获取网页数据

现在要做一个获取跟踪号的信息
跟踪号：RA081572108CN
网址为：http://17track.net/IndexEn.html?nums=RA081572108CN

现在的问题是：这个网站中的结果存放在一个框架中 <iframe id="frmResult" name="frmResult" scrolling="no" frameborder="0" src="Result.htm"></iframe>而我要获取的是Result.htm中的数据。

不知哪位高手可以帮助提供一下思路或者是代码，小弟我不胜感激。我主要用C#开发。

--------------------编程问答-------------------- 没有截获到和RA081572108CN相同的数据，我猜它在提交前一定对要查询的号做了相关加密的，你自己研究看看JS文件有没有结果

GET /Resources/Scripts/Zh_Cn/InfoState.js?ref=1303900166754 HTTP/1.1
Host: 17track.net
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: zh-cn,zh;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
X-Requested-With: XMLHttpRequest
Referer: http://17track.net/Result.htm
Cookie: __utma=103993024.1693448300.1303899609.1303899609.1303899609.1; __utmb=103993024.12.10.1303899609; __utmc=103993024; __utmz=103993024.1303899609.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); cnzz_a2909656=9; sin2909656=; rtime=0; ltime=1303900024137; cnzz_eid=91050212-1303899764-



HTTP/1.1 200 OK
Content-Length: 188
Content-Type: application/x-javascript
Content-Encoding: gzip
Last-Modified: Tue, 15 Mar 2011 06:54:10 GMT
Accept-Ranges: bytes
ETag: "0951dc9dde2cb1:526"
Vary: Accept-Encoding
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Date: Wed, 27 Apr 2011 10:31:39 GMT

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GET /Resources/Scripts/Zh_Cn/PackageState.js?ref=1303900166936 HTTP/1.1
Host: 17track.net
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: zh-cn,zh;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
X-Requested-With: XMLHttpRequest
Referer: http://17track.net/Result.htm
Cookie: __utma=103993024.1693448300.1303899609.1303899609.1303899609.1; __utmb=103993024.12.10.1303899609; __utmc=103993024; __utmz=103993024.1303899609.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); cnzz_a2909656=9; sin2909656=; rtime=0; ltime=1303900024137; cnzz_eid=91050212-1303899764-



HTTP/1.1 200 OK
Content-Length: 123
Content-Type: application/x-javascript
Content-Encoding: gzip
Last-Modified: Fri, 21 Jan 2011 08:02:18 GMT
Accept-Ranges: bytes
ETag: "021dc8541b9cb1:526"
Vary: Accept-Encoding
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Date: Wed, 27 Apr 2011 10:31:39 GMT

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GET /Resources/Scripts/Zh_Cn/CommonRes.js?ref=1303900167029 HTTP/1.1
Host: 17track.net
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: zh-cn,zh;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
X-Requested-With: XMLHttpRequest
Referer: http://17track.net/Result.htm
Cookie: __utma=103993024.1693448300.1303899609.1303899609.1303899609.1; __utmb=103993024.12.10.1303899609; __utmc=103993024; __utmz=103993024.1303899609.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); cnzz_a2909656=9; sin2909656=; rtime=0; ltime=1303900024137; cnzz_eid=91050212-1303899764-



HTTP/1.1 200 OK
Content-Length: 1072
Content-Type: application/x-javascript
Content-Encoding: gzip
Last-Modified: Wed, 13 Apr 2011 06:11:46 GMT
Accept-Ranges: bytes
ETag: "0bdc0aaa1f9cb1:526"
Vary: Accept-Encoding
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Date: Wed, 27 Apr 2011 10:31:39 GMT

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POST /Code/Actions/GetResults.ashx?ref=1303900167266 HTTP/1.1
Host: 17track.net
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16
Accept: */*
Accept-Language: zh-cn,zh;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Referer: http://17track.net/Result.htm
Content-Length: 31
Cookie: __utma=103993024.1693448300.1303899609.1303899609.1303899609.1; __utmb=103993024.12.10.1303899609; __utmc=103993024; __utmz=103993024.1303899609.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); cnzz_a2909656=9; sin2909656=; rtime=0; ltime=1303900024137; cnzz_eid=91050212-1303899764-
Pragma: no-cache
Cache-Control: no-cache

number=UkEwODE1NzIxMDhDTg%3D%3D
--------------------编程问答-------------------- 用WebBrowser控件加载你所需要的页面

在获取页面你所需要的数据，这个是最快的了，不用去分析它那些加密的东西

所见即所得 --------------------编程问答-------------------- 不是，加密，是压缩了一下。

请求的时候不要发送 Accept-Encoding: gzip。。。 --------------------编程问答-------------------- 如楼上所说，是压缩的。
Accept-Encoding: gzip,deflate --------------------编程问答-------------------- 参数跟返回都做了加密,明摆着就是要防止采集的哦.
JS也做了混淆,可以说是用心良苦啊.

补充：.NET技术 ,  C#