本文實例講述了jQuery+Ajax實現限制查詢間隔的方法。分享給大家供大家參考，具體如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Jquery20150305.aspx.cs" Inherits="Jquery20150305" %><!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 runat="server"> <title>Jquery異步查詢加載效果</title> <script src="JS/jquery-1.9.1.js" type="text/javascript"></script> <link href="Styles/Site.css" rel="stylesheet" type="text/css" /> <style type="text/css"> .span_query { cursor:pointer;} </style> <script type="text/javascript"> $(function () { $(".span_query").click(function () { var val = $(this).attr("data-value"); var id = $(this).attr("id"); AjaxQuery($(this),val); }); }); function AjaxQuery(obj, v) { $.ajax({ url: 'Ajax/Handler.ashx?queryType=score&queryValue=' + v, type: 'POST', dataType: 'text', timeout: 10000, cache: false, beforeSend: LoadFunction, error: erryFunction, success: succFunction }) function LoadFunction() { obj.html('<img src="Images/loading02.gif" />'); } function erryFunction() { obj.html('error'); } function succFunction(tt) { obj.html(''); obj.html(tt); } } </script></head><body> <form id="form1" runat="server"> <div> <table style="width:100%" class="gvCss"> <tr class="head"><td style="width:10%;">姓名</td><td style="width:30%;">語文</td><td style="width:30%;">數學</td><td style="width:30%;">英語</td></tr> <tr><td>張三</td> <td id="query1" title="點擊查詢" class="span_query" data-value="1">查詢</td> <td id="query2" title="點擊查詢" class="span_query" data-value="2">查詢</td> <td id="query3" title="點擊查詢" class="span_query" data-value="3">查詢</td></tr> </table> </div> </form></body></html><%@ WebHandler Language="C#" Class="Handler" %>using System;using System.Web;using System.Web.SessionState;//Handler.ashxpublic class Handler : IHttpHandler, IRequiresSessionState{ public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; string queryType = context.Request["queryType"]; string queryValue = context.Request["queryValue"]; if (context.Session["preQuery"] == null) //第一次查詢 { context.Session["preQuery"] = queryValue + "@" + DateTime.Now.AddDays(-1); context.Session["currQuery"] = queryValue + "@" + DateTime.Now; } else //存在上次查詢 { string[] preStrs = context.Session["currQuery"].ToString().Split('@'); context.Session["preQuery"] = queryValue + "@" + preStrs[1]; //重置為當前查詢參數+上次查詢時間 context.Session["currQuery"] = queryValue + "@" + DateTime.Now; } string[] strs=context.Session["preQuery"].ToString().Split('@'); if (strs[0] == queryValue) //同一請求限制查詢間隔 { DateTime preTime = Convert.ToDateTime(strs[1]); DateTime nowTime = DateTime.Now; bool flag = CheckQueryTimeSpan(preTime, nowTime, 3); if (flag) { context.Response.Write("查詢間隔3秒"); } else { context.Response.Write("98"); } } context.Response.End(); } /// <summary> /// 判斷本次查詢和上次查詢間隔是否小于指定秒數 /// </summary> /// <param name="preTime">上次查詢時間</param> /// <param name="nowTime">本次查詢時間</param> /// <param name="timeSpan">指定秒數</param> /// <returns></returns> public bool CheckQueryTimeSpan(DateTime preTime, DateTime nowTime, int timeSpan) { TimeSpan ts = nowTime - preTime; int difference = ts.Seconds; bool flag = (difference < timeSpan) ? true : false; return flag; } public bool IsReusable { get { return false; } }}更多關于jQuery相關內容感興趣的讀者可查看本站專題：《jquery中Ajax用法總結》、《jQuery表格(table)操作技巧匯總》、《jQuery拖拽特效與技巧總結》、《jQuery擴展技巧總結》、《jQuery常見經典特效匯總》、《jQuery動畫與特效用法總結》、《jquery選擇器用法總結》及《jQuery常用插件及用法總結》
希望本文所述對大家jQuery程序設計有所幫助。
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