C#登錄退出公共方法,登錄身份加密解密驗(yàn)證

功能：
用戶登錄方法 是否記住密碼自動(dòng)登錄
用戶退出方法

using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Web.Security;

namespace JsonsTeam.Common
{
    /// <summary>
    /// 用戶實(shí)用類(lèi)，自定義窗體身份驗(yàn)證時(shí)可以使用。
    /// </summary>
    public sealed class UserUtil
    {
        /// <summary>
        /// 用戶登錄方法
        /// </summary>
        /// <param name="username">用戶名</param>
        /// <param name="roles">用戶角色</param>
        /// <param name="isPersistent">是否持久cookie</param>
        public static void Login(string username, string roles, bool isPersistent)
        {
            DateTime dt = isPersistent ? DateTime.Now.AddMinutes(99999) : DateTime.Now.AddMinutes(60);
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(
              1, // 票據(jù)版本號(hào)
              username, // 票據(jù)持有者
              DateTime.Now, //分配票據(jù)的時(shí)間
              dt, // 失效時(shí)間
              isPersistent, // 需要用戶的 cookie 
              roles, // 用戶數(shù)據(jù)，這里其實(shí)就是用戶的角色
              FormsAuthentication.FormsCookiePath);//cookie有效路徑
            //使用機(jī)器碼machine key加密cookie，為了安全傳送
            string hash = FormsAuthentication.Encrypt(ticket);
            HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hash); //加密之后的cookie
  
            //將cookie的失效時(shí)間設(shè)置為和票據(jù)tikets的失效時(shí)間一致 
            HttpCookie u_cookie = new HttpCookie("username", username);
            if (ticket.IsPersistent)
            {
                u_cookie.Expires = ticket.Expiration;
                cookie.Expires = ticket.Expiration;
            }
  
            //添加cookie到頁(yè)面請(qǐng)求響應(yīng)中
            HttpContext.Current.Response.Cookies.Add(cookie);
            HttpContext.Current.Response.Cookies.Add(u_cookie);
        }
  
        /// <summary>
        /// 用戶退出方法
        /// </summary>
        public static void Logout()
        {
            HttpCookie cookie = HttpContext.Current.Response.Cookies[FormsAuthentication.FormsCookieName];
  
            if (cookie == null)
            {
                cookie = new HttpCookie(FormsAuthentication.FormsCookieName);
                HttpContext.Current.Response.Cookies.Add(cookie);
            }
            cookie.Expires = DateTime.Now.AddYears(-10);
  
            HttpCookie u_cookie = new HttpCookie("username", string.Empty);
            u_cookie.Expires = DateTime.Now.AddYears(-10);
            HttpContext.Current.Response.Cookies.Add(u_cookie);
        }
    }
}

原文鏈接：C#登錄退出公共方法,登錄身份加密解密驗(yàn)證