如何Session实现跨站

在一台服务器上有个Session！

从一个站点跳转到另一个站点时要怎么操作才有效果的！Session的值依然存在的???

比如:www.abc.com跳到www.bcd.com  这两个网站是在同一个服务器上的... --------------------编程问答-------------------- 其实Session能不能跨域要取决去Cookie能不能跨域。

先看Cookie 跨域吧。

CookieContainer.GetCookies

CookieContainer cookieContainer = new CookieContainer();
req.CookieContainer = cookieContainer;

参考
--------------------编程问答-------------------- 帮忙顶一下！
跨站session值保存的问题，确实不太好处理~~~每一次都是提示被application flushed，不懂怎么回事 --------------------编程问答-------------------- Error Go Into Particulars:
Class Name:JuyTang.Web.Global
Member Name:Application_Error
ErrorName:SaveSessionID
ErrorMessage:Session state has created a session id, but cannot save it because the response was already flushed by the application.
ErrorString:   at System.Web.SessionState.SessionIDManager.SaveSessionID(HttpContext context, String id, Boolean& redirected, Boolean& cookieAdded)
   at System.Web.SessionState.SessionStateModule.CreateSessionId()
   at System.Web.SessionState.SessionStateModule.DelayedGetSessionId()
   at System.Web.SessionState.SessionStateModule.ReleaseStateGetSessionID()
   at System.Web.SessionState.SessionStateModule.OnReleaseState(Object source, EventArgs eventArgs)
   at System.Web.SessionState.SessionStateModule.OnEndRequest(Object source, EventArgs eventArgs)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

现在报错的内容！跪求高手！明再补100分!!!!! --------------------编程问答-------------------- session不能跨站吧
第一个网站把需要传的数据存到DB里，第2个网站取数据，新建session.这样做比较简单 --------------------编程问答-------------------- 利用序列化机制实现Session共享的原理：

1、Web Server 1的应用程序序列化Session信息为文本值（可以是Binary或Soap格式）

2、将序列化后的值写入文件，保存到File Server上

3、Web Server 2 对保存在File Server上的Session序列化后的值进行反序列化

4、在Web Server 2上重新构建Session值

下面我们来详细看看实现代码，分以下几个步骤：

1、创建一个类库工程：ShareSession

引入以下的命名空间：

System.configuration
System.Runtime.Serialization.Formatters.Soap
System.Web

2、创建一个类：SessionEntity

代码如下：

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;

namespace ShareSession
...{
    /**//* *****************************
     *
     *  Author      :    Xiaojun Liu
     *  Create Date :    2007.11.09
     *  Description :
     *
     * *****************************
    */

    [Serializable]
    public class SessionEntity
    ...{
        [NonSerialized]
        public string AUTH_GUID = "";

        private Hashtable _HtShareSession;

        public Hashtable HtShareSession
        ...{
            get
            ...{
                return this._HtShareSession;
            }
            set
            ...{
                this._HtShareSession = value;
            }
        }

        public SessionEntity(string guid)
        ...{
            this.AUTH_GUID = guid;
        }

    }//

}//

3、创建一个序列化、反序列化操作的类：ShareSessionFormatter

代码如下：

using System;
using System.Web;
using System.Data;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Serialization.Formatters.Soap;
using System.Runtime.Serialization.Formatters.Binary;
using System.Collections;
using System.IO;

namespace ShareSession
...{

    /**//* *****************************
     *
     *  Author      :    Xiaojun Liu
     *  Create Date :    2007.11.09
     *  Description :
     *
     * *****************************
    */

    /**//// <summary>
    /// 格式化操作器
    /// </summary>
    public class ShareSessionFormatter
    ...{

        private static string _ShareSessionPath = System.Configuration.ConfigurationManager.AppSettings["ShareSessionPath"].ToString();

        /**//// <summary>
        /// 序列化格式器类型
        /// </summary>
        public enum FormatterType
        ...{
            Binary,
            Soap
        };

