当前位置: 首页 > 图文教程 > 网络编程 > Javascript > JS 自动完成 AutoComplete(Ajax 查询)

Javascript
javascript 面向对象的经典实例代码
javascript prototype原型操作笔记
JavaScript 常见对象类创建代码与优缺点分析
javascript 混合的构造函数和原型方式,动态原型方式
测试JavaScript字符串处理性能的代码
JQuery 表单中textarea字数限制实现代码
jQuery Selectors(选择器)的使用(六、属性篇)
IE浏览器打印的页眉页脚设置解决方法
javascript检测(控制 )上传文件大小
jquery 双色表格实现代码
JavaScript Cookie的读取和写入函数
JavaScript 利用Cookie记录用户登录信息
JavaScript Cookie显示用户上次访问的时间和次数
JavaScript Cookie 直接浏览网站分网址
javascript OFFICE控件测试代码
javascript setTimeout和setInterval 的区别
javascript弹出窗口 window.open使用方法以及参数说明分析篇
可以用来搜索当前页面内容的js代码
动态调整textarea中字体的大小代码
为指定元素增加样式的js代码

Javascript 中的 JS 自动完成 AutoComplete(Ajax 查询)


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-10-12   浏览: 308 ::
收藏到网摘: n/a

实现类似于百度或谷歌的搜索下拉列表的,就是打开百度往里输入你要查询的条件,只要你一输入他就自动弹出一个下拉列表框,并显示相关所有搜索内容
一:JS 部分
复制代码 代码如下:

//********************************************************
//创建日期: 2009-03-10
//作 者: oloen
//內容说明: 自动完成JS类
//用法:
// var auto = new autoComplete(客户端ID);
// auto.Init(document.all.客户端ID);
// auto.Type = 'PSUnit' //PSSale
//********************************************************
//自动完成
function autoComplete(id)
{
var me = this;
//自动完成绑定控件客户端ID
me.AutoCompleteControlID
me.handle = null
me.DivResult ;
me.currentIndex = -1;
me.LastIndex = -1;
me.requestObj;
me.CurrentTD = '';
me.Filter = '1=1';
me.Type = 'PSUnit'
if(id != null && typeof(id) != undefined)
me.AutoCompleteControlID = id;
if(me.DivResult == null||typeof(me.DivResult)=="undefined")
{
me.DivResult = document.createElement("div");
var parent = document.getElementById(me.AutoCompleteControlID).parentElement;
if(typeof(parent)!="undefined"){
parent.appendChild(me.DivResult);
}
}
this.Init = function(obj)
{
me.handle = obj
me.AutoCompleteControlID = obj.id
}
this.Auto = function()
{
me.DivResult.style.position = "absolute";
me.DivResult.style.top = me.handle.getBoundingClientRect().top - 11;
me.DivResult.style.left = me.handle.getBoundingClientRect().left;
me.DivResult.style.width = me.handle.width;
me.DivResult.style.height = 20;
me.DivResult.style.backgroundColor = "#ffffff";
//如果按下 向上, 向下 或 回车
if (event.keyCode == 38 || event.keyCode == 40 || event.keyCode == 13)
{
me.SelectItem();
}
else
{
//恢复下拉选择项为 -1
currentIndex = -1;
if(window.XMLHttpRequest)
{
me.requestObj = new XMLHttpRequest();
if(me.requestObj.overrideMimeType)
me.requestObj.overrideMimeType("text/xml");
}
else if(window.ActiveXObject)
{
try
{
me.requestObj = new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
me.requestObj = new ActiveXObject("Microsoft.XMLHTTP");
}
}
if(me.requestObj == null)
return;
me.requestObj.onreadystatechange = me.ShowResult;
me.requestObj.open("GET", "../Common/AutoComplete.aspx?InputValue=" + escape(me.handle.value) + "&Filter=" + me.Filter + "&Type=" + me.Type, true);
me.requestObj.send();
}
}
this.ShowResult = function()
{
if (me.requestObj.readyState == 4)
{
me.DivResult.innerHTML = me.requestObj.responseText;
me.DivResult.style.display = "";
}
}
this.SelectItem = function()
{
//结果
var result = document.getElementById("Tmp_AutoComplete_tblResult");
if (!result)
return;
if(result.rows[me.LastIndex] != null)
{
result.rows[me.LastIndex].style.backgroundColor = "#FFFFFF";
result.rows[me.LastIndex].style.color = "#000000";
}
var maxRow = result.rows.length;
//向上
if (event.keyCode == 38 && me.currentIndex > 0)
me.currentIndex--;
//向下
if (event.keyCode == 40 && me.currentIndex < maxRow-1)
me.currentIndex++;
//回车
if (event.keyCode == 13)
{
me.Select()
me.InitItem();
return;
}
if(result.rows[me.currentIndex]!=undefined)
{
//选中颜色
result.rows[me.currentIndex].style.backgroundColor = "#3161CE";
result.rows[me.currentIndex].style.color = "#FFFFFF";
}
me.DivResult.style.height = maxRow * 15;
me.LastIndex = me.currentIndex;
}
this.Select = function()
{
var result = document.getElementById("Tmp_AutoComplete_tblResult");
if (!result || result.rows.length<=0)
return;
//默认第一条记录
if(me.currentIndex < 0)
me.currentIndex = 0;
var ReturnValue = result.rows[me.currentIndex].ReturnValue;
if(ReturnValue != undefined)
{
me.DivResult.style.display = 'none';
//设置页面值
ReturnAutoComplete(ReturnValue);
}
}
this.Hide = function()
{
me.DivResult.style.display = 'none';
me.currentIndex = -1;
}
this.InitItem = function()
{
me.DivResult.style.display = 'none';
me.DivResult.innerHTML = "";
me.currentIndex = -1;
}
me.DivResult.onclick = function()
{
try{me.Auto();}catch(e){}
}
document.getElementById(me.AutoCompleteControlID).onclick = function(){
try{me.Auto();}catch(e){}
}
document.getElementById(me.AutoCompleteControlID).onkeyup = function(){
try{me.Auto();}catch(e){}
}
document.getElementById(me.AutoCompleteControlID).onkeydown = function(){
if (event.keyCode == 13)
{
try
{
me.Select()
me.InitItem();
}catch(e){}
}
}
document.getElementById(me.AutoCompleteControlID).onblur = function(){
me.Hide();
}
}

