■■■■HttpWebRequest的问题 Session丢失。。在线等 急急急！！！

[zhu18]

//1.aspx 
protected void Page_Load(object sender, EventArgs e)
    {
        //给会话添加一项
        Session.Add("ss", "ttttt");
        //请求2.aspx得到HTML
        string s = HttpWebResponsePost("http://localhost:1155/Web/2.aspx", "", "utf-8");        
        Response.Write(s);
    }

public static string HttpWebResponsePost(string url, string postData, string encodeType)
    {

        Stream outstream = null;
        Stream instream = null;
        StreamReader sr = null;
        HttpWebResponse response = null;
        HttpWebRequest request = null;
        Encoding encoding = Encoding.GetEncoding(encodeType);
        byte[] data = encoding.GetBytes(postData);

        try
        {
            request = WebRequest.Create(url) as HttpWebRequest;
            CookieContainer cookieContainer = new CookieContainer();
            request.CookieContainer = cookieContainer;
            request.AllowAutoRedirect = true;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = data.Length;
            outstream = request.GetRequestStream();
            outstream.Write(data, 0, data.Length);
            outstream.Close();
            response = request.GetResponse() as HttpWebResponse;
            instream = response.GetResponseStream();
            sr = new StreamReader(instream, encoding);
            string content = sr.ReadToEnd();
            return content;
        }
        catch (Exception ex)
        {
           return string.Empty;
        }
    } 



//被请求的2.aspx
protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write("request page... Session Count:"+Session.Count);
    }

结果："request page... Session Count：0"

说明这他们不在一个会话中 有什么办法让他们在一个会话中 共享Session

[zhu18]

TO:jiangzhe556
2.aspx一直就没有被打开过，是1.aspx在服务器端请求并返回2.aspx所生成HTML而已啊

[brood108]

得到的结果肯定是 Session Count:0

你这么做 原理是这样的：

首先你请求1.aspx 同时赋了session
然后你调函数访问2.aspx 这一步相当于你在一个全新的ie里打开2.aspx
这一步跟你之前的不在一个ie线程内自然不会共享session 所以是0啦
解决方法，你可以给你的函数增加一个参数 sessionstr
然后给httpwebrequest指定session
这样的话可以欺骗2.aspx让他带上指定session

[zhu18]

request.CookieContainer = cookieContainer;
请教：这个属性就没有用吗，他不能帮我解决这个问题吗。
再次谢谢大家热心帮助。。

[brood108]

CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
string cookie="ASP.NET_SessionId=spz5yqj0yqtilqftkl5tta3i";
request.CookieContainer.SetCookies(new Uri(url), cookie)

你这样才能给请求赋上session
但是因为session每次都是.net自动随机加密的
所以你要先用函数请求1.aspx 然后
outcookieheader = req.CookieContainer.GetCookieHeader(new Uri(url))

这样就取得了1.aspx输出的cookie
请求2.aspx的时候 在用我上面的方法带上cookie就可以了

[路人乙e]

webrequest访问等于使用另一用户第一次打开网站
结果就是一切数据都是初始状态

[brood108]

//1.aspx 
protected void Page_Load(object sender, EventArgs e)
    {
        //给会话添加一项
        Session.Add("ss", "ttttt");
        //请求2.aspx得到HTML
        string s = HttpWebResponsePost("http://localhost:1155/Web/2.aspx", "", "utf-8");        
        Response.Write(s);
    }
//2.aspx
protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write("request page... Session Count:"+Session.Count);
        Response.Write("<br>Session[\"ss\"]="+session["ss"].ToString();
    }

//3.aspx 
protected void Page_Load(object sender, EventArgs e)
    {
        //请求3.aspx得到HTML
        string cookie="";
        string outcookie="";
        string s1 = HttpWebResponsePost("http://localhost:1155/Web/1.aspx", "", "utf-8",cookie,out  outcookie);
        string cookie2=outcookie;
        string s2 = HttpWebResponsePost("http://localhost:1155/Web/2.aspx", "", "utf-8",cookie2,outcookie);        
        Response.Write(s2);
    }

public static string HttpWebResponsePost(string url, string postData, string encodeType ,string cookie, out string outcookie)
    {

        Stream outstream = null;
        Stream instream = null;
        StreamReader sr = null;
        HttpWebResponse response = null;
        HttpWebRequest request = null;
        Encoding encoding = Encoding.GetEncoding(encodeType);
        byte[] data = encoding.GetBytes(postData);

        try
        {
            request = WebRequest.Create(url) as HttpWebRequest;
            CookieContainer cookieContainer = new CookieContainer();
            request.CookieContainer = cookieContainer;
            if(cookie != "")
            {
                 request.CookieContainer.SetCookies(new Uri(url), cookie) 
            }
            request.AllowAutoRedirect = true;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = data.Length;
            outstream = request.GetRequestStream();

            outcookie = request.CookieContainer.GetCookieHeader(new Uri(url))

            outstream.Write(data, 0, data.Length);
            outstream.Close();
            response = request.GetResponse() as HttpWebResponse;
            instream = response.GetResponseStream();
            sr = new StreamReader(instream, encoding);
            string content = sr.ReadToEnd();
            return content;
        }
        catch (Exception ex)
        {
           return string.Empty;
        }
    } 

