用C#向表单提交数据并且得到返回页面代码

1. try
2. {
3. stringuriString="表单地址";
4. WebClientmyWebClient=newWebClient();
5. stringpostData="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. stringresp=System.Text.Encoding.GetEncoding("gb2312").GetString(responseArray);
11. textBox1.Text=resp;
12. }
13. catch(Exceptionex)
14. {
15. MessageBox.Show(ex.Message);
16. }