需要在WinForm里调用一个url发送短信，为了防止自己忘记，特将HttpWebRequest的使用方法摘录如下：

 1        public void SendSms(string phoneNumber, string text)
 2        {
 3            string url;
 4            url = string.Format(@"http://a.b.c.d/path/?user=username&password=password&phonenumber={0}&text={1}&charset=gb2312", phoneNumber, HttpUtility.UrlEncode(text));
 5
 6            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
 7
 8            request.MaximumResponseHeadersLength = 10240;
 9            request.Credentials = CredentialCache.DefaultCredentials;
10            request.Method = "GET";
11            request.Timeout = 60000;
12            WebResponse webRep = request.GetResponse();
13
14            Debug.WriteLine(webRep.Headers.ToString());
15            Debug.WriteLine(webRep.ResponseUri.OriginalString);
16
17            读取网页内容/不需要
43
44            // Release the resources of response object.
45            webRep.Close();
46
47        }