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：

Session["username"])="aa";Session("username")="aa"

读取一个SESSINN：

string username= Session["username"];

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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.Nowdim mycookie as HttpCookiemycookie=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 "";        }