// countyId 区县id
public void getTownByCountyId(string countyId)
{
if (string.IsNullOrEmpty(countyId))
{
Response.Write("{\"success\":false,\"error\":\"参数错误！\"}");
}
List <TOWN> lst = RegionDal.getTownByCountyId(countyId);
Response.Write("{\"success\":true,\"data\":" + JsonHelper.ObjectToJson(lst) + "}");
}