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 动态数据下的锚点错位问题解决方法
jQuery 动画基础教程
jQuery 操作XML入门
ASP SQL防注入的方法
jquery 插件 web2.0分格的分页脚本,可用于ajax无刷新分页
jquery 插件 任意位置浮动固定层
JavaScript 检测浏览器和操作系统的脚本
不要小看注释掉的JS 引起的安全问题
js实现的验证,学习用js控制td
javascript iframe中打开文件,并检测iframe存在否
Javascript typeof 用法
Javascript valueOf 使用方法
extjs form textfield的隐藏方法
extjs grid取到数据而不显示的解决
Ext第一周 史上最强学习笔记---GridPanel(基础篇)
My Desktop :) 桌面式代码
javascript 双击文本框编辑功能代码
不用写JS也能使用EXTJS视频演示
js 提取class相同的节点集合
js Li来实现的效果

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: 230 ::
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>