Jquery实现搜索框提示功能示例代码

2019-11-20 22:24:59

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来源：转载

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博客的前某一篇文章中//www.VeVB.COm/article/35175.htm写过一个用Ajax来实现一个文本框输入的提示功能。最近在一个管理项目的项目中，使用后发现，真的反应很慢，数据量很大的情况下使用Ajax去实现真的不合适，于是，我又写了一个使用Jquery来实现方法。
废话不多说，上图上代码:

引用方式：

复制代码代码如下:

 
<body style="background-color: White;"> 
<form id="form1" runat="server"> 
<div id="filter_stationType"></div> 
<div class="gover_search" width="100%"> 
<div class="gover_search_form clearfix" width="100%"> 
<span class="search_t"><b>按项目名称检索：</b></span> 
　　　　　　　 <%--autocomplete="off" 这个设置是禁止浏览器自动完成提示功能（就是历史记录自动提示）--%> 
<asp:TextBox ID="search" runat="server" CssClass="input_search_key" Width="240px" autocomplete="off"></asp:TextBox> <asp:Button ID="btnSearchProject" runat="server" CssClass="search_btn" Text="查询" OnClick="btnSearchProject_Click" /> <div class="search_suggest" id="gov_search_suggest"> <ul> </ul> </div> </div> </div> </form> </body> 

JS代码：

复制代码代码如下:

 
<script type="text/javascript"> 
//实现搜索输入框的输入提示js类 
var oSearchSuggest = function(searchFuc) { 
// function oSearchSuggest(searchFuc) { 
var searchsubmit = $('#btnSearchProject'); 
var input = $('#search'); 
var suggestWrap = $('#gov_search_suggest'); 
var key = ""; 
var init = function() { 
input.bind('keyup', sendKeyWord); 
input.bind('blur', function() { setTimeout(hideSuggest, 100); }) 
} 
var hideSuggest = function() { 
suggestWrap.hide(); 
} 
//发送请求，根据关键字到后台查询 
var sendKeyWord = function(event) { 
//键盘选择下拉项 
if (suggestWrap.css('display') == 'block' && event.keyCode == 38 || event.keyCode == 40) { 
var current = suggestWrap.find('li.hover'); 
if (event.keyCode == 38) { 
if (current.length > 0) { 
var prevLi = current.removeClass('hover').prev(); 
if (prevLi.length > 0) { 
prevLi.addClass('hover'); 
input.val(prevLi.html()); 
} 
} else { 
var last = suggestWrap.find('li:last'); 
last.addClass('hover'); 
input.val(last.html()); 
} 
} else if (event.keyCode == 40) { 
if (current.length > 0) { 
var nextLi = current.removeClass('hover').next(); 
if (nextLi.length > 0) { 
nextLi.addClass('hover'); 
input.val(nextLi.html()); 
} 
} else { 
var first = suggestWrap.find('li:first'); 
first.addClass('hover'); 
input.val(first.html()); 
} 
} 
//输入字符 
} else { 
var valText = $.trim(input.val()); 
if (valText == '' || valText == key) { 
return; 
} 
searchFuc(valText); 
key = valText; 
} 
} 
//请求返回后，执行数据展示 
this.dataDisplay = function(data) { 
if (data.length <= 0) { 
suggestWrap.hide(); 
return; 
} 
//往搜索框下拉建议显示栏中添加条目并显示 
var li; 
var tmpFrag = document.createDocumentFragment(); 
suggestWrap.find('ul').html(''); 
for (var i = 0; i < data.length; i++) { 
li = document.createElement('LI'); 
li.innerHTML = data[i]; 
tmpFrag.appendChild(li); 
} 
suggestWrap.find('ul').append(tmpFrag); 
suggestWrap.show(); 
//为下拉选项绑定鼠标事件,实现鼠标点击选取 
suggestWrap.find('li').hover(function() { 
suggestWrap.find('li').removeClass('hover'); 
$(this).addClass('hover'); 
}, function() { 
$(this).removeClass('hover'); 
}).bind('mousedown', function() { 
input.val(this.innerHTML); 
suggestWrap.hide(); 
searchsubmit.click(); 
}); 
} 
init(); 
}; 
//实例化输入提示的JS,参数为进行查询操作时要调用的函数名 
var searchSuggest = new oSearchSuggest(sendKeyWordToBack); 
//这是一个模似函数，实现向后台发送ajax查询请求，并返回一个查询结果数据，传递给前台的JS,再由前台JS来展示数据。本函数由程序员进行修改实现查询的请求 
//参数为一个字符串，是搜索输入框中当前的内容 
function sendKeyWordToBack(keyword) { 
var sSearchKey = $("#search").val(); 
$("#search").bind("input propertychange", function(event) { 
sSearchKey = $("#search").val(); 
}); 
$.ajax({ 
url: "WebService/wbsBLL.asmx/GetSearchInfo", //后台webservice里的方法名称根据自己需要实现返回数据位json 
type: "POST", 
dataType: "json", 
async: false, 
contentType: "application/json; charset=utf-8", 
data: '{"sKeyName":"' + sSearchKey + '"}', 
traditional: false, 
beforeSend: function(x) { x.setRequestHeader("Content-Type", "application/json; charset=utf-8"); }, 
success: function(data) { 
var aData = []; 
for (var i in data) { 
var jsonObj = $.parseJSON(data[i]); 
for (var item in jsonObj) { 
jsonObj = eval(jsonObj.SeachTable); 
for (var i = 0; i < jsonObj.length; i++) { 
if (jsonObj[i].projectName != "") { 
aData.push(jsonObj[i].projectName); 
} 
} 
} 
} 
searchSuggest.dataDisplay(aData); 
}, 
error: function(msg, e) { 
$("#filter_stationType").html("SQL语句有错误"); 
}, 
complete: function(x) { 
} 
}); 
} 
</script> 

