session传值取值

protected void Page_Load(object sender, EventArgs e)
{
//判断session是否为空
if (Session["user"]!=null)
{
//UserInfo us = new UserInfo(string username,string pwd, string email);
UserInfo us = (UserInfo)Session["user"];
this.username.Text = us.Username;
this.pwd.Text = us.Pwd;
// string s = (string)Session["User"];
Response.Write(" <script>alert('您已经注册登陆了，即将返回首页！');</script>");
Response.Write(" <script>alert('跳转中');window.location.href='index.aspx';</script>");

}
else
{
Session["user"] = null;
}

}

protected void Button1_Click1(object sender, EventArgs e)
{
string usernams = this.username.Text;
string pwd = this.username.Text;
if (Session["user"]!=null)
{
UserInfo us=(UserInfo)Session["user"];

//假如session为空，证明没有注册，对于这种人，密码账号你就瞎写，让他注册才能打开
if (us.Username==usernams&&us.Pwd==pwd)
{
Response.Write(" <script>alert('跳转中');window.location.href='index.aspx';</script>");

}
else
{
Response.Write("<script>aleat('密码错误')</script>");
}
}
else
{
if ( usernams!="用户名你猜不到" && pwd!="密码你猜不到")
{
Response.Write("<script>alert('密码错误')</script>");
}
else
{
Response.Write(" <script>alert('跳转中');window.location.href='index.aspx';</script>");

}
}

// UserInfo us = new UserInfo
// {
// Username = (string)Session["User"]
// };

// Response.Write(" <script>alert('" +us. Username + "');</script>");
//}
//string ua=Session["user"];

//UserInfo us = new UserInfo();

//string s = (string)Session["User"] ;

// Response.Write(us.Pwd);
}
}

------------------登陆界面------------

protected void Button1_Click(object sender, EventArgs e)
{
UserInfo user = new UserInfo();
user.Username = this.username.Text;

user.Pwd = this.pwd.Text;
user.Email = this.email.Text;
Session["user"] = user;

// Response.Write(user.Pwd);
Response.Write(" <script>alert('注册成功，跳转中');window.location.href='index.aspx';</script>");

}

-----------注册-----------------------

//由于session的数据放在服务器，不能大量占用资源，创建个类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// UserInfo 的摘要说明
/// </summary>
public class UserInfo
{
public UserInfo()
{

}

/// <summary>
/// 创建用户名，密码，邮箱变量，存数据,封装变量，构造函数
/// </summary>

private string username;

public string Username
{
get { return username; }
set { username = value; }
}
private string pwd;

public string Pwd
{
get { return pwd; }
set { pwd = value; }
}
private string email;

public string Email
{
get { return email; }
set { email = value; }
}

public UserInfo(string username, string pwd, string Email) {

Username = username;
Pwd = pwd;
Email = email;
}
}

END