.net 后台发送http请求

需求是通过后台代码，发送http请求

//创建http的WebRequest

WebRequest request = WebRequest.Create("http://api.sms.ronghub.com/sendCode.json");
request.Method = "POST";
string postData = "mobile="+ mobile + "&templateId="+ Constant.TEMPLATE_REGISTER + "&region=86";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;

//这里增加需要的参数放在请求头里
request.Headers.Add("App-Key", Constant.APP_KEY);
request.Headers.Add("Nonce", Random);
request.Headers.Add("Timestamp", Timestamp);
request.Headers.Add("Signature", Signature);
Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();

//获取返回的response
WebResponse resp = request.GetResponse();
dataStream = resp.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();

//返回的结果转换成实体类

JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();
ReturnJson _ReturnJson = jsonSerializer.Deserialize<ReturnJson>(responseFromServer);

reader.Close();

dataStream.Close();
resp.Close();