程序中保存状态的方式之Cookies

程序中保存状态的方式之 Cookies，之前写过一篇关于ViewState的。现在继续总结Cookies方式的

新建的测试页面login

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="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>
    <script type="text/javascript">
    function checkSubmit() {
        var user = document.getElementById("txtName");
            var reg = /^\s*$/;
            if (reg.test(user.value)) {
                alert("请输入用户名！");
                user.focus();
                return false;
            }
            var pwd = document.getElementById("txtPwd");
            if (reg.test(pwd.value)) {
                alert("请输入密码！");
                pwd.focus();
                return false;
            }

            return true;
        }
        </script>
</head>
<body>
    <form id="form1" runat="server">

    登录名：<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
    密码：<asp:TextBox ID="txtPwd" runat="server"></asp:TextBox>
    <asp:Button ID="btn_login" runat="server" Text="登录" onclick="btn_login_Click"  OnClientClick="return checkSubmit()"/>
    </form>
</body>
</html>

后台.cs文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

public partial class Login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btn_login_Click(object sender, EventArgs e)
    {
        string name = txtName.Text.Trim();
        string pwd = txtPwd.Text.Trim();
        if (name == string.Empty)
        {

            MessageBox.Show(this, "请输入用户名！");
            return;
        }
        if (pwd == string.Empty)
        {
           
            MessageBox.Show(this, "请输入密码！");
            return;
        }
    
        if (name == "test" && pwd == "123456")
        {
            Response.Cookies.Add(new HttpCookie("comID", "100"));
            Response.Cookies["comID"].Expires = DateTime.Now.AddDays(30);//设置过期时间,30天
            Response.Redirect("获取cookies.aspx");
        }
        else {
            MessageBox.Show(this,"用户名密码错误！");
        }
        
    }
    

    
}

获取cookies.aspx页面后台

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

public partial class 获取cookies : System.Web.UI.Page
{
    public string comid = "";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Request.Cookies["comID"] != null && Request.Cookies["comID"].Value != "")
        {
            comid = Request.Cookies["comID"].Value;//获取存入的comid
        }
        MessageBox.Show(this, "登录id=" + comid);
    }
}

删除Cookies

Response.Cookies[CountAdmin].Expires = DateTime.Now.AddDays(-1);//删除cookie

我登录的时候存入了100，访问login.aspx就会跳转到获取cookies页面，提示登录id=100,效果图如下：

posted on 2017-01-03 19:34 ~梅花~ 阅读(249) 评论(0) 编辑收藏举报