本文實例講述了jQuery ajax仿Google自動提示SearchSuggess功能。分享給大家供大家參考，具體如下：
頁面：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!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>seach</title><script type="text/javascript" src="jquery.min.js" ></script><script type="text/javascript" src="js.js"></script><link href="css.css" rel="external nofollow" rel="stylesheet" type="text/css" /></head><body><form id="form1" runat="server"><div onClick="keyup_close();"><ul><li class="h_14"><iframe style="DISPLAY: none" id="if_keyup" name="if_keyup"></iframe><input id="kw" name="kw" class="h_15" onKeyUp="keyup(event)" autocomplete="off" /><div style="DISPLAY: none" id="keyup_d" class="sokeyup" ></div></li><li class="h_16"><input style="CURSOR: pointer" onClick="so_search();" src="searchbuttom.gif" type="image" /></li></ul></div></form></body></html>
css部分:
UL { padding: 0px; LIST-STYLE-TYPE: none; MARGIN: 0px; LIST-STYLE-IMAGE: none; height: 52px; }LI { PADDING-BOTTOM: 0px; LIST-STYLE-TYPE: none; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; LIST-STYLE-IMAGE: none; PADDING-TOP: 0px}.h_14 { BACKGROUND-IMAGE: url(text_search.jpg); TEXT-ALIGN: left; PADDING-BOTTOM: 1px; LINE-HEIGHT: 26px; MARGIN-TOP: 3px; PADDING-LEFT: 4px; WIDTH: 245px; BACKGROUND-REPEAT: no-repeat; BACKGROUND-POSITION: center 50%; FLOAT: left; HEIGHT: 26px; MARGIN-LEFT: 3px; VERTICAL-ALIGN: middle; OVERFLOW: hidden; MARGIN-RIGHT: 3px; PADDING-TOP: 2px}.h_15 { BORDER-BOTTOM: 0px; BORDER-LEFT: 0px; PADDING-BOTTOM: 0px; LINE-HEIGHT: 20px; PADDING-LEFT: 0px; WIDTH: 240px; PADDING-RIGHT: 0px; DISPLAY: block; FLOAT: left; HEIGHT: 20px; MARGIN-LEFT: 0px; FONT-SIZE: 14px; VERTICAL-ALIGN: middle; BORDER-TOP: 0px; BORDER-RIGHT: 0px; PADDING-TOP: 4px}.h_16 { WIDTH: 57px; FLOAT: left; HEIGHT: 32px; OVERFLOW: hidden; CURSOR: pointer}.sokeyup { Z-INDEX: 10000; BORDER-BOTTOM: #000000 1px solid; POSITION: absolute; BORDER-LEFT: #000000 1px solid; WIDTH: 245px; DISPLAY: none; CLEAR: both; OVERFLOW: hidden; BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid}.sokeyup_1 { LINE-HEIGHT: 20px; PADDING-LEFT: 4px; WIDTH: 237px; PADDING-RIGHT: 4px; HEIGHT: 20px; CLEAR: both; OVERFLOW: hidden}.sokeyup_2 { LINE-HEIGHT: 20px; WIDTH: 140px; FLOAT: left; HEIGHT: 20px; COLOR: #4c4c4c}.sokeyup_3 { TEXT-ALIGN: right; LINE-HEIGHT: 20px; WIDTH: 97px; FLOAT: right; HEIGHT: 20px; COLOR: #008000}.sokeyup_4 { LINE-HEIGHT: 20px; WIDTH: 237px; HEIGHT: 20px}.sokeyup_5 { LINE-HEIGHT: 20px; FLOAT: right; HEIGHT: 20px; COLOR: #0000cc; CURSOR: pointer; TEXT-DECORATION: underline}js部分:
function so_search(){var kw = $("#kw").val();var kid = 0;var kname=$("#select_kid").html();kw = encodeURI(kw);if(kw == ''){alert("請輸入要查找的關鍵詞");}else{location.href="search-" rel="external nofollow" rel="external nofollow" +kw+".html";}}//關閉搜索提示function keyup_close(){$("#keyup_d").hide();}//function keyup_over(id){$("#u_"+id).css("background-color","#0000CC");$("#l_"+id).css("color","#fff");}function keyup_out(id){$("#u_"+id).css("background-color","#fff");$("#l_"+id).css("color","#000");}function keyup_click(id){$("#keyup_d").hide();var kw=$("#l_"+id).html();kw = encodeURI(kw);location.href="search-" rel="external nofollow" rel="external nofollow" +kw+".html";}function keyup(event){if(window.event){var key =window.event.keyCode;}else{var key =event.which;}if(key!