        /**//// <summary>
        /// 执行序列化
        /// </summary>
        /// <param name="formatterType">类型</param>
        public static void Serialize(FormatterType formatterType)
        ...{
            if (HttpContext.Current.Session["AUTH_GUID"] == null)
            ...{
                HttpContext.Current.Session["AUTH_GUID"] = Guid.NewGuid().ToString();
            }
            Hashtable ht = new Hashtable();

            //遍历Session
            foreach (string key in HttpContext.Current.Session.Contents.Keys)
            ...{
                ht.Add(key, HttpContext.Current.Session[key]);
            }

            /**/////执行序列化
            switch (formatterType)
            ...{
                case FormatterType.Binary:
                    BinarySerialize(ht);
                    break;
                case FormatterType.Soap:
                    SoapSerialize(ht);
                    break;
                default:
                    break;
            }

        }

        /**//// <summary>
        /// 按照Binary格式序列化
        /// </summary>
        /// <param name="ht"></param>
        private static void BinarySerialize(Hashtable ht)
        ...{
            string guid = HttpContext.Current.Session["AUTH_GUID"].ToString();
            SessionEntity obj = new SessionEntity(guid);
            obj.HtShareSession = ht;

            // 创建一个文件guid.xml
            Stream stream = File.Open(_ShareSessionPath + guid + ".xml", FileMode.Create);
            BinaryFormatter formatter = new BinaryFormatter();

            //执行序列化
            formatter.Serialize(stream, obj);
            stream.Close();

            // 将对象置空
            obj = null;
        }

        /**//// <summary>
        /// 按照Soap格式序列化
        /// </summary>
        /// <param name="ht"></param>
        private static void SoapSerialize(Hashtable ht)
        ...{
            string guid = HttpContext.Current.Session["AUTH_GUID"].ToString();
            SessionEntity obj = new SessionEntity(guid);
            obj.HtShareSession = ht;

            // 创建一个文件guid.xml
            Stream stream = File.Open(_ShareSessionPath + guid + ".xml", FileMode.Create);
            SoapFormatter formatter = new SoapFormatter();

            //执行序列化
            formatter.Serialize(stream, obj);
            stream.Close();

            // 将对象置空
            obj = null;
        }

        /**//// <summary>
        /// 反序列化
        /// </summary>
        /// <param name="formatterType">传送端的Session["AUTH_GUID"]</param>
        /// <param name="guid"></param>
        public static void Deserialize(FormatterType formatterType, string guid)
        ...{
            switch (formatterType)
            ...{
                case FormatterType.Binary:
                    BinaryDeserialize(guid);
                    break;
                case FormatterType.Soap:
                    SoapDeserialize(guid);
                    break;
                default:
                    break;
            }
        }

        /**//// <summary>
        /// 以Binary方式反序列化
        /// </summary>
        private static void BinaryDeserialize(string guid)
        ...{
            SessionEntity obj = new SessionEntity(guid);

            // 打开文件guid.xml
            Stream stream = File.Open(_ShareSessionPath + guid + ".xml", FileMode.Open);
            BinaryFormatter formatter = new BinaryFormatter();

            obj = (SessionEntity)formatter.Deserialize(stream);
            stream.Close();

            Hashtable ht = obj.HtShareSession;
            obj = null;

            //遍历ht，生成Session
            CreateSession(ht);
        }

        /**//// <summary>
        /// 以Soap方式反序列化
        /// </summary>
        private static void SoapDeserialize(string guid)
        ...{
            SessionEntity obj = new SessionEntity(guid);

            // 打开文件guid.xml
            Stream stream = File.Open(_ShareSessionPath + guid + ".xml", FileMode.Open);
            SoapFormatter formatter = new SoapFormatter();

            obj = (SessionEntity)formatter.Deserialize(stream);
            stream.Close();

            Hashtable ht = obj.HtShareSession;
            obj = null;

            //遍历ht，生成Session
            CreateSession(ht);
        }

        /**//// <summary>
        /// 遍历Hashtable，同时创建Session
        /// </summary>
        /// <param name="ht"></param>
        private static void CreateSession(Hashtable ht)
        ...{
            foreach (DictionaryEntry de in ht)
            ...{
                HttpContext.Current.Session[de.Key.ToString()] = de.Value;
            }
        }


