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Cookie登录保存

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="CZBK.ItcastProject.WebApp._2015_5_31.Login" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            用户名：<input type="text" name="txtName" value="<%=LoginUserName %>" /><br />
            密码：<input type="password" name="txtPwd" value="<%=LoginPwd %>" /><br />
            <input type="submit" value="登录" />
        </div>
    </form>
</body>
</html>

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

namespace CZBK.ItcastProject.WebApp._2015_5_31
{
    public partial class Login : System.Web.UI.Page
    {
        public string LoginUserName { get; set; }
        public string LoginPwd { get; set; }
        protected void Page_Load(object sender, EventArgs e)
        {
            if (IsPostBack)
            {
                string userName = Request.Form["txtName"];
                string userPwd = Request.Form["txtPwd"];
                //写到Cookie中
                Response.Cookies["userName"].Value = Server.UrlEncode(userName);
                Response.Cookies["userPwd"].Value = Server.UrlEncode(userPwd);
                Response.Cookies["userName"].Expires = DateTime.Now.AddDays(7);
                Response.Cookies["userPwd"].Expires = DateTime.Now.AddDays(7);
                //读取cookie.
                if (Request.Cookies["userName"] != null)
                {
                    string name = Server.UrlDecode(Request.Cookies["userName"].Value);
                    LoginUserName = name;
                }
                if (Request.Cookies["userPwd"] != null)
                {
                    string pwd = Server.UrlDecode(Request.Cookies["userPwd"].Value);
                    LoginPwd = pwd;
                }
            }
            else
            {
                //读取cookie.
                if (Request.Cookies["userName"]!=null)
                {
                    string name = Server.UrlDecode(Request.Cookies["userName"].Value);
                    LoginUserName = name;
                }
                if (Request.Cookies["userPwd"] != null)
                {
                    string pwd = Server.UrlDecode(Request.Cookies["userPwd"].Value);
                    LoginPwd = pwd;
                }
            }
        }
    }
}

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原文地址：https://www.cnblogs.com/wyt007/p/6105082.html