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asp.net下使用AjaxPro实现二级联动代码

2019-09-09 10:51asp.net空间网 ASP.NET教程

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

代码如下:


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

<!DOCTYPE html PUBLIC "-//W3C//Dtd XHTML 1.0 Transitional//EN" "http://www.w3.org/tr/xhtml1/Dtd/xhtml1-transitional.dtd"> 

<html xmlns="http://www.w3.org/1999/xhtml" > 
<head runat="server"> 
<title>AjaxPro实现二级联动</title> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div> 
<table width="200" border="0" align="center" cellpadding="3" cellspacing="1" bordercolor="#FFFFFF" style="border-collapse: collapse"> 
<tr align="center"> 
<td height="20" colspan="2"> 
<strong>AjaxPro实现二级联动</strong> </td> 
</tr> 
<tr class="tdbg" > 
<td width="30%"> 
省份</td> 
<td width="70%" align="left"> 
<asp:DropDownList ID="ddlStateList" runat="server" DataTextField="StateName" DataValueField="StateId"> 
</asp:DropDownList></td> 
</tr> 
<tr class="tdbg" > 
<td><strong>城市</strong></td> 
<td align="left"> 
<asp:DropDownList ID="ddlCityList" runat="server"> 
</asp:DropDownList></td> 
</tr> 
</table> 

</div> 
<script language="javascript" type="text/javascript" defer="defer"> 
function ShowCity(id) 

var res=Test.GetCityList(parseInt(id)).value; 
var ddl=document.getElementById("<%=ddlCityList.UniqueID %>"); 
ddl.length=0; 
if(res) 

//res是服务器返回的一个List<City>集合 
for(var i=0;i<res.length;i++) 

ddl.options.add(new Option(res[i].CityName,res[i].CityId)); 
//从上面可以看出可以直接调用List<City>集合中的元素和它们的属性 



</script> 
</form> 
</body> 
</html> 
<DIV class=cnblogs_Highlighter><PRE class=brush:csharp>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<State> stateList = new List<State>(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<City> GetCityList(int stateId) 

//呵呵,都是我熟悉的城市或者区 
List<City> cityList = new List<City>(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<City> tempList = new List<City>(); 
for (int i = 0; i < cityList.Count; i++) 

if (cityList[i].StateId == stateId) 

tempList.Add(cityList[i]); 


return tempList; 


/// <summary> 
/// 省份信息 
/// </summary> 
public class State 

private int stateId; 
private string stateName; 
/// <summary> 
/// 省份名 
/// </summary> 
public string StateName 

get { return stateName; } 
set { stateName = value; } 


/// <summary> 
/// 省份编号 
/// </summary> 
public int StateId 

get { return stateId; } 
set { stateId = value; } 

public State(int stateId, string stateName) 

this.stateId = stateId; 
this.stateName = stateName; 


/// <summary> 
/// 城市信息 
/// </summary> 
public class City 

private int cityId; 
private int stateId; 
private string cityName; 
/// <summary> 
/// 城市名称 
/// </summary> 
public string CityName 

get { return cityName; } 
set { cityName = value; } 


/// <summary> 
/// 城市所在省份编号 
/// </summary> 
public int StateId 

get { return stateId; } 
set { stateId = value; } 


/// <summary> 
/// 城市编号 
/// </summary> 
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; 





</PRE> 
</DIV> 

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