1 　　　　　public static HttpWebResponse Post(string urlStr, string param)
 2         {
 3             HttpWebRequest request=null;
 4             HttpWebResponse response = null;
 5             try
 6             {
 7                 //创建一个HTTP请求
 8                 request = (HttpWebRequest)WebRequest.Create(urlStr);
 9                 //request.Timeout = 30000;
10                 //Post请求方式
11                 request.Method = "POST";
12                 //内容类型
13                 request.ContentType = "application/x-www-form-urlencoded";
14 
15                 //将URL编码后的字符串转化为字节
16                 byte[] payload = System.Text.Encoding.UTF8.GetBytes(param);
17                 //设置请求的ContentLength 
18                 request.ContentLength = payload.Length;
19                 //获得请求流
20                 Stream writer = request.GetRequestStream();
21                 //将请求参数写入流
22                 writer.Write(payload, 0, payload.Length);
23                 //关闭请求流
24                 writer.Close();
25 
26                 //发送HttpWebRequest请求，得到HttpWebResponse对象
27                 response = (HttpWebResponse)request.GetResponse();
28             }
29             catch (Exception e)
30             {
31                 throw e;
32             }
33 
34             return response;
35         }