index.css:

复制代码代码如下:

 
@charset "utf-8"; 
/* CSS Document */ 
body, ul, li { 
margin: 0; 
padding: 0; 
} 
body{ 
font-size:12px; 
font-family:sumsun,arial; 
color:#666666; 
background:#FFFFFF; 
} 
#searchtable{background:#E4E9F2; border-bottom:1px solid #C8CFDA; padding:0px 8px;height: 33px;} 
#searchtable label{font-size:14px; display:inline-block; float:left; color:#333; text-shadow:1px 1px 0px #EBF5FA; font-weight:bold; padding:10px 0 8px 16px; background:url(../images/pemIcons.png) 2px -34px no-repeat; _background:url(../images/pemIcons.gif) 2px -34px no-repeat;} 
#searchtable #search{border: 1px solid #C3C3C3; border-top: 1px solid #7C7C7C; border-left: 1px solid #9A9A9A;background: url(../images/today.gif) 0 -162px white repeat-x;outline: none; padding:3px 4px; _padding:3px 4px 5px; display:inline-block; float:left; margin:6px 12px 4px 0; zoom:1;} 
#searchtable .btnSubmit{margin-top:6px;margin-left:5px; zoom:1; border: 1px solid #236300; background: #6B9F40 url(../images/buttonbg01.png) repeat-x 0 0; font-size:12px; color:#FFF; line-height:24px; height:24px; width:60px; font-weight:bold; display:block; text-align:center; float:left;} 
#searchtable .btnSubmit:hover{text-decoration:none; background-position:0 -32px;} 
#searchtable .btnSubmit:active{background-position:0 -64px;} 
#searchtable .fBtn:hover{color:#000;} 
table.datagrid { 
border:1px solid #DDDDDD; 
border-collapse:collapse; 
} 

.gover_search{ position:relative; z-index:99; height:33px; padding:15px 0 0 20px; border:1px solid #b8cfe6; border-bottom:0; background:#E4E9F2;border-bottom:1px solid #C8CFDA;} 
.gover_search_form{height:36px;} 
.gover_search .search_t{ float:left; width:112px; line-height:26px; color:#666666;} 
.gover_search .input_search_key{ float:left; width:462px; height:18px; padding:3px; margin-right:5px; border:1px solid #cccccc; line-height:18px; background:#FFFFFF;} 
.gover_search .search_btn{ padding-left:4px; width:68px; height:26px; overflow:hidden; border:1px solid #cccccc; text-align:center; color:#ffffff; letter-spacing:5px; background: #6B9F40 url(../images/buttonbg01.png) repeat-x 0 0; cursor:pointer; font-weight:bold;} 
.gover_search .search_suggest{ position:absolute; z-index:999; left:132px; top:41px; width:468px; border:1px solid #999999; display:none; } 
.gover_search .search_suggest li{height:24px; overflow:hidden; padding-left:3px; line-height:24px; background:#FFFFFF; cursor:default;} 
.gover_search .search_suggest li.hover{background:#DDDDDD;} 