    }//
}//

4、编译项目，生成ShareSession.dll

5、把ShareSession.dll引入Web Server 1上的应用程序中，同时在Web.config文件中增加配置字节

代码如下：


        <add key="ShareSessionPath" value="C:\ShareSession\"/>

6、在Web Server 1上的应用程序中新建一个页面，功能是初始化Session，然后把Session信息序列化，代码如下：

前台代码：

<%...@ Page Language="C#" AutoEventWireup="true" CodeFile="ShareSession.aspx.cs" Inherits="Front_Test_ShareSession" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Session共享</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:Label ID="lHttp_Cookie" runat="server" Text=""></asp:Label>
            <a href="http://localhost:5000/Front/Test/ShareSession.aspx?AUTH_GUID=<%=AUTH_GUID %>">Go Other Web Site(port:5000)</a>
        </div>
    </form>
</body>
</html>

后台代码：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Front_Test_ShareSession : System.Web.UI.Page
...{
    public string AUTH_GUID = "";

    protected void Page_Load(object sender, EventArgs e)
    ...{
        Session.Clear();
        Session.Abandon();
        Session.Add("USER_ID", "2002");
        Session.Add("USER_NAME", "Xiaojun Liu");

        ShareSession.ShareSessionFormatter.Serialize(ShareSession.ShareSessionFormatter.FormatterType.Soap);
        AUTH_GUID = Session["AUTH_GUID"].ToString();


    }
}

7、在Web Server 2上进行第5步操作

8、在Web Server 2上的应用程序中新建一个页面，功能是反序列化，还原Session，同时读取Session信息进行测试，代码如下：
--------------------编程问答--------------------
前台代码：

<%...@ Page Language="C#" AutoEventWireup="true" CodeFile="ShareSession.aspx.cs" Inherits="Front_Test_ShareSession" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Session共享</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:Label ID="lHttp_Cookie" runat="server" Text=""></asp:Label>
        </div>
    </form>
</body>
</html>

后台代码：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Front_Test_ShareSession : System.Web.UI.Page
...{
    protected void Page_Load(object sender, EventArgs e)
    ...{
        string guid = Request.Params["AUTH_GUID"].ToString();
        ShareSession.ShareSessionFormatter.Deserialize(ShareSession.ShareSessionFormatter.FormatterType.Soap,guid);

        Response.Write("USER_ID = "+Session["USER_ID"].ToString()+"<br />");
        Response.Write("USER_NAME = "+Session["USER_NAME"].ToString()+"<br />");
        Response.Write("AUTH_GUID = " + Session["AUTH_GUID"].ToString() + "<br />");
    }
}

此例子只是提供了一种解决思路，在应用过程中应根据项目不同进行调整及详细设计 --------------------编程问答-------------------- 大家快想想办法啊 --------------------编程问答-------------------- 站点a:session插入数据库
站点B:数据库中读取session

--------------------编程问答-------------------- 不懂HTML原理
不能跨站
点跨站的可以把登录信息用URL参数加密方式传过来，同时把登录信息放到session里就行了 --------------------编程问答-------------------- 大家再想想有没有好的办法可以实现的..... --------------------编程问答-------------------- 所有的页面都继承一个基类，该基类写一个虚page_load函数，获取传过来的值，给session赋值。
这个基类继承System.Web.UI.Page --------------------编程问答-------------------- Ranen2010  说的方法可行。session是不可以跨站的，必须自己代码处理。 --------------------编程问答-------------------- 还是将值存入数据库，另一个网站根据条件再去查出来了啊
不了解你这种需求的发生环境，感觉有种SSO的味道 --------------------编程问答--------------------

--------------------编程问答-------------------- IE认为夸站Seesion是不安全的 --------------------编程问答-------------------- 第一个站吧session传递过去，第二个站再新建session

补充：.NET技术 ,  ASP.NET