菜鸟求教高人：我用下面这段代码虚拟登陆，可是得不到登陆后的页面源代码，请帮忙看看是怎么回事，感激不尽！

[hihijerry]

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Web;

namespace login
{
class Program
{
static void Main(string[] args)
{
string username = "jyytju04";
string password = "123456";

string postdata = "username=" + username + "&loginfield=username&password=" + password + "&loginsubmit=%E7%99%BB%E5%BD%95";
ASCIIEncoding encoding = new ASCIIEncoding();
//string postdata = "formhash=a0cfd704&referer=&loginfield=username&username=jyytju04&password=123456&questionid=0&answer=&cookietime=2592000&loginmode=&styleid=&loginsubmit=%E6%8F%90%E4%BA%A4";
string postData = postdata;
//postData += ("&Accept=" + strsubmit);
byte[] data = encoding.GetBytes(postData);
// Prepare web request...
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("http://bbs.ifeng.com/loggingutf8.php?action=login");
myRequest.Method = "POST";
myRequest.ContentType = "application/x-www-form-urlencoded";
myRequest.ContentLength = data.Length;
Stream newStream = myRequest.GetRequestStream();
// Send the data.
newStream.Write(data, 0, data.Length);
newStream.Close();
// Get response
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
string content = reader.ReadToEnd();
//Response.Write(content) ;
Console.WriteLine(content);
Console.ReadLine();
reader.Close();
}
}
}

[wenbin]

出现的因素可能比较多，先找个监视工具，看下post的时候都有哪些数据，格式，
一些设置等。

[mjjzg]

对这个问题不是很清楚
帮你顶一下，以表支持

[MicroDeviser]

看看正常登陆后的内容有些什么没有

[leebo123]

呵呵 这个问题我原来也遇到过 登录网页需要传递cookies才能保持登录的状态 所以你要把cookies保存起来 我给你一点示例

  private bool   PostWebRequest()        
              {
                    CookieContainer cc = new CookieContainer(); //建立保存cookies的容器
                     string pos tData = "user=" + strUser + "&pass=" + strPsd;
                     byte[] byteArray = Encoding.UTF8.GetBytes(postData); 

                     HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create(new Uri("/chk.asp"));
                     webRequest2.CookieContainer = cc; //设置cookies
                     webRequest2.Method = "POST";
                     webRequest2.ContentType = "application/x-www-form-urlencoded";
                     webRequest2.ContentLength = byteArray.Length;
                     Stream newStream = webRequest2.GetRequestStream(); 
                     // Send the data.
                     newStream.Write(byteArray, 0, byteArray.Length);     //写入参数
                     newStream.Close(); 

                     HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();
                     StreamReader sr2=new StreamReader(response2.GetResponseStream(), Encoding.Default);
                     string text2 =   sr2.ReadToEnd();
                   ......
         }

当然 你如果在打开其他页面的时候也要把这个cookies加上 这样就可以保持登录状态了 就好比登录论坛

[pvgyetg]

友情UP

[DavidNoWay]

mark

[whitechololate]

传那么多参数！~
帮顶~

[D13ay]

帮顶