ajax实现无刷新省市县三级联动

 
  
 
 


 

  

   

    用户名
   
   

    
   
  
  

   

    密码
   
   

    
   
  
  

   

    确认密码
   
   

    
   
  
  

   

    邮箱
   
   

    
   
  
  

   

    地址
   
   

    
     --请选择--
    
    省
    
     --请选择--
    市
    
     --请选择--
    县
   
  
 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;


namespace 省市县三级联动
{
 /// 

 /// WebService1 的摘要说明
 /// 
 [WebService(Namespace = "http://tempuri.org/")]
 [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
 [System.ComponentModel.ToolboxItem(false)]
 // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
  [System.Web.Script.Services.ScriptService]
 public class WebService1 : System.Web.Services.WebService
 {


  [WebMethod]
  public string HelloWorld()
  {
   return "Hello World";
  }
  [WebMethod]
  public List GetProvince()
  {
   BLL.province bpro = new BLL.province();
   List list = bpro.GetListModel();
   return list;
  }
  [WebMethod]
  public List GetCItyByPro(string proid)
  {
   BLL.city bcity = new BLL.city();
   List list = bcity.GetListModel("father='" + proid + "'");
   return list;
  }
  [WebMethod]
  public List GetAreaByCity(string cityid)
  {
   BLL.area barea = new BLL.area();
   List list = barea.GetListModel("father='" + cityid + "'");
   return list;
  }
 }
}

//city.cs：
 public List GetListModel(string strsql)
  {
   return dal.GetListModel(strsql);
  }
//area.cs：
  public List GetListModel(string strsql)
  {
   return dal.GetListModel(strsql);
  }

//city.cs：
public System.Collections.Generic.List GetListModel(string strsql)
  {
   System.Collections.Generic.List list = new System.Collections.Generic.List();
   DataTable dt = GetList(strsql).Tables[0];
   foreach (DataRow row in dt.Rows)
   {
    Model.city mcity = new Model.city();
    mcity.id = Convert.ToInt32(row["id"]);
    mcity.cityID = row["cityID"].ToString();
    mcity.cityname = row["cityname"].ToString();
    list.Add(mcity);
   }
   return list;
  }
//area.cs：
 public System.Collections.Generic.List GetListModel(string strsql)
  {
   DataTable dt = GetList(strsql).Tables[0];
   System.Collections.Generic.List list = new System.Collections.Generic.List();
   foreach (DataRow row in dt.Rows)
   {
    Model.area marea = new Model.area()
    {
     id = Convert.ToInt32(row["id"]),
     areaID = row["areaID"].ToString(),
     areaname = row["areaname"].ToString()
    };
    list.Add(marea);
   }
   return list;
  }