[brood108]

上边那个有点问题 这次应该就对了
你直接请求3.aspx 查看效果

//1.aspx 
protected void Page_Load(object sender, EventArgs e)
    {
        //给会话添加一项
        Session.Add("ss", "ttttt");
    }
//2.aspx
protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write("request page... Session Count:"+Session.Count);
        Response.Write("<br>Session[\"ss\"]="+session["ss"].ToString();
    }

//3.aspx 
protected void Page_Load(object sender, EventArgs e)
    {
        //请求3.aspx得到HTML
        string cookie="";
        string outcookie="";
        string s1 = HttpWebResponsePost("http://localhost:1155/Web/1.aspx", "", "utf-8",cookie,out  outcookie);
        string cookie2=outcookie;
        string s2 = HttpWebResponsePost("http://localhost:1155/Web/2.aspx", "", "utf-8",cookie2,outcookie);        
        Response.Write(s2);
    }

public static string HttpWebResponsePost(string url, string postData, string encodeType ,string cookie, out string outcookie)
    {

        Stream outstream = null;
        Stream instream = null;
        StreamReader sr = null;
        HttpWebResponse response = null;
        HttpWebRequest request = null;
        Encoding encoding = Encoding.GetEncoding(encodeType);
        byte[] data = encoding.GetBytes(postData);

        try
        {
            request = WebRequest.Create(url) as HttpWebRequest;
            CookieContainer cookieContainer = new CookieContainer();
            request.CookieContainer = cookieContainer;
            if(cookie != "")
            {
                 request.CookieContainer.SetCookies(new Uri(url), cookie) 
            }
            request.AllowAutoRedirect = true;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = data.Length;
            outstream = request.GetRequestStream();

            outcookie = request.CookieContainer.GetCookieHeader(new Uri(url))

            outstream.Write(data, 0, data.Length);
            outstream.Close();
            response = request.GetResponse() as HttpWebResponse;
            instream = response.GetResponseStream();
            sr = new StreamReader(instream, encoding);
            string content = sr.ReadToEnd();
            return content;
        }
        catch (Exception ex)
        {
           return string.Empty;
        }
    } 

[zhu18]

好像还不行 Session.Count=0

[zhu18]

TO:brood108
我的3个页面是这样的 有什么问题吗 Session还是0

//1.aspx
    protected void Page_Load(object sender, EventArgs e)
    {
        //给会话添加一项
        Session.Add("ss", "ttttt");
    }
//2.aspx
 protected void Page_Load(object sender, EventArgs e)
    {
        Response.Write("request page... Session Count:"+Session.Count);
        if (Session["ss"]!=null)
            Response.Write("<br>Session[\"ss\"]="+Session["ss"].ToString());
    }
//3.aspx
 protected void Page_Load(object sender, EventArgs e)
    {
        //请求3.aspx得到HTML
        string cookie = "";
        string outcookie = "";
        string s1 = HttpWebResponsePost("http://localhost:4455/DDD/1.aspx", "", "utf-8", cookie, out  outcookie);
        string cookie2 = outcookie;
        string s2 = HttpWebResponsePost("http://localhost:4455/DDD/2.aspx", "", "utf-8", cookie2, out cookie);
        Response.Write(s2);
    }

    public static string HttpWebResponsePost(string url, string postData, string encodeType, string cookie, out string outcookie)
    {

        Stream outstream = null;
        Stream instream = null;
        StreamReader sr = null;
        HttpWebResponse response = null;
        HttpWebRequest request = null;
        Encoding encoding = Encoding.GetEncoding(encodeType);
        byte[] data = encoding.GetBytes(postData);

        try
        {
            request = WebRequest.Create(url) as HttpWebRequest;
            CookieContainer cookieContainer = new CookieContainer();
            request.CookieContainer = cookieContainer;
            if(cookie != "")
            {
                request.CookieContainer.SetCookies(new Uri(url), cookie);
            }
            request.AllowAutoRedirect = true;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = data.Length;
            outstream = request.GetRequestStream();

            outcookie = request.CookieContainer.GetCookieHeader(new Uri(url));

            outstream.Write(data, 0, data.Length);
            outstream.Close();
            response = request.GetResponse() as HttpWebResponse;
            instream = response.GetResponseStream();
            sr = new StreamReader(instream, encoding);
            string content = sr.ReadToEnd();
            return content;
        }
        catch (Exception ex)
        {
            outcookie = "";
           return string.Empty;
        }
    } 

