用C#向表单提交数据并且得到返回页面代码

try

{

string uriString = "表单地址";

WebClient myWebClient = new WebClient();

string postData = "subject=aaaaa&message=bbbbbbb&formhash=91e2aabd";

myWebClient.Headers.Add("Content-Type","application/x-www-form-urlencoded");

myWebClient.Headers.Add("Cookie","cdb_sid=nNvaG8; cdb_cookietime=2592000;cdb_auth=UVMEAVcABlpWVQZVUwxTVQwFXAoMVAgEUQMKUQUFAgtqawc;");

byte[] byteArray = System.Text.Encoding.ASCII.GetBytes(postData);;

byte[] responseArray = myWebClient.UploadData(uriString,"POST",byteArray);

string resp = System.Text.Encoding.GetEncoding("gb2312").GetString(responseArray);

textBox1.Text = resp;

}

catch(Exception ex)

{

MessageBox.Show(ex.Message);

}