基于jquery的仿百度搜索框效果代码

最近项目中用到类似百度的输入框，于是自己用jquery写了一个。希望和大家共同分享一下。存在许多bug，请各位不吝赐教。

先看看整个的效果图：
图一：

图二：

图三：

图四：

大概的效果图就这样，接下来直接看源码
页面：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="autoSearch._Default" %>

<%if (false){ %>

<%} %>

CSS：

复制代码代码如下:

 
.autoSearchText{ 
border:solid 1px #CFCFCF; 
height:20px; 
color:Gray; 
} 
.menu_v{ 
margin:0; 
padding:0; 
line-height:20px; 
font-size:12px; 
list-style-type:none; 
} 
.menu_v li{ 
margin:0; 
padding:0; 
line-height:20px; 
font-size:14px; 
list-style-type:none; 
float:none; 
} 
.menu_v li span{ 
color:Red; 
} 
#autoSearchItem{ 
border:solid 1px #CFCFCF; 
visibility:hidden; 
position:absolute; 
background-color:white; 
overflow-y:auto; 
} 

JS：

复制代码代码如下:

1 ///
2
3 (function($) {
4 var itemIndex = 0;
5
6 $.fn.autoSearchText = function(options) {
7 //以下为该插件的属性及其默认值
8 var deafult = {
9 width: 200, //文本框宽
itemHeight: 150, // 下拉框高
minChar: 1, //最小字符数(从第几个开始搜索)
datafn: null, //加载数据函数
fn: null //选择项后触发的回调函数
};
var textDefault = $(this).val();
var ops = $.extend(deafult, options);
$(this).width(ops.width);
var autoSearchItem = '

';
$(this).after(autoSearchItem);
$('#autoSearchItem').width(ops.width + 2); //设置项宽
$('#autoSearchItem').height(ops.itemHeight); //设置项高
$(this).focus(function() {
if ($(this).val() == textDefault) {
$(this).val('');
$(this).css('color', 'black');
}
});
var itemCount = $('li').length; //项个数
/*鼠标按下键时，显示下拉框，并且划过项时改变背景色及赋值给输入框*/
$(this).bind('keyup', function(e) {
if ($(this).val().length >= ops.minChar) {
var position = $(this).position();
$('#autoSearchItem').css({ 'visibility': 'visible', 'left': position.left, 'top': position.top + 24 });
var data = ops.datafn($(this).val());
initItem($(this), data);
var itemCount = $('li').length;
switch (e.keyCode) {
case 38: //上
if (itemIndex > 1) {
itemIndex--;
}
$('li:nth-child(' + itemIndex + ')').css({ 'background': 'blue', 'color': 'white' });
$(this).val($('li:nth-child(' + itemIndex + ')').find('font').text());
break;
case 40: //下
if (itemIndex itemIndex++;
}
$('li:nth-child(' + itemIndex + ')').css({ 'background': 'blue', 'color': 'white' });
$(this).val($('li:nth-child(' + itemIndex + ')').find('font').text());
break;
case 13: //Enter
if (itemIndex > 0 && itemIndex <= itemCount) {
$(this).val($('li:nth-child(' + itemIndex + ')').find('font').text());
$('#autoSearchItem').css('visibility', 'hidden');
ops.fn($(this).val());
}
break;
default:
break;
}
}
});
/*点击空白处隐藏下拉框*/
$(document).click(function() {
$('#autoSearchItem').css('visibility', 'hidden');
});
};
/*获取文本框的值*/
$.fn.getValue = function() {
return $(this).val();
};
/*初始化下拉框数据,鼠标移过每项时，改变背景色并且将项的值赋值给输入框*/
function initItem(obj, data) {
var str = "";
if (data.length == 0) {
$('#autoSearchItem ul').html('

无符合数据

');
}
else {
for (var i = 1; i <= data.length; i++) {
str += "

" + i + "/" + data.length + "\r" + data[i - 1] + "

";
}
$('#autoSearchItem ul').html(str);
}
/*点击项时将值赋值给搜索文本框*/
$('li').each(function() {
$(this).bind('click', function() {
obj.val($(this).find('font').text());
$('#autoSearchItem').css('visibility', 'hidden');
});
});
/*鼠标划过每项时改变背景色*/
$('li').each(function() {
$(this).hover(
function() {
$('li:nth-child(' + itemIndex + ')').css({ 'background': 'white', 'color': 'black' });
itemIndex = $('li').index($(this)[0]) + 1;
$(this).css({ 'background': 'blue', 'color': 'white' });
obj.val($('li:nth-child(' + itemIndex + ')').find('font').text());
},
function() {
$(this).css({ 'background': 'white', 'color': 'black' });
}
);
});
};
})(jQuery);

getdata.ashx

复制代码代码如下:

 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Services; 
namespace table 
{ 
///  
/// $codebehindclassname$ 的摘要说明 
/// 
[WebService(Namespace = "http://tempuri.org/")] 
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] 
public class getData : IHttpHandler 
{ 
public void ProcessRequest(HttpContext context) 
{ 
context.Response.Clear(); 
string value = GetResult(); 
context.Response.Write(value); 
context.Response.End(); 
} 
private string GetResult() 
{ 
string result = string.Empty; 
result = @" 
[{""id"":""1"",""Code"":""1374123""}, 
{""id"":""2"",""Code"":""1374133""}, 
{""id"":""3"",""Code"":""1374143""}, 
{""id"":""4"",""Code"":""1374153""}, 
{""id"":""5"",""Code"":""1374163""}, 
{""id"":""6"",""Code"":""1374173""}, 
{""id"":""7"",""Code"":""1374183""}, 
{""id"":""8"",""Code"":""1374193""}, 
{""id"":""9"",""Code"":""1374213""}, 
{""id"":""10"",""Code"":""1374223""}, 
{""id"":""11"",""Code"":""1374233""}, 
{""id"":""12"",""Code"":""1374243""}, 
{""id"":""13"",""Code"":""1374253""}, 
{""id"":""14"",""Code"":""1374263""}, 
{""id"":""15"",""Code"":""1374273""}, 
{""id"":""16"",""Code"":""1374283""}, 
{""id"":""17"",""Code"":""1374293""}, 
{""id"":""18"",""Code"":""1374313""}, 
{""id"":""19"",""Code"":""1374323""}, 
{""id"":""20"",""Code"":""1374333""}, 
{""id"":""21"",""Code"":""1374343""}, 
{""id"":""22"",""Code"":""1374353""}, 
{""id"":""23"",""Code"":""1374363""}, 
{""id"":""24"",""Code"":""1374373""}, 
{""id"":""25"",""Code"":""1374383""}, 
{""id"":""26"",""Code"":""1374393""}, 
{""id"":""27"",""Code"":""1374403""}, 
{""id"":""28"",""Code"":""1374413""}, 
{""id"":""29"",""Code"":""1374423""}, 
{""id"":""30"",""Code"":""1374433""}, 
{""id"":""31"",""Code"":""1374443""}, 
{""id"":""32"",""Code"":""1374453""}, 
{""id"":""33"",""Code"":""1374463""}, 
{""id"":""34"",""Code"":""1374473""}, 
{""id"":""35"",""Code"":""1374483""}, 
{""id"":""36"",""Code"":""1374493""}]"; 
return result; 
} 
public bool IsReusable 
{ 
get 
{ 
return false; 
} 
} 
} 
} 