[brood108]

string cookie2=outcookie;

这个得到的的cookie2 是空的吗？

[brood108]

哈哈 不好意思啊 outcookie的位置写错了
感觉不会有问题 所以没有调试
现在调试了一下 果然发现写错了
这次调试了一下 没问题了！ 正确的应该是这样

public static string HttpWebResponsePost(string url, string postData, string encodeType, string cookie, out string outcookie)
        {

            Stream outstream = null;
            Stream instream = null;
            StreamReader sr = null;
            HttpWebResponse response = null;
            HttpWebRequest request = null;
            Encoding encoding = Encoding.GetEncoding(encodeType);
            byte[] data = encoding.GetBytes(postData);

            try
            {
                request = WebRequest.Create(url) as HttpWebRequest;
                CookieContainer cookieContainer = new CookieContainer();
                request.CookieContainer = cookieContainer;
                if (cookie != "")
                {
                    request.CookieContainer.SetCookies(new Uri(url), cookie);
                }
                request.AllowAutoRedirect = true;
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = data.Length;
                outstream = request.GetRequestStream();    
                outstream.Write(data, 0, data.Length);
                outstream.Close();
                response = request.GetResponse() as HttpWebResponse;
                instream = response.GetResponseStream();

                outcookie = request.CookieContainer.GetCookieHeader(new Uri(url));

                sr = new StreamReader(instream, encoding);
                string content = sr.ReadToEnd();
                return content;
            }
            catch (Exception ex)
            {
                outcookie = "";
                return string.Empty;
            }
        } 

[zhu18]

To:brood108
cookie2 不是空 是cookie = "ddd";最开始设置的值。

我最终想实现
1.aspx页面中Session添加一项，然后去请求2.aspx
想在被请求的2.aspx中得到1.aspx添加的Session的值, 要求使用Session对象。

这样可以吗...

[zhu18]

日 你真强
看到效果了 我先体会下你代码
请稍等下 。。。

[brood108]

原理是这样的
instream = response.GetResponseStream();
这一步请求之后，页面才被真正的请求 这个时候才被赋session
所以outcookie应该在这一步获取才能取到值

我之前获取的时候，获取的位置错了，页面还没有被请求，当然得到的是空啦

[zhu18]

说真话 我没有理解你的代码;我改了下就想2个页面简单点，不知道为什么不行。能不能具体帮我解释下，
我真心谢谢你。

//1.aspx [把3.aspx的代码放到1来了]
 protected void Page_Load(object sender, EventArgs e)
    {
        //给会话添加一项
        Session.Add("ss", "ttttt");
        string cookie = "";
        string outcookie = "";       
        string s2 = HttpWebResponsePost("http://localhost:4455/DDD/2.aspx", "", "utf-8", cookie, out outcookie);        
        Response.Write(s2);
    }

    public static string HttpWebResponsePost(string url, string postData, string encodeType, string cookie, out string outcookie)
    {

        Stream outstream = null;
        Stream instream = null;
        StreamReader sr = null;
        HttpWebResponse response = null;
        HttpWebRequest request = null;
        Encoding encoding = Encoding.GetEncoding(encodeType);
        byte[] data = encoding.GetBytes(postData);

        try
        {
            request = WebRequest.Create(url) as HttpWebRequest;
            CookieContainer cookieContainer = new CookieContainer();
            request.CookieContainer = cookieContainer;
            if (cookie != "")
            {
                request.CookieContainer.SetCookies(new Uri(url), cookie);
            }
            request.AllowAutoRedirect = true;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = data.Length;
            outstream = request.GetRequestStream();
            outstream.Write(data, 0, data.Length);
            outstream.Close();
            response = request.GetResponse() as HttpWebResponse;
            instream = response.GetResponseStream();

            outcookie = request.CookieContainer.GetCookieHeader(new Uri(url));

            sr = new StreamReader(instream, encoding);
            string content = sr.ReadToEnd();
            return content;
        }
        catch (Exception ex)
        {
            outcookie = "";
            return string.Empty;
        }
    } 
//2.aspx代码不变

[brood108]

这里的cookie 其实存的就是session

请求第一个页面的时候 得到cookie 请求第2个页面的时候，需要赋上cookie
这其实是模拟http协议的同一个线程先后请求页面

不管几个页面，你请求第2个页面的时候 cookie如果是空，就等于session是空
你需要请求第2个页面的时候 给cookie赋值的

[gang027]

up

[zhu18]

虽然我很傻，我一定要看懂，
TO:brood108
你能告诉我你QQ吗 或你的QQ群，谢谢你了

来这里也把分接了
http://topic.csdn.net/u/20081120/09/176f246b-8089-426c-8020-5580c8012456.html?seed=2004610552

[yagebu1983]

试试别的页面缓存!!

[qq254242213]

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