=38&&key!=40&&key!=13){var kw=$("#kw").val();//跨域獲取搜索提示var url ="JsonHandler.ashx?kw=" + encodeURI(kw) + "&time=" + new Date().toString();//中文$.get(url,function(data){if (data!='') {$("#keyup_d").html(data+'<ul class="sokeyup_4"><li id="l_0" style="display:none;"></li><li class="sokeyup_5" onclick="keyup_close()">關閉</li></ul>');$("#keyup_d").show();} else {$("#keyup_d").hide();}});}}var ul_id=0;$(window).keydown(function(event){if(window.event){var key =window.event.keyCode;}else{var key =event.which;}if (key==13) {if (searchFocus == true) {}}var ulcount=$("#keyup_d ul").size()-1;if($("#keyup_d").css("display")=="block"){//向上$("#l_0").html($("#kw").val());if(key==13) {if ($("#kw").val()!= "") {so_search();}}if (key==38) {ul_id--;if(ul_id<0){ul_id = ulcount;keyup_over(ul_id);}else{keyup_out(ul_id+1);keyup_over(ul_id);}$("#kw").val($("#l_"+ul_id).html());return false;}//向下if (key==40 ) {$("#l_0").html($("#kw").val());ul_id++;if(ul_id>ulcount){ul_id=0;keyup_out(ulcount);}else{keyup_out(ul_id-1);keyup_over(ul_id);}$("#kw").val($("#l_"+ul_id).html());return false;}}});ashx部分:
<%@ WebHandler Language="C#" Class="JsonHandler" %>using System;using System.Web;using System.Data.SqlClient;using System.Data;public class JsonHandler : IHttpHandler {public void ProcessRequest(HttpContext context){context.Response.ContentType = "text/plain";string Key = context.Request["kw"];if (Key !=null&&Key!=""){SqlConnection con = new SqlConnection("server=JUQI;database=NorthWind;uid=sa;pwd=sa;");con.Open();string str = "select distinct keyword,num from search where keyword like @kw order by keyword";SqlCommand com = new SqlCommand(str, con);com.Parameters.Add("@kw", SqlDbType.NVarChar).Value = "%"+ Key + "%";SqlDataReader sdr = com.ExecuteReader();string htmlstr = "";int i = 1;while (sdr.Read()){string kword = sdr["keyword"].ToString();string a = sdr["num"].ToString();htmlstr += "<ul class='sokeyup_1' onmouseover='keyup_over(" + i + ")' onmouseout='keyup_out(" + i + ")' onclick='keyup_click(" + i + ")' id='u_" + i + "'>";htmlstr += "<li class='sokeyup_2' id='l_" + i + "'>" + kword + "</li>";htmlstr += "<li class='sokeyup_3'>" + a + " 結果</li></ul>";i++;}context.Response.Write(htmlstr);context.Response.End();sdr.Close();con.Close();}}public bool IsReusable {get {return false;}}}SQL部分:
ALTER PROCEDURE [dbo].[suggest_search]@kw VARCHAR(100) ,@cityid intasbeginSELECT TOP 10 * FROM dbo.SearchIndex WHERE cityid=@cityid and keyword LIKE '' + @kw + '%'UNION ALLSELECT TOP 10 * FROM dbo.SearchIndex WHERE cityid= @cityid and pinyin LIKE '' + @kw + '%'ORDER BY searchtimes DESCEND
--一定要建組合索引……
var result = list.OrderByDescending(t => t.searchtimes).Select(t => t.keyword.Replace("'", "")).Take(10);string json = JsonConvert.SerializeObject(result, Formatting.Indented);string renderJSON = "KISSY.Suggest.callback({'result':" + json.Replace("/"", "/'") + "})";更多關于jQuery相關內容感興趣的讀者可查看本站專題：《jquery中Ajax用法總結》、《jQuery擴展技巧總結》、《jQuery常用插件及用法總結》、《jQuery常見經典特效匯總》及《jquery選擇器用法總結》
希望本文所述對大家jQuery程序設計有所幫助。
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