请问一个关于会话问题?

Question

由于客户端登陆信息保存在服务器的Session中,若在Session未发现指定的信息则向客户端提示用户未登陆,而所有的操作均是在WebService中。现在面临一个问题,若客户端是浏器则没有任何问题，但在其他客户端访问时，有些会每次访问时在服务器端都是都是不同的Session，就造成了用户未登陆现象。请问一下客户端需要提交哪些信息才能让服务器识别为同一Session，是否是需要提交Cookie?又是如何提交的。先谢了！

Answer 1

我要可用分，谁给我，我送qq币，联系我的账号名即可qq号，去a

Answer 2

其他客户端访问时,不是添加服务引用的方式.如Android应用程序.

Answer 3

将sessionID存到数据库中
每次操作前比对sessionID 如果不相同 就将上一个sessionID标记为过期
被标记为过期的SESSIONID 用户在操作时 被T下线 

Answer 4

用FormsAuthenticationTicket 去做，你这个有点像闪单点登录，服务端可以用WCF去写一个服务做判断－－－－－－－－－－－－－－－－－
前端调用服务的类
    /// <summary>
    /// 登录验证类
    /// </summary>
    public class LoginSecurityHandler
    {
        private static string CookieName = "UserCookie";
        #region 构造器        private LoginSecurityHandler() { }        #endregion        #region 保存Cookies        /// <summary>
        /// 保存Cookies
        /// </summary>
        /// <param name="CookieName"></param>
        /// <param name="ticket"></param>
        public static void SaveCookie(FormsAuthenticationTicket ticket)
        {
            HttpCookie cookie = new HttpCookie(CookieName); // cookie的名称.
            cookie.Domain = FormsAuthentication.CookieDomain;
            cookie.Expires = ticket.Expiration;
            cookie.Path = FormsAuthentication.FormsCookiePath;
            cookie.Name = CookieName;
            cookie.Values.Add("Expires", ticket.Expiration.ToString());
            cookie.Values.Add("User", ticket.UserData);            if (HttpContext.Current.Response.Cookies[CookieName] != null)
                HttpContext.Current.Response.Cookies.Remove(CookieName);
            System.Web.HttpContext.Current.Response.Cookies.Add(cookie);
            //Response.Cookies.Add(cookie);
        }        /// <summary>
        /// 从Cookie中获取用户名
        /// </summary>
        /// <param name="CookieName"></param>
        public static string GetCookieValue()
        {
            try
            {
                HttpCookie oCookie = System.Web.HttpContext.Current.Request.Cookies[CookieName];
                if (oCookie == null)
                {
                    //没有登录
                    return "";
                }
                else
                {
                    oCookie.Expires = Convert.ToDateTime(oCookie.Values["Expires"]);
                    return oCookie.Values["User"].ToString();
                }
            }
            catch (Exception ex)
            {
                throw new DuplicateCustomerException("获取Cookie失败,请重新登录！", ex);
            }        }        #endregion        #region 判断用户是否已经登录
        /// <summary>
        /// 判断用户是否已经登录
        /// </summary>
        /// <param name="CookieName"></param>
        public static bool LoginCheckCookie()
        {
            try
            {
                HttpCookie oCookie = System.Web.HttpContext.Current.Request.Cookies[CookieName];
                if ((oCookie == null) || (Convert.ToDateTime(oCookie.Values["Expires"]) < DateTime.Now))
                {
                    //没有登录
                    return false;
                }
                else
                {
                    oCookie.Expires = Convert.ToDateTime(oCookie.Values["Expires"]);
                    return true;
                }
            }
            catch (Exception ex)
            {
                throw new DuplicateCustomerException("登录检测失败！", ex);
            }        }
        #endregion        /// <summary>
        /// 清除Cookies
        /// </summary>
        /// <param name="CookieName"></param>
        /// <param name="ticket"></param>
        public static void ClearCookie()
        {
            try
            {                HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies[CookieName];
                if (cookie != null)
                {
                    cookie.Values.Clear();
                    SetUserCookieExpireTime(CookieName, -999);
                    cookie.Domain = FormsAuthentication.CookieDomain;
                    System.Web.HttpContext.Current.Response.Cookies.Set(cookie);
                }            }
            catch (Exception ex)
            {
                throw new DuplicateCustomerException("清除Cookie失败！", ex);
            }        }        public static void SetUserCookieExpireTime(string key, int days)
        {
            System.Web.HttpContext.Current.Response.Cookies[key].Domain = FormsAuthentication.CookieDomain;
            System.Web.HttpContext.Current.Response.Cookies[key].Path = "/";
            System.Web.HttpContext.Current.Response.Cookies[key].Expires = DateTime.Now.AddDays(days);
        }    }
    #region 自定义异常提示类
    public class CustomException : ApplicationException
    {
        public CustomException()
        {        }        public CustomException(string message, Exception inner)
            : base(message, inner)
        {        }
    }    public class DuplicateCustomerException : CustomException
    {
        public DuplicateCustomerException()
        {        }        public DuplicateCustomerException(string message, Exception inner)
            : base(message, inner)
        {        }
    }
    #endregion－－－－－－－－－－－－－－－－－－
Web.config 要加上
    <authentication mode="Forms" >
      <forms loginUrl="Login.aspx" domain="xxx.com"></forms>
    </authentication>
－－－－－－－－－－－－－－－－－
Login.aspx.cs
                //判断是否已经登录
                //CheckUserLogin();
                //已登录为true 未登录为 false
                try
                {
                    if (LoginSecurityHandler.LoginCheckCookie())
                    {
                        System.Web.HttpContext.Current.Response.Redirect("sss.aspx", false);
                    }
                }
                catch (Exception ex)
                {
                    ScriptManager.RegisterStartupScript(this.Page, typeof(Page), "Ex Failed", "alert('" + ex.Message + "！');", true);
                }
-----------------------
WCF服务类
这个里面的代码比较多

Answer 5

C#.NET判断某个Session存在与否
    for(int i=0;i<Session.Count;i++)//判断Session["NO"]是否存在
    {
     if(Session.Keys.Get(i).CompareTo("NO")==0)
      strNO=Session["NO"].ToString(); 
    }
或者用
Session["NO"]==null来判断地说。多谢~~~~ 提醒

Answer 6

Session[&quot;NO&quot;] == null

Answer 7

或者保存不同的state,判断state就行了！