.net/C# HttpWebRequest传送与接收参数

public string PostData(string url, string data)//url：要发送到网站的地址   data：传送需要的参数  
{  
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);  
myRequest.Method = "POST";  
myRequest.ContentType = "application/x-www-form-urlencoded";  
myRequest.ContentLength = data.Length;  
Stream newStream = myRequest.GetRequestStream();  
// Send the data.   
ASCIIEncoding encoding = new ASCIIEncoding();  
byte[] postdata = encoding.GetBytes(data);  
newStream.Write(postdata, 0, data.Length);  
newStream.Close();  
// Get response   
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();  
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.GetEncoding("gb2312"));  
string content = reader.ReadToEnd();//得到结果   
  
return content; 

GET方法：

 Uri uri = new Uri(url + "?" + postData);  
            System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(uri);  
            request.Method = "GET";  
            request.ContentType = "application/x-www-form-urlencoded";  
            request.AllowAutoRedirect = false;  
            request.Timeout = 5000;  
            System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();  
            Stream responseStream = response.GetResponseStream();  
            StreamReader readStream = new StreamReader(responseStream, System.Text.Encoding.UTF8);  
            string retext = readStream.ReadToEnd().ToString();  
            readStream.Close();  
            return retext;  
  
}