重定向到另一个页面时会话始终为空?C# [英] Session is always null when redirect to another page? c#

问题描述

我尝试添加会话，然后在重定向后访问另一个页面，这始终显示为空

I tried to add session and then i accessed on another page after redirect this always show null

Session.Add("pUser_Name", ds_1.Tables[0].Rows[0]["User_Name"].ToString());
HttpContext.Current.ApplicationInstance.CompleteRequest();
Response.Redirect("DashBoard.aspx", false);

在这里我正在访问的另一个页面上

here on another page i am accessing like this

protected void Page_Load(object sender, EventArgs e)
{
     if (Session["pUser_Name"] == null)  ////here is error NULL
     {

         Response.Redirect("Admin.aspx");
     }
 }

我试过了

protected override void OnInit(EventArgs e)
{
    if (Session["pUser_Name"] == null)
    {
        Response.Redirect("Admin.aspx");
    }
    base.OnInit(e);
}

还有

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DashBoard.aspx.cs" Inherits="SC.DashBoard" EnableTheming="true"
Theme="Theme1" EnableSessionState="True" %>

和管理页面，其中为会话分配值

and Admin page where assigning value to session

 <%@ Page Language="C#" AutoEventWireup="true" EnableSessionState="True" CodeBehind="Admin.aspx.cs" Inherits="SC.Admin" %>

和 web.config 文件

and web.config file

<system.web>
   <compilation debug="true" targetFramework="4.0"/>
   <sessionState timeout="12000"/>
</system.web>

但仍然面临相同的会话为空

but still facing same session is null

推荐答案

基于此 answer 基本上指的是这个 msdn 文章关于 SessionID，您可能需要在 Session_Start 上初始化您的会话对象:

Based on this answer which basically refers to this msdn article about SessionID, you might need to initialise your session object on Session_Start:

protected void Session_Start(Object sender, EventArgs e) 
{
    Session["init"] = 0;
}

当会话状态存储在 cookie 中时，这是必需的，您当前根据 web.config 使用该 cookie.原因是 ASP.NET 在第一次使用之前不会保存会话，因此当您 Response.Redirectnew 页面请求都会生成一个新的 SessionID代码>到另一个页面.

This is required when session state is stored in a cookie, which you currently use based on your web.config. The reason is that ASP.NET does not save session up until its first usage and as a result a new SessionID is generated with each new page request which is happening when you Response.Redirect to another page.

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