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JS 仿google、百度搜索框输入信息智能提示的实现

JavaScript 水墨上仙 1642次浏览

JS 仿google、百度搜索框输入信息智能提示的实现

<!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>
    <title>仿google、百度搜索框输入信息智能提示的实现 兼容主流浏览器</title>
    <style type="text/css" media="screen">
        body
        {
            font: 11px arial;
        }
        .suggest_link
        {
            width:120px;
            background-color: #FFFFFF;
            padding: 2px 6px 2px 6px;
        }
        .suggest_link_over
        {
            width:120px;
            background-color: #E8F2FE;
            padding: 2px 6px 2px 6px;
        }
        #suggestResult
        {
            position: absolute;
            background-color: #FFFFFF;
            text-align: left;
            border: 1px solid #000000;
        }
        /*input*/
        .input_on
        {
            padding: 2px 8px 0pt 3px;
            height: 18px;
            border: 1px solid #999;
            background-color: #FFFFCC;
        }
        .input_off
        {
            padding: 2px 8px 0pt 3px;
            height: 18px;
            border: 1px solid #CCC;
            background-color: #FFF;
        }
        .input_move
        {
            padding: 2px 8px 0pt 3px;
            height: 18px;
            border: 1px solid #999;
            background-color: #FFFFCC;
        }
        .input_out
        {
            /*height:16px;默认高度*/
            padding: 2px 8px 0pt 3px;
            height: 18px;
            border: 1px solid #CCC;
            background-color: #FFF;
        }
    </style>
    <script language="javascript" type="text/javascript">
        var $ = document.getElementById;
        //创建XMLHttpRequest对象      
        function createXMLHttpRequest() {
            var obj;
            if (window.XMLHttpRequest) { //Mozilla 浏览器 
                obj = new XMLHttpRequest();
            }
            else if (window.ActiveXObject) { // IE浏览器 
                try {
                    obj = new ActiveXObject("Msxml2.XMLHTTP");
                } catch (e) {
                    try {
                        obj = new ActiveXObject("Microsoft.XMLHTTP");
                    } catch (e) { }
                }
            }
            return obj;
        }
        //当输入框的内容变化时,调用该函数
        function searchSuggest() {
            var inputField = $("txtSearch");
            var suggestText = $("suggestResult");
            if (inputField.value.length > 0) {
                var o = createXMLHttpRequest();
                var url = "SearchResult.ashx?searchText=" + escape(inputField.value);
                o.open("GET", url, true);
                o.onreadystatechange = function () {
                    if (o.readyState == 4) {
                        if (o.status == 200) {
                            var sourceItems = o.responseText.split("\n");
                            if (sourceItems.length > 1) {
                                suggestText.style.display = "";
                                suggestText.innerHTML = "";
                                for (var i = 0; i < sourceItems.length - 1; i++) {
                                    var sourceText = sourceItems[i].split("@")[1];
                                    var sourceValue = sourceItems[i].split("@")[0];
                                    var s = "<div onmouseover=\"javascript:suggestOver(this);\" ";
                                    s += " onmouseout=\"javascript:suggestOut(this);\" ";
                                    s += " onclick=\"javascript:setSearch('" + sourceText + "','" + sourceValue + "');\" ";
                                    s += " class=\"suggest_link\" >" + sourceText + "</div>";
                                    suggestText.innerHTML += s;
                                }
                            }
                            else {
                                suggestText.style.display = "none";
                            }
                        }
                    }
                };  //指定响应函数 
                o.send(null); // 发送请求 
            }
            else {
                suggestText.style.display = "none";
            }
        }
        function delayExecute() {
            $("valueResult").value = "";
            window.setTimeout(function () { searchSuggest() }, 800);   //延时处理
        }
        function suggestOver(div_value) {
            div_value.className = "suggest_link_over";
        }
        function suggestOut(div_value) {
            div_value.className = "suggest_link";
        }
        function setSearch(a, b) {
            $("txtSearch").value = a;
            $("valueResult").value = b;
            var div = $("suggestResult");
            div.innerHTML = "";
            div.style.display = "none";
        }
        function showResult() {
            alert($("txtSearch").value + $("valueResult").value);
        }
    </script>
</head>
<body>
    <form id="form1" action="">
    <input type="text" id="txtSearch" name="txtSearch" onkeyup="delayExecute();" size="20"
        class="input_out" onfocus="this.className='input_on';this.onmouseout=''" 
        onblur="this.className='input_off';this.onmouseout=function(){this.className='input_out'};"
        onmousemove="this.className='input_move'" onmouseout="this.className='input_out'" />
    <input type="hidden" id="valueResult" name="valueResult" value="" />
    <br />
    <div id="suggestResult" style="display: none">
    </div>
    <br/>
    <input id="button1" type="button" value="提交" onclick="showResult();" />
    </form>
</body>
</html>

服务器端C#代码

<%@ WebHandler Language="C#" Class="SearchResult" %>
using System;
using System.Web;
using System.Data;
public class SearchResult : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        object QueryWord=context.Request.QueryString["searchText"];
        if (QueryWord != null)
        {
            if (QueryWord.ToString().Trim().Length > 0)
            {
                DataTable dt = getDB();
                string returnText = "";
                if (dt != null && dt.Rows.Count > 0)
                {
                    DataRow[] dr = dt.Select(" name like '%" + QueryWord .ToString()+ "%' ");
                    if (dr.Length > 0) 
                    {
                        for (int i = 0; i < dr.Length; i++)
                        {
                            //可设置返回多字符串
                            returnText += dr[i]["id"].ToString() + "@" + dr[i]["name"].ToString() + "\n"; 
                        }
                    }
                }
                context.Response.Write(returnText);
                context.Response.End();
            }
        }        
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }
    /// <summary>
    /// 获取数据源的方法
    /// </summary>
    /// <returns>数据源</returns>
    private DataTable getDB()
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("id");
        dt.Columns.Add("name");
        dt.Columns.Add("age");
        dt.Rows.Add(new object[] { "000001", "张三", "26" });
        dt.Rows.Add(new object[] { "000002", "张晓", "26" });
        dt.Rows.Add(new object[] { "000003", "张岚", "27" });
        dt.Rows.Add(new object[] { "000004", "李四", "25" });
        dt.Rows.Add(new object[] { "000005", "李星", "27" });
        return dt;
    }
}


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