Ajax联动下拉框的实现例子
?AjaxPro.dll 下載地址? http://ajaxpro.schwarz-interactive.de/download/ajaxpro.zip?
Web.Config
<?xml version="1.0"?>
<configuration>
?<system.web>
??????<httpHandlers>
???<add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" />
???<add verb="POST,GET" path="ajaxpro/*.ashx" type="AjaxPro.AjaxHandlerFactory,AjaxPro.2"/>
??</httpHandlers>
?</system.web>
</configuration>
AjaxTest.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AjaxTest.aspx.cs" Inherits="AjaxTest" %>
<!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>無標題頁</title>
</head>
<body>
<script language="javascript" type="text/javascript">
function areaResult()
{
var area=document.getElementById("DropDownList1");
//alert(area.value);
AjaxTest.GetCityList(area.value,get_city_Result_CallBack);
}
function get_city_Result_CallBack(response)
{
if (response.value != null)
{
? document.all("DropDownList2").length=0;
? var ds = response.value;
? if(ds != null && typeof(ds) == "object" && ds.Tables != null)
? {
?? for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].name;
var id=ds.Tables[0].Rows[i].id;
document.all("DropDownList2").options.add(new Option(name,id));
}
//document.all("TextBox1").value="";
?}
}
return
}
</script>
? <form id="form1" runat="server">
?????
?<asp:DropDownList ID="DropDownList1" runat="server">
??????? </asp:DropDownList>
??????? <asp:DropDownList ID="DropDownList2" runat="server">
??????? </asp:DropDownList>
????? <br />
??? </form>
</body>
</html>
AjaxTest.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
using MeetWeb;
public partial class AjaxTest : System.Web.UI.Page
{
??? protected void Page_Load(object sender, EventArgs e)
??? {
?????? AjaxPro.Utility.RegisterTypeForAjax(typeof(AjaxTest));
?????? if (!Page.IsPostBack)
?????? {
?????????? BindData();
?????? }
??? }
??? private void BindData()
??? {
??????? DataSet ds = new DataSet();
????????? String sql = "Select id,name from test";
????????? try
????????? {
????????????? ds = GetDataSet(sql, "test");
????????????? this.DropDownList1.DataSource = ds.Tables[0];
????????????? this.DropDownList1.DataTextField = "name";
????????????? this.DropDownList1.DataValueField = "id";
????????????? this.DropDownList1.DataBind();
????????????? this.DropDownList1.Attributes.Add("onclick", "areaResult();");
????????? }
????????? catch (Exception ex)
????????? {
????????????? Response.Write(ex.Message);
????????? }
??? }
??? public static DataSet GetDataSet(string sql,string aa)
??? {
??????? MeetWeb.SqlDataBase a = new MeetWeb.SqlDataBase("server=localhost\\PMSERVER;uid=sa;pwd=sa;database=test");
??????? DataSet ds = new DataSet();
??????? ds=a.CreateSet(sql, aa);
??????? return ds;
??? }
??? [AjaxPro.AjaxMethod]
??? public DataSet GetCityList(int id)
??? {
??????? string sql = "select name from test where id='" + id + "'";
??????? return GetDataSet(sql,"test");
??? }
}
轉載于:https://www.cnblogs.com/meetweb/archive/2007/03/16/677271.html
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