1 private void Form1_Load(object sender, EventArgs e)
 2         {
 3             string str;
 4             string postData;
 5             postData = "user=106042108&pass=6283****21713&ip=172.20.15.210&type=2&action=%C1%AC%BD%D3%CD%F8%C2%E7";
 6             str=SendMsg(postData);
 7             textBox1.Text = str;
 8         }
 9         public string SendMsg(string postData)
10         {  
11                 string url = "http://121.195.254.46/index.jsp";
12                 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
13                 request.Method = "POST";
14                 request.Accept = "image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";
15                 request.Referer = "http://121.195.254.46/index.jsp";
16                 request.AllowAutoRedirect = true;
17                 request.KeepAlive = true;
18                 request.SendChunked = true;
19                 request.ContentType = "text/html;charset=gb2312;";
20                 request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)";
21                 request.ContentType = "application/x-www-form-urlencoded";
22                 request.KeepAlive = true;
23                 request.Headers.Add("Accept-Encoding", "gzip, deflate");
24                 byte[] data = Encoding.GetEncoding("GB2312").GetBytes(postData);
25                 request.ContentLength = data.Length;
26                 MessageBox.Show(Convert .ToString(data.Length));
27                 Stream stream = request.GetRequestStream();
28                 stream.Write(data, 0, data.Length);
29                 stream.Close();
30                 HttpWebResponse response = (HttpWebResponse)request.GetResponse();
31                 StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("GB2312"));
32                 string s = sr.ReadToEnd();
33                 response.Close();
34                 return s;
35          }