2 后台查询页面
复制代码 代码如下:

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 System.Data.SqlClient;
//********************************************************
//创建日期: 2009-03-10
//作 者: Oloen
//內容说明: 自动完成后台查询页面
// Type:pssale 合同查询
// Type:psunit 房间查询
//********************************************************
/// <summary>
/// 自动完成后台查询页面
/// </summary>
public partial class Common_AutoComplete : System.Web.UI.Page
{
const string tbStyle = @"style=""color:#F7922E""";
/// <summary>
/// 过滤条件
/// </summary>
string Filter = string.Empty;
/// <summary>
/// 查询值
/// </summary>
string InputValue = string.Empty;
/// <summary>
/// 自动完成类别
/// Type:pssale 合同查询
/// Type:psunit 房间查询
/// </summary>
string Type = string.Empty;
/// <summary>
/// 返回结果字符
/// </summary>
string ReturnStr = string.Empty;
private void Page_Load(object sender, System.EventArgs e)
{
switch (Type.ToLower())
{
case "pssale":
case "psunit":
default:
AutoPSUnitNo();
break;
}
Response.Clear();
Response.ContentType = "text/xml";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
Response.Write(ReturnStr);
Response.End();
}
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
Filter = Request.QueryString["Filter"] ?? "1=1";
InputValue = Request.QueryString["InputValue"] ?? "";
InputValue.Replace("'","''");
Type = Request.QueryString["Type"] ?? "";
}
/// <summary>
/// 售楼系统房间编号自动完成
/// </summary>
void AutoPSUnitNo()
{
if (!string.IsNullOrEmpty(InputValue))
{
ReturnStr = @"<table cellSpacing=""0"" cellPadding=""0"" width=""150px"" align=""center"" border=""0"" id=""Tmp_AutoComplete_tblResult"" style=""padding-left:5;padding-right:5; background-color:#FFFFFF;border:1px solid #999999;"">";
string Sql = string.Format(@"SELECT TOP 10 UnitID,UnitNo,ProjectNo,PhaseNo,BlockNo FROM View_PS_Unit WHERE UnitNo LIKE '%{0}%' AND {1}", InputValue, Filter);
if (Type.ToLower().Equals("pssale"))
Sql = string.Format(@"SELECT TOP 10 SaleID,UnitID,UnitNo,ContractNo,Name,SaleDate,SellingPrice,ProjectNo FROM View_PS_Sale_Unit WHERE UnitNo LIKE '%{0}%' AND {1}", InputValue, Filter);
using (SqlDataReader sdr = DataAccessHelper.ExecuteReader(Sql) as SqlDataReader)
{
if (sdr == null || !sdr.HasRows)
{
ReturnStr = string.Empty;
return;
}
while (sdr.Read())
{
string td = string.Format(@"<td height=""15"" nowrap>{0}</td>", sdr["ProjectNo"].ToString());
//td += string.Format(@"<td height=""15"" nowrap>{0}</td>", sdr["PhaseNo"].ToString());
//td += string.Format(@"<td height=""15"" nowrap>{0}</td>", sdr["BlockNo"].ToString());
td += string.Format(@"<td height=""15"" nowrap align=""right"" {1}>{0}</td>", sdr["UnitNo"].ToString(), tbStyle);
if (Type.ToLower().Equals("pssale"))
{
ReturnStr += string.Format(@"<tr ReturnValue=""{0},{1},{2},{3},{4},{5},{6}"">{7}</tr>",
sdr["SaleID"].ToString(), sdr["UnitID"].ToString(),
sdr["UnitNo"].ToString(), sdr["ContractNo"].ToString(),
sdr["Name"].ToString(), sdr["SaleDate"].ToString(),
sdr["SellingPrice"].ToString(), td);
}
else
ReturnStr += string.Format(@"<tr ReturnValue=""{0},{1}"">{2}</tr>", sdr["UnitID"].ToString(), sdr["UnitNo"].ToString(), td);
}
}
ReturnStr += @"</table>";
}
}
}

3 调用部分
复制代码 代码如下:

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb-2312" />
<script type="text/javascript" src="../JS/AutoComplete.js"></script>
<title>无标题 1</title>
</head>
<body>
<input id="t1" type="text">
<script>
var auto = new autoComplete('t1')
auto.Init(document.all.t1);
//选中后做的事情
function ReturnAutoComplete(ReturnValue)
{
alert(ReturnValue)
}
</script>
</body>
</html>