1、新建Jscript文件Example.js,代码如下:
(function ($) { var timeid; var lastValue; var options; var c; var d; var t; var excoder; $.fn.autoComplete = function (config) { c = $(this); var defaults = { c.width() + 4, //提示框的宽度,默认跟文本框一样 maxheight: 150, //提示框的最大高度 top: 6, //与文本框的上下距离 url: "", //ajax 请求地址 type: "post", //ajax 请求类型 async: false, //是否异步请求 autoLength: 0, //文本长度大于0就请求服务器 getValue: function (value) { }, //当回车或鼠标点击选中值的时候执行 clearValue: function () { }, //当重新请求时清空Value值 getText: function (text) { } //当回车或鼠标点击选中值的时候执行 }; options = $.extend(defaults, config); var p = c.position(); d = $('<div id="autoComplete_Group"></div>'); c.after(d); d.css({ "left": p.left, "top": p.top + c.height() + options.top, "width": options.width, "max-height": options.maxheight }); t = $('<table cellspacing="0" cellpadding="2"></table>'); d.append(t); d.append('<input style="display:none" />'); c.bind("keydown", keydown_process); c.bind("keyup", keyup_process); c.bind("blur", blur_process); d.bind("focus", focus_div); d.bind("mouseout", mouseout_div); } function blur_process() { timeid = setTimeout(function () { d.hide(); }, 200); } function mouseout_div() { t.find(".nowRow").removeClass("nowRow"); } function focus_div() { clearTimeout(timeid); c.focus(); } function keydown_process(e) { if (d.is(":hidden")) { return; } switch (e.keyCode) { case 38: e.preventDefault(); var p = t.find(".nowRow").prev(); if (p.length > 0) { d.setScroll(options.maxheight, p); p.mouseover(); } else { p = t.find("tr:last"); if (p.length > 0) { d.setScroll(options.maxheight, p); p.mouseover(); } } break; case 40: e.preventDefault(); var n = t.find(".nowRow").next(); if (n.length > 0) { d.setScroll(options.maxheight, n); n.mouseover(); } else { n = t.find("tr:first"); if (n.length > 0) { d.setScroll(options.maxheight, n); n.mouseover(); } } break; case 13: e.preventDefault(); var n = t.find(".nowRow"); if (n.length > 0) { options.getValue(n.find("input:hidden").val()); c.val(n.text()); options.getText(c.val()); lastValue = ""; d.hide(); } break; } } function keyup_process(e) { if (excoder == null) { excoder = e.keyCode; } else if (excoder == 38 || excoder == 40) { excoder = e.keyCode; return; } else { excoder = e.keyCode; } if (e.keyCode == 38 || e.keyCode == 40 || e.keyCode == 37 || e.keyCode == 39) { return; } if (c.val().length > options.autoLength) { if (c.val() == lastValue) { return; //判断是否跟上一次的值相等 } lastValue = c.val(); //记录请求值 options.clearValue(); //清空值 getData(c, function (data) { if (data.length == 0) { d.hide(); return; } t.find("tr").remove(); $.each(data, function () { t.append('<tr><td>' + this.text + '<input type="hidden" value="' + this.value + '" /></td></tr>'); }); var rows = t.find("tr"); rows.mouseover(function () { t.find(".nowRow").removeClass("nowRow"); $(this).addClass("nowRow"); }); rows.click(function () { options.getValue($(this).find("input:hidden").val()); c.val($(this).text()); options.getText(c.val()); lastValue = ""; d.hide(); }); c.setPosition(); d.show(); }); } else { lastValue = ""; d.hide(); } } function getData(o, process) { $.ajax({ type: options.type, async: options.async, //控制同步 url: options.url, data: o.attr("id") + "=" + o.val(), dataType: "json", cache: false, success: process, Error: function (err) { alert(err); } }); } $.fn.resetEvent = function () { c.bind("keydown", keydown_process); c.bind("keyup", keyup_process); c.bind("blur", blur_process); d.bind("focus", focus_div); d.bind("mouseout", mouseout_div); } $.fn.setPosition = function () { var p = c.position(); d.css({ "left": p.left, "top": p.top + c.height() + options.top }); } $.fn.setScroll = function (h, o) { var offset = o.offset(); if (offset.top > h) { $(this).scrollTop(offset.top - h); } else { if (offset.top < 25) { //项的高度 对应样式表 td height:25px $(this).scrollTop(0); } } } })(jQuery);
2、新建Web窗体Example.aspx,在页面body中加入以下代码:
<body> <form id="form1" runat="server"> <div> 请输入芜湖市公交站点名称:<input id="txt_station" type="text" /> </div> </form> </body>
在页面head中引用jquery及刚刚编写的Example.js,代码如下:
<script src="js/jquery-1.8.2.min.js" type="text/javascript"></script> <script src="js/Example.js" type="text/javascript"></script> <script type="text/javascript" language="javascript"> $(document).ready(function () { $("#txt_station").autoComplete({ url: "Example1.aspx" }); }); </script>
在页面head中编写智能提示的div样式,代码如下:(可以单独写到样式表文件,然后引用)
<style type="text/css"> #autoComplete_Group { border: 1px solid #817F82; position: absolute; overflow-y: auto; overflow-x: hidden; display: none; } #autoComplete_Group table { background: none repeat scroll 0 0 #FFFFFF; cursor: default; width: 100%; } #autoComplete_Group td { color: #000000; font: 14px/25px arial; height: 25px; padding: 0 8px; } #autoComplete_Group .nowRow { background-color: #EBEBEB; } </style>
3、新建Web窗体Example1.aspx,在后台Example1.aspx.cs中加入以下代码:
protected void Page_Load(object sender, EventArgs e) { string jsonArray = ""; string keyword = Request["txt_station"]; DataSet ds = GetList(keyword); jsonArray = "["; for (int i = 0; i < ds.Tables[0].Rows.Count; i++) { jsonArray += "{"text":"" + ds.Tables[0].Rows[i][0].ToString() + "","value":"" + ds.Tables[0].Rows[i][0].ToString() + ""}" + ","; } jsonArray = jsonArray.TrimEnd(','); jsonArray += "]"; Response.Write(jsonArray); Response.End(); }
运行效果如下: