SESSION和COOKIE的使用

 在各个网页间的变量传递和一些记录用户的登陆信息要用到SESSION和COOKIE。在ASP.NET中使用COOKIE比ASP中稍微麻烦一点，因为我们要申明变量。首先看一下SESSION的使用，基本和ASP差不多
写入一个SESSION：
<span style="font-size:16px;">Session["username"])="aa"; Session("username")="aa" </span>
读取一个SESSINN：
<span style="font-size:16px;">string username= Session["username"]; </span>
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再来看一下COOKIE的写入：
DateTime dt=DateTime.Now; //需要<%@Import Namespace="System"%>，得到当前时间 HttpCookie mycookie=new HttpCookie("logname");//申明新的COOKIE变量 mycookie.Value="aa";//赋值 mycookie.Expires=Convert.ToDateTime(dt+TimeSpan.FromDays(1));//设定过期时间为1天 Response.Cookies.Add(mycookie1);//写入COOKIE

 

dt=DataTime.Now dim mycookie as HttpCookie mycookie=new HttpCookie("logname") mycookie.Value="aa" mycookie.Expires=Convert.ToDateTime(dt+TimeSpan.FromDays(1)) Response.Cookies.Add(mycookie1)

看一下COOKIE的读取：

HttpCookie mycookie=Request.Cookies["username"]; string username=mycookie.Value; ----------------------- dim mycookie as HttpCookie mycookie=Request.Cookies["username"] dim string=mycookie.Value

下面是js操作cookies的方法

//设置cookies function setCookie(name, value) { var days = 1; //此cookie将被保存1天 var exp = new Date(); exp.setTime(exp.getTime() + days * 24 * 60 * 60 * 1000); document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString(); } //删除cookies function delCookie(name) { var exp = new Date(); exp.setTime(exp.getTime() - 1); document.cookie = name + "=;expires=" + exp.toGMTString(); } //读取cookies function ReadCookie(name) { var acookie = document.cookie.split(';'); for (var i = 0; i < acookie.length; i++) { var arr = acookie[i].split('='); if (name == arr[0]) { if (arr.length > 1) return unescape(arr[1]); else return ""; } } return ""; }