用C#向表單提交數據並且得到返回頁面代碼

1. try  
2.             {   
3.                 string uriString = "表單地址";   
4.                 WebClient myWebClient = new WebClient();   
5.                 string postData = "subject=aaaaa&message=bbbbbbb&formhash=91e2aabd";   
6.                 myWebClient.Headers.Add("Content-Type","application/x-www-form-urlencoded");   
7.                 myWebClient.Headers.Add("Cookie","cdb_sid=nNvaG8; cdb_cookietime=2592000;cdb_auth=UVMEAVcABlpWVQZVUwxTVQwFXAoMVAgEUQMKUQUFAgtqawc;");   
8.                 byte[] byteArray = System.Text.Encoding.ASCII.GetBytes(postData);;   
9.                 byte[] responseArray = myWebClient.UploadData(uriString,"POST",byteArray);   
10.                 string resp = System.Text.Encoding.GetEncoding("gb2312").GetString(responseArray);   
11.                 textBox1.Text = resp;   
12.             }   
13.             catch(Exception ex)   
14.             {   
15.                 MessageBox.Show(ex.Message);   
16.             }