1. using
2. using
3. using
4. using
5. using
6. using
7. using
8. using
9.   
10. using
11. using
12. using
13. using
14.   
15. namespace
16. {  
17. public  partial  class
18.     {  
19. new
20. string
21.   
22. public
23.         {  
24.             InitializeComponent();  
25.         }  
26.   
27. private   void  Form1_Load( object
28.         {  
29. // 读取登录页面，获取 VIEWSTATE 及 Cookies
30. byte [] bs = getBytesstring
31. "id=/"__VIEWSTATE/" value=/"" ;                       // viewState 的开始字符串
32. int
33. int  end = html.IndexOf( "/""
34. // 获取 viewState
35.   
36. // 读取图片校验码并显示图片
37. , cc,  null
38. new
39. new
40. // 显示图片验证码
41.             ms.Close();  
42.         }  
43.   
44. // 更新图片验证码
45. private   void  pictureBox1_DoubleClick( object
46.         {  
47. byte [] bs = getBytes , cc,  null
48. new
49. new
50. // 更新图片验证码(可能看不清楚)
51.             ms.Close();  
52.         }  
53.   
54. // 显示 Cookies 信息
55. private   void  button3_Click( object
56.         {  
57. new
58. new  Uri(foreach  (Cookie c  in
59.             {  
60. " --> "
61.             }  
62.             richTextBox1.Text = sb.ToString();  
63. " Bytes"
64.         }  
65.   
66. // 用户登录
67. private   void  btnLogin_Click( object
68.         {  
69. try
70.             {  
71. string  userName = txtUser.Text;                              // 获取用户名
72. string  userPwd = txtPassword.Text;                           // 获取口令
73. string  Verify = txtVerify.Text;                              // 获取验证码
74. string  postData =  "__VIEWSTATE="  + HttpUtility.UrlEncode(viewState) +  "&ctl00$CPH_Content$tb_LoginNameOrLoginEmail="  + userName +  "&ctl00$CPH_Content$tb_Password="  + userPwd +  "&ctl00$CPH_Content$tb_ExPwd="  + Verify +  "&ctl00$CPH_Content$Image_Login.x=16&ctl00$CPH_Content$Image_Login.y=17" ;   //&from=";
75. byte [] buffer = Encoding.Default.GetBytes(postData);         // 要发送的数据
76. string  html = Encoding.UTF8.GetString(buffer);               // 获取返回的页面内容
77.   
78. if  (html.IndexOf( "您好，您已经成功登录。"
79.                 {  
80. "你已成功登录 CSDN"
81.                 }  
82. else
83.                 {  
84. "登录 CSDN 失败！"
85.                 }  
86.             }  
87. catch
88.             {  
89.                 MessageBox.Show(Err.Message);  
90.             }  
91.         }  
92.   
93. // 读取网络资源，返回字节数组
94. private   static   byte [] getBytes( string  url, CookieContainer cookie,  byte
95.         {  
96. int  c = url.IndexOf( "/"
97. byte [] data =  null
98.             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);  
99.             request.CookieContainer = cookie;  
100.             request.Referer = (c > 0 ? url.Substring(0, c) : url);  
101. "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"
102. "gzip, deflate"
103.   
104. if  (postData !=  null )                                            // 需要 Post 数据
105.             {  
106. "POST"
107. "application/x-www-form-urlencoded"
108.                 request.ContentLength = postData.Length;  
109.                 Stream requestStream = request.GetRequestStream();  
110.                 requestStream.Write(postData, 0, postData.Length);  
111.                 requestStream.Close();  
112.             }  
113.   
114.             HttpWebResponse response = (HttpWebResponse)request.GetResponse();  
115. string
116. int  ContentLength = ( int
117.             Stream s = response.GetResponseStream();  
118.             c = 1024 * 10;  
119. if  (ContentLength < 0)                                           // 不能获取数据的长度
120.             {  
121. new   byte
122. new
123. int
124. while
125.                 {  
126.                     ms.Write(data, 0, l);  
127.                     l = s.Read(data, 0, c);  
128.                 }  
129.                 data = ms.ToArray();  
130.                 ms.Close();  
131.             }  
132. else                                                              // 数据长度已知
133.             {  
134. new   byte
135. int
136. while
137.                 {  
138. int
139.                     pos += l;  
140.                     ContentLength -= l;  
141.                 }  
142.             }  
143.             s.Close();  
144.             response.Close();  
145.   
146. if  (ce ==  "gzip" )                                                // 若数据是压缩格式，则要进行解压
147.             {  
148. new  MemoryStream();                        // 解压后的流   
149. new  MemoryStream(data);                    // 用于解压的流   
150. new
151. byte [] buffer =  new   byte [c];                                 // 读数据缓冲区      
152. int  l = g.Read(buffer, 0, c);                                // 一次读 10K      
153. while
154.                 {  
155.                     js.Write(buffer, 0, l);  
156.                     l = g.Read(buffer, 0, c);  
157.                 }  
158.                 g.Close();  
159.                 ms.Close();  
160.                 data = js.ToArray();  
161.                 js.Close();  
162.             }  
163. return  data;                                                     // 返回字节数组
164.         }  
165.     }  
166. }