asp.net下使用AjaxPro实现二级联动代码

复制代码 代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="Test" %>

AjaxPro实现二级联动
省份
城市

using System; 
  
using System.Data; 
  
using System.Configuration; 
  
using System.Collections; 
  
using System.Collections.Generic; 
  
using System.Web; 
  
using System.Web.Security; 
  
using System.Web.UI; 
  
using System.Web.UI.WebControls; 
  
using System.Web.UI.WebControls.WebParts; 
  
using System.Web.UI.HtmlControls; 
  
 
  
 
  
/** 
  
* 写作说明：本文展示了如何利用AjaxPro与服务器交互，并且还展示了在Js中可以直接调用服务器返回的集合和直接调用服务器上class的属性 
  
* 作者：周公 
  
* 日期：2008-1-1 
  
* 首发地址：http://blog.csdn.net/zhoufoxcn/ 
  
**/ 
  
public partial class Test : System.Web.UI.Page 
  
{ 
  
protected void Page_Load(object sender, EventArgs e) 
  
{ 
  
if (!Page.IsPostBack) 
  
{ 
  
List stateList = new List(10); 
  
stateList.Add(new State(0, "选择城市"));//默认选项 
  
stateList.Add(new State(1,"北京")); 
  
stateList.Add(new State(2, "天津")); 
  
stateList.Add(new State(3, "上海")); 
  
stateList.Add(new State(4, "湖北")); 
  
stateList.Add(new State(5, "湖南")); 
  
stateList.Add(new State(6, "山西")); 
  
ddlStateList.DataSource = stateList; 
  
ddlStateList.DataBind(); 
  
ddlStateList.Attributes["onchange"] = "ShowCity(this.options[selectedIndex].value)"; 
  
} 
  
AjaxPro.Utility.RegisterTypeForAjax(typeof(Test));//注册 
  
} 
  
[AjaxPro.AjaxMethod] 
  
public List GetCityList(int stateId) 
  
{ 
  
//呵呵，都是我熟悉的城市或者区 
  
List cityList = new List(12); 
  
cityList.Add(new City(11, "海淀区", 1)); 
  
cityList.Add(new City(12, "朝阳区", 1)); 
  
cityList.Add(new City(13, "大港区", 2)); 
  
cityList.Add(new City(14, "南开区", 2)); 
  
cityList.Add(new City(15, "普陀区", 3)); 
  
cityList.Add(new City(16, "黄浦区", 3)); 
  
cityList.Add(new City(17, "黄冈市", 4)); 
  
cityList.Add(new City(18, "荆州市", 4)); 
  
cityList.Add(new City(19, "长沙市", 5)); 
  
cityList.Add(new City(20, "岳阳市", 5)); 
  
cityList.Add(new City(21, "太原市", 6)); 
  
cityList.Add(new City(22, "大同市", 6)); 
  
List tempList = new List(); 
  
for (int i = 0; i < cityList.Count; i++) 
  
{ 
  
if (cityList[i].StateId == stateId) 
  
{ 
  
tempList.Add(cityList[i]); 
  
} 
  
} 
  
return tempList; 
  
} 
  
} 
  
/// 
 
  
/// 省份信息 
  
/// 
 
  
public class State 
  
{ 
  
private int stateId; 
  
private string stateName; 
  
/// 
 
  
/// 省份名 
  
/// 
 
  
public string StateName 
  
{ 
  
get { return stateName; } 
  
set { stateName = value; } 
  
} 
  
 
  
/// 
 
  
/// 省份编号 
  
/// 
 
  
public int StateId 
  
{ 
  
get { return stateId; } 
  
set { stateId = value; } 
  
} 
  
public State(int stateId, string stateName) 
  
{ 
  
this.stateId = stateId; 
  
this.stateName = stateName; 
  
} 
  
} 
  
/// 
 
  
/// 城市信息 
  
/// 
 
  
public class City 
  
{ 
  
private int cityId; 
  
private int stateId; 
  
private string cityName; 
  
/// 
 
  
/// 城市名称 
  
/// 
 
  
public string CityName 
  
{ 
  
get { return cityName; } 
  
set { cityName = value; } 
  
} 
  
 
  
/// 
 
  
/// 城市所在省份编号 
  
/// 
 
  
public int StateId 
  
{ 
  
get { return stateId; } 
  
set { stateId = value; } 
  
} 
  
 
  
/// 
 
  
/// 城市编号 
  
/// 
 
  
public int CityId 
  
{ 
  
get { return cityId; } 
  
set { cityId = value; } 
  
} 
  
 
  
public City(int cityId, string cityName, int stateId) 
  
{ 
  
this.cityId = cityId; 
  
this.cityName = cityName; 
  
this.stateId = stateId; 
  
} 
  
 
  
}