.city>();
            DataTable dt = GetList(strSql).Tables[0];
            foreach (DataRow row in dt.Rows)
            {
                Model.city city = new Model.city();
                city.cityID = row["cityID"].ToString();
                city.cityname = row["cityname"].ToString();
                listcity.Add(city);
            }
            return listcity;
        }

*************************DAL area*************************************

/// <summary>
  /// 获得数据列表
  /// </summary>
  public DataSet GetList(string strWhere)
  {
   StringBuilder strSql=new StringBuilder();
   strSql.Append("select id,areaID,areaname,father ");
   strSql.Append(" FROM area ");
   if(strWhere.Trim()!="")
   {
    strSql.Append(" where "+strWhere);
   }
   return DbHelperSQL.Query(strSql.ToString());
  }

public List<Model.area> GetListarea(string sqlStr)
        {
            List<Model.area> listarea = new List<Model.area>();
            DataTable dt = GetList(sqlStr).Tables[0];
            foreach (DataRow row in dt.Rows)
            {
                Model.area area = new Model.area();
                area.areaID = row["areaID"].ToString();
                area.areaname = row["areaname"].ToString();
                listarea.Add(area);
            }
            return listarea;
        }

********************************BLL provice***************************************

public List<Model.province> GetListModel()
        {
            return dal.GetListModel();
        }

*********************************BLL city******************************************

public List<Model.city> GetListcity(string sqlStr)
        {
            return dal.GetListcity(sqlStr);
        }

*********************************BLL area********************************************

public List<Model.area> GetListarea(string sqlStr)
        {
            return dal.GetListarea(sqlStr);
        }