ASP.NET Forms验证

        /// <summary>
        /// 执行用户登录操作
        /// </summary>
        /// <param name="config">授权配置信息</param>
        /// <param name="userData">与登录名相关的用户信息</param>
        /// <param name="expiration">登录Cookie的过期时间，单位：分钟，默认120分钟。</param>
        public static void SignIn(IovAuthConfig config, UserInfo userData, int expiration = 120)
        {
            if (config == null)
                throw new ArgumentNullException("config");
            if (userData == null)
                throw new ArgumentNullException("userData");
            if(string.IsNullOrWhiteSpace(config.AppID))
                throw new ArgumentNullException("AppID");
            // 1. 把需要保存的用户数据转成一个字符串。
            string data = null;
            if (userData != null)
                data = JsonHelper.Serialize(userData);

            // 2. 创建一个FormsAuthenticationTicket，它包含登录名以及额外的用户数据。
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(
                2, userData.LoginID, DateTime.Now, DateTime.Now.AddDays(1), true, data);

            // 3. 加密Ticket，变成一个加密的字符串。
            string cookieValue = FormsAuthentication.Encrypt(ticket);

            // 4. 根据加密结果创建登录Cookie
            HttpCookie cookie = new HttpCookie(config.AppID, cookieValue);
            cookie.HttpOnly = true;
            cookie.Secure = FormsAuthentication.RequireSSL;
            cookie.Domain = FormsAuthentication.CookieDomain;
            cookie.Path = FormsAuthentication.FormsCookiePath;
            //if (expiration > 0)
            //默认过期时间：120分钟
            cookie.Expires = DateTime.Now.AddMinutes(expiration == 0 ? 120 : expiration);

            HttpContext context = HttpContext.Current;
            if (context == null)
                throw new InvalidOperationException();

            // 5. 写登录Cookie
            context.Response.Cookies.Remove(cookie.Name);
            context.Response.Cookies.Add(cookie);
        }

　　web.config同时需要修改两个地方，如下：

  <system.web>
     <authentication mode="Forms">
      <forms name="IOV.Test" loginUrl="/" protection="All" timeout="43200" path="/" domain="" requireSSL="false" slidingExpiration="true" />
    </authentication>
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
  </system.web>

　　

  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"></modules>
  </system.webServer>

　　获取已登录用户信息：

        /// <summary>
        /// 获取当前用户信息
        /// </summary>
        /// <param name="context">当前Http请求上下文</param>
        /// <returns></returns>
        public static UserInfo TryGetUserInfo(HttpContext context)
        {
            if (context == null)
                throw new ArgumentNullException("context");

            // 1. 读登录Cookie
            HttpCookie cookie = context.Request.Cookies[FormsAuthentication.FormsCookieName];
            if (cookie == null || string.IsNullOrEmpty(cookie.Value))
                return null;

            try
            {
                UserInfo userData = null;
                // 2. 解密Cookie值，获取FormsAuthenticationTicket对象
                FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(cookie.Value);

                if (ticket != null && string.IsNullOrEmpty(ticket.UserData) == false)
                    // 3. 还原用户数据
                    userData = JsonHelper.Desrialize<UserInfo>(ticket.UserData);

                return userData;
            }
            catch { /* 有异常也不要抛出，防止攻击者试探。 */ }
            return null;
        }