using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace WebApplication1{    public partial class Default : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {            //获取传递过来的那么                       if (Session["name"] == null)// “”            {                Response.Write("你还没有登录,请登录后在进入");                Response.End();//终止            }            else            {                Response.Write("欢迎" + Session["name"] + "登录");            }                    }        protected void Button1_Click(object sender, EventArgs e)        {            Session.Clear();//清除记录            Response.Redirect("Default.aspx");        }    }}

 

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace WebApplication1{    public partial class Demo : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {        }        protected void Button1_Click(object sender, EventArgs e)        {            //session会话对象            //浏览器与服务器的一次连接是一个会话           string i=  Session.SessionID;           Response.Write("会话ID"+i);           //session主要用来存放会话者的数据的           //session存放服务器内存中的，当前会话者拥有，绘画结束时对象释放           Session["name"] = TextBox1.Text;//往session存放一个数据           Session.Timeout = 1;//超过时间,默认值是20分钟        }        protected void Button2_Click(object sender, EventArgs e)        {            Response.Write("用户名:"+Session["name"]);        }    }}