存储过程+Jquery+WebService实现三级联动：

首先看一下数据库的设计：

aaarticlea/png;base64,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" alt="" />

2.存储过程的写法：

ALTER proc [dbo].[pro_GetCity](
@city_pid int
)
as
begin
--SELECT * FROM tbl_city WHERE city_pid IN (
select * from tbl_city where city_pid=@city_pid
end

--exec [dbo].[pro_GetCity] 0

看一下执行效果：

aaarticlea/png;base64,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" alt="" />

服务层的代码：

 // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消注释以下行。
     [System.Web.Script.Services.ScriptService] 

      [WebMethod]
        public string CityList(string citycode)
        {
            return JsonHelper.GetJson<List<tbl_city>>(new SelectComboxBLL().CityList(citycode));
        }

数据层的代码：

        public List<tbl_city> CityList(string citycode)
        {
            SqlParameter[] pars = { new SqlParameter("@city_pid", citycode) };
            return new SQLBase().TableToEntity<tbl_city>(DBhelp.SqlHelper.GetTable("pro_GetCity", System.Data.CommandType.StoredProcedure, pars));
        }

业务层：

        public List<tbl_city> CityList(string citycode)
        {
            return new SelectCombox().CityList(citycode);
        }

最核心的jquery调用WebService：

      <script type="text/javascript">

          $(function () {
              //省市县的绑定
              $.ajax({
                  type: "post",
                  contentType: "application/json",
                  url: "/WebService/SelectComboxService.asmx/CityList",
                  data: "{citycode:'0'}",
                  success: function (result) {
                      var arr = null;
                      if (typeof result.d == 'string')
                          arr = JSON.parse(result.d);
                      else
                          arr = result.d;
                      var stroption = '';
                      for (var i = 0; i < arr.length; i++) {
                          stroption += '<option value=' + arr[i]._city_id + '>';
                          stroption += arr[i]._name;
                          stroption += '</option>';
                      }
                      $('#seprovince').append(stroption);
                  }
              })

              $('#seprovince').change(function () {
                  $('#secity option:gt(0)').remove();
                  $('#searea option:gt(0)').remove();

                  $.ajax({
                      type: "post",
                      contentType: "application/json",
                      url: "/WebService/SelectComboxService.asmx/CityList",
                      data: "{citycode:'" + $(this).val() + "'}",
                      success: function (result) {

                          var arr = null;
                          if (typeof result.d == 'string')
                              arr = JSON.parse(result.d);
                          else
                              arr = result.d;
                          var strocity = '';
                          for (var i = 0; i < arr.length; i++) {
                              strocity += '<option value=' + arr[i]._city_id + '>';
                              strocity += arr[i]._name;
                              strocity += '</option>';
                          }
                          $('#secity').append(strocity);
                      }
                  })
              })

              $('#secity').change(function () {
                  $('#searea option:gt(0)').remove();
                  $.ajax({
                      type: "post",
                      contentType: "application/json",
                      url: "/WebService/SelectComboxService.asmx/CityList",
                      data: "{citycode:'" + $(this).val() + "'}",
                      success: function (result) {
                          var arr = null;
                          if (typeof result.d == 'string')
                              arr = JSON.parse(result.d);
                          else
                              arr = result.d;
                          var stroarea = '';
                          for (var i = 0; i < arr.length; i++) {
                              stroarea += '<option value=' + arr[i]._city_id + '>';
                              stroarea += arr[i]._name;
                              stroarea += '</option>';
                          }
                          $('#searea').append(stroarea);
                      }
                  })
              })
          }）；

前端页面：

   <tr>
                                        <td>**  详细地址：</td>
                                        <td style="width:60%">
                                            <select id="seprovince"><option>--请选择--</option></select>省
                                              <select id="secity"><option>--请选择--</option></select>市
                                              <select id="searea"><option>--请选择--</option></select>区（县）
</td>
</tr>

最后来张效果图：

aaarticlea/png;base64,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" alt="" />

当然里面用了一些公用类库，有需要的私聊！