Posted in Javascript onAugust 13, 2013
博客的前某一篇文章中https://3water.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:
<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:
<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:
@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;}
后台的webservice代码这里就不展示了,主要就是查询数据库返回一个JSON格式的查询结果给Jquery中的Data
Jquery实现搜索框提示功能示例代码
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