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Ajax实现无刷新三联动下拉框

發布時間:2023/11/27 生活经验 36 豆豆
生活随笔 收集整理的這篇文章主要介紹了 Ajax实现无刷新三联动下拉框 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

1.html代碼
<HTML>
????
<HEAD>
????????
<title>Ajax實現無刷新三聯動下拉框</title>
????????
<meta?content="Microsoft?Visual?Studio?.NET?7.1"?name="GENERATOR">
????????
<meta?content="C#"?name="CODE_LANGUAGE">
????????
<meta?content="JavaScript"?name="vs_defaultClientScript">
????????
<meta?content="http://schemas.microsoft.com/intellisense/ie5"?name="vs_targetSchema">
????????
<SCRIPT?language="javascript">????????????
????????????
//城市------------------------------
????????????function?cityResult()?
????????????
{?
????????????????
var?city=document.getElementById("DropDownList1");
????????????????AjaxMethod.GetCityList(city.value,get_city_Result_CallBack);
????????????}

????????????
????????????
function?get_city_Result_CallBack(response)
????????????
{
????????????????
if?(response.value?!=?null)
????????????????
{????????????????????
????????????????????
//debugger;
????????????????????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].city;
      ????????????????
var?id=ds.Tables[0].Rows[i].cityID;
      ????????????????document.all(
"DropDownList2").options.add(new?Option(name,id));
    ????????????????}

????????????????????}

????????????????}
????????????????
????????????????
return
????????????}

????????????
//市區----------------------------------------
????????????function?areaResult()?
????????????
{?
????????????????
var?area=document.getElementById("DropDownList2");
????????????????AjaxMethod.GetAreaList(area.value,get_area_Result_CallBack);
????????????}

????????????
function?get_area_Result_CallBack(response)
????????????
{
????????????????
if?(response.value?!=?null)
????????????????
{????????????????????
????????????????????document.all(
"DropDownList3").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].area;
      ????????????????
var?id=ds.Tables[0].Rows[i].areaID;
      ????????????????document.all(
"DropDownList3").options.add(new?Option(name,id));
    ????????????????}
????????????????
????????????????????}

????????????????}

????????????????
return
????????????}

????????????
function?getData()
????????????
{
????????????????
var?province=document.getElementById("DropDownList1");
????????????????
var?pindex?=?province.selectedIndex;
????????????????
var?pValue?=?province.options[pindex].value;
????????????????
var?pText??=?province.options[pindex].text;
????????????????
????????????????
var?city=document.getElementById("DropDownList2");
????????????????
var?cindex?=?city.selectedIndex;
????????????????
var?cValue?=?city.options[cindex].value;
????????????????
var?cText??=?city.options[cindex].text;
????????????????
????????????????
var?area=document.getElementById("DropDownList3");
????????????????
var?aindex?=?area.selectedIndex;
????????????????
var?aValue?=?area.options[aindex].value;
????????????????
var?aText??=?area.options[aindex].text;
????????????????
????????????????
var?txt=document.getElementById("TextBox1");????????????????????????????????

????????????????document.getElementById(
"<%=TextBox1.ClientID%>").innerText="省:"+pValue+"|"+pText+"市:"+cValue+"|"+cText+"區:"+aValue+"|"+aText;
????????????}

????????
</SCRIPT>
????
</HEAD>
????
<body?ms_positioning="GridLayout">
????????
<form?id="Form1"?method="post"?runat="server">
????????????
<TABLE?id="Table1"?style="Z-INDEX:?101;?LEFT:?96px;?POSITION:?absolute;?TOP:?32px"?cellSpacing="1"
????????????????cellPadding
="1"?width="300"?border="1"?bgColor="#ccff66">
????????????????
<TR>
????????????????????
<TD>省市</TD>
????????????????????
<TD><asp:dropdownlist?id="DropDownList1"?runat="server"></asp:dropdownlist></TD>
????????????????
</TR>
????????????????
<TR>
????????????????????
<TD>城市</TD>
????????????????????
<TD><asp:dropdownlist?id="DropDownList2"?runat="server"></asp:dropdownlist></TD>
????????????????
</TR>
????????????????
<TR>
????????????????????
<TD>市區</TD>
????????????????????
<TD><asp:dropdownlist?id="DropDownList3"?runat="server"></asp:dropdownlist></TD>
????????????????
</TR>
????????????
</TABLE>
????????????
<asp:TextBox?id="TextBox1"?style="Z-INDEX:?102;?LEFT:?416px;?POSITION:?absolute;?TOP:?48px"?runat="server"
????????????????Width
="424px"></asp:TextBox><INPUT?style="Z-INDEX:?103;?LEFT:?456px;?WIDTH:?56px;?POSITION:?absolute;?TOP:?96px;?HEIGHT:?24px"
????????????????type
="button"?value="test"?onclick="getData();">
????????
</form>
????
</body>
</HTML> 2.cs代碼
using?System;
using?System.Collections;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Web;
using?System.Web.SessionState;
using?System.Web.UI;
using?System.Web.UI.WebControls;
using?System.Web.UI.HtmlControls;
namespace?AjaxTest
{
????
///?<summary>
????
///?Summary?description?for?WebForm1.
????
///?</summary>

????public?class?WebForm1?:?System.Web.UI.Page
????
{
????????
protected?System.Web.UI.WebControls.DropDownList?DropDownList1;
????????
protected?System.Web.UI.WebControls.DropDownList?DropDownList2;
????????
protected?System.Web.UI.WebControls.TextBox?TextBox1;
????????
protected?System.Web.UI.WebControls.DropDownList?DropDownList3;
????
????????
private?void?Page_Load(object?sender,?System.EventArgs?e)
????????
{????
????????????Ajax.Utility.RegisterTypeForAjax(
typeof(AjaxMethod));
????????????
if(!Page.IsPostBack)
????????????
{
????????????????
this.DropDownList1.DataSource=AjaxMethod.GetProvinceList();
????????????????
this.DropDownList1.DataTextField="province";
????????????????
this.DropDownList1.DataValueField="provinceID";
????????????????
this.DropDownList1.DataBind();
????????????????
????????????????
this.DropDownList1.Attributes.Add("onclick","cityResult();");
????????????????
this.DropDownList2.Attributes.Add("onclick","areaResult();");
????????????}

????????}


????????
Web?Form?Designer?generated?code????????
????}

}
3.AjaxMethod
using?System;
using?System.Data;
using?System.Data.SqlClient;
namespace?AjaxTest
{
????
///?<summary>
????
///?Summary?description?for?AjaxMethod.
????
///?</summary>

????public?class?AjaxMethod
????
{
????????
GetProvinceList

????????
GetCityList

????????
GetAreaList
????
????????
GetDataSet
????}

}
4.web.config
<httpHandlers>
????????????
<add?verb="POST,GET"?path="ajax/*.ashx"?type="Ajax.PageHandlerFactory,?Ajax"?/>
????
</httpHandlers> 5.ajax.dll下載/Files/singlepine/Ajax.rar
6.真實數據庫下載area1.rar
7.源代碼下載AjaxTest.rar ?

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