asp.net中Session小例子
登录界面aspx代码如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="session_login.aspx.cs" Inherits="session_login" %>
<!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></title>
<link href="StyleSheet.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
function isempty() {
var txt_id = document.getElementById("txt_userID");
if (txt_id.value == "") {
alert("请输入用户名!");
txt_id.focus();
return false;
}
else {return true;}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>登录界面</h3>
<p class ="divTc">
输入用户名：
<asp:TextBox ID="txt_userID" runat="server"></asp:TextBox>
</p>
<p class="divTc">
<asp:Button ID="btn_login" runat="server" Text="登录" onclick="btn_login_Click" OnClientClick="return isempty()" />
</p>
</div>
</form>
</body>
</html>
登录.aspx.cs代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class session_login : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btn_login_Click(object sender, EventArgs e)
{
Session["uid"] = txt_userID.Text;
Server.Transfer("session_check.aspx");
}
}读取.aspx代码如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="session_check.aspx.cs" Inherits="session_check" %>
<!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></title>
<link href="StyleSheet.css" rel="stylesheet" type="text/css" />
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:Button ID="Button1" runat="server" Text="退出登录" onclick="Button1_Click" />
</div>
</form>
</body>
</html>
读取.aspx.cs代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class session_check : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Session["uid"] != null)
{
string _id = Session["uid"].ToString();
Label1.Text = "欢迎登录，" + _id + "!";
}
else {
Response.Redirect("session_login.aspx");
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Session.Remove("uid");
//跳转到本身看看
Server.Transfer(Request.Url.LocalPath.ToString());
}
}
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