本文实例讲述了jQuery+Ajax实现限制查询间隔的方法。分享给大家供大家参考,具体如下:
<%@ 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异步查询加载效果</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%;\">语文</td><td style=\"width:30%;\">数学</td><td style=\"width:30%;\">英语</td></tr>
<tr><td>张三</td>
<td id=\"query1\" title=\"点击查询\" class=\"span_query\" data-value=\"1\">查询</td>
<td id=\"query2\" title=\"点击查询\" class=\"span_query\" data-value=\"2\">查询</td>
<td id=\"query3\" title=\"点击查询\" class=\"span_query\" data-value=\"3\">查询</td></tr>
</table>
</div>
</form>
</body>
</html>
<%@ WebHandler Language=\"C#\" Class=\"Handler\" %>
using System;
using System.Web;
using System.Web.SessionState;
//Handler.ashx
public 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) //第一次查询
{
context.Session[\"preQuery\"] = queryValue + \"@\" + DateTime.Now.AddDays(-1);
context.Session[\"currQuery\"] = queryValue + \"@\" + DateTime.Now;
}
else //存在上次查询
{
string[] preStrs = context.Session[\"currQuery\"].ToString().Split(\'@\');
context.Session[\"preQuery\"] = queryValue + \"@\" + preStrs[1]; //重置为当前查询参数+上次查询时间
context.Session[\"currQuery\"] = queryValue + \"@\" + DateTime.Now;
}
string[] strs=context.Session[\"preQuery\"].ToString().Split(\'@\');
if (strs[0] == queryValue) //同一请求限制查询间隔
{
DateTime preTime = Convert.ToDateTime(strs[1]);
DateTime nowTime = DateTime.Now;
bool flag = CheckQueryTimeSpan(preTime, nowTime, 3);
if (flag)
{
context.Response.Write(\"查询间隔3秒\");
}
else
{
context.Response.Write(\"98\");
}
}
context.Response.End();
}
/// <summary>
/// 判断本次查询和上次查询间隔是否小于指定秒数
/// </summary>
/// <param name=\"preTime\">上次查询时间</param>
/// <param name=\"nowTime\">本次查询时间</param>
/// <param name=\"timeSpan\">指定秒数</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;
}
}
}
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希望本文所述对大家jQuery程序设计有所帮助。
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