Post请求：

1    string postData = "user=123&pass=456"; // 要发放的数据  2    byte[] byteArray = Encoding.UTF8.GetBytes(postData); 3  4    HttpWebRequest objWebRequest = (HttpWebRequest)WebRequest.Create("http://www.abc.com/a.aspx"); 5    objWebRequest.Method = "POST"; 6    objWebRequest.ContentType = "application/x-www-form-urlencoded"; 7    objWebRequest.ContentLength = byteArray.Length; 8    Stream newStream = objWebRequest.GetRequestStream(); 9    // Send the data. 10    newStream.Write(byteArray, 0, byteArray.Length); //写入参数 11    newStream.Close();12 13    HttpWebResponse response = (HttpWebResponse)objWebRequest.GetResponse();14    StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);15    string textResponse = sr.ReadToEnd(); // 返回的数据

 

接收参数：string a= Request.Form["user"];