获得从HTML页面登录背后 [英] Getting HTML from a page behind a login

问题描述

这个问题是一个跟进到我的 previous问题有关从ASPX页面获取HTML。我决定用WebClient的对象来尝试，但问题是，我得到的登录页面的HTML，因为需要登录。我试图在登录使用WebClient的对象：

This question is a follow up to my previous question about getting the HTML from an ASPX page. I decided to try using the webclient object, but the problem is that I get the login page's HTML because login is required. I tried "logging in" using the webclient object:

WebClient ww = new WebClient();

 ww.DownloadString("Login.aspx?UserName=&Password=");

 string html = ww.DownloadString("Internal.aspx");

但我仍然获得登录页面的所有时间。我知道的用户名信息不是存储在cookie中。我必须做一些错误或遗漏的重要组成部分。有谁知道这可能是什么？

But I still get the login page all the time. I know that the username info is not stored in a cookie. I must be doing something wrong or leaving out an important part. Does anyone know what it could be?

推荐答案

只是通过有效的登录参数给定的URI。如果您排忧解难。

Just pass valid login parameters to a given URI. Should help you out.

如果您没有登录，你不应该试图绕过它的信息。

public static string HttpPost( string URI, string Parameters )
      {
         System.Net.WebRequest req = System.Net.WebRequest.Create( URI );
         req.ContentType = "application/x-www-form-urlencoded";
         req.Method = "POST";
         byte[] bytes = System.Text.Encoding.ASCII.GetBytes( Parameters );
         req.ContentLength = bytes.Length;
         System.IO.Stream os = req.GetRequestStream();
         os.Write( bytes, 0, bytes.Length );
         os.Close();
         System.Net.WebResponse resp = req.GetResponse();
         if ( resp == null ) return null;
         System.IO.StreamReader sr = new System.IO.StreamReader( resp.GetResponseStream() );
         return sr.ReadToEnd().Trim();
      }

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