using HttpWebRequest
using System.IO

/// <summary>
/// 發(fā)送GET請求
/// </summary>
/// <param name="url">請求URL，如果需要傳參，在URL末尾加上“？+參數名=參數值”即可</param>
/// <returns></returns>
static string HttpGet(string url)
{
  //創(chuàng)建
  HttpWebRequest httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
  //設置請求方法
  httpWebRequest.Method = "GET";
  //請求超時時間
  httpWebRequest.Timeout = 20000;
  //發(fā)送請求
  HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
  //利用Stream流讀取返回數據
  StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream(), Encoding.UTF8);
  //獲得最終數據，一般是json
  string responseContent = streamReader.ReadToEnd();
  streamReader.Close();
  httpWebResponse.Close();
  return responseContent;
}

/// <summary>
/// 發(fā)送POST請求
/// </summary>
/// <param name="url">請求URL</param>
/// <param name="data">請求參數</param>
/// <returns></returns>
static string HttpPost(string url, string data)
{
  HttpWebRequest httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
  //字符串轉換為字節(jié)碼
  byte[] bs = Encoding.UTF8.GetBytes(data);
  //參數類型，這里是json類型
  //還有別的類型如"application/x-www-form-urlencoded"，不過我沒用過(逃
  httpWebRequest.ContentType = "application/json";
  //參數數據長度
  httpWebRequest.ContentLength = bs.Length;
  //設置請求類型
  httpWebRequest.Method = "POST";
  //設置超時時間
  httpWebRequest.Timeout = 20000;
  //將參數寫入請求地址中
  httpWebRequest.GetRequestStream().Write(bs, 0, bs.Length);
  //發(fā)送請求
  HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
  //讀取返回數據
  StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream(), Encoding.UTF8);
  string responseContent = streamReader.ReadToEnd();
  streamReader.Close();
  httpWebResponse.Close();
  httpWebRequest.Abort();
  return responseContent;
}

httpWebRequest.GetRequestStream().Write(bs, 0, bs.Length);