C#get ,post

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(1)get  

發送url請求

佈建要求方式

佈建要求內容格式

獲得回應對象，接收流

讀取流

  private string Get(string url)        {            string all = string.Empty;            //發送請求            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;            request.Method = "get";//設定方法            request.ContentType = "text/html;charset=UTF-8";            //獲得響應            HttpWebResponse response = (HttpWebResponse)request.GetResponse();            //讀取流            Stream stream = response.GetResponseStream();            StreamReader sr = new StreamReader(stream, Encoding.UTF8);            all= sr.ReadToEnd();            //關閉流            stream.Close();            sr.Close();            return all;        }

(2)post

發送url請求

佈建要求方式

佈建要求內容格式

佈建要求內容長度（可以不設定）（長度是byte數組的長度，不是string類型的長度）

將post資料添加到請求流中（重中之重GetRequestStream()）

接收回應對象，接收流

讀取流

 

 public static string Post(string postdata, string url)        {            HttpWebResponse hw;            string result = string.Empty;            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);            req.Method = "POST";            req.ContentType = "application/json";            #region 添加Post 參數              byte[] data = Encoding.UTF8.GetBytes(postdata);            req.ContentLength = data.Length;            using (Stream reqStream = req.GetRequestStream())            {                reqStream.Write(data, 0, data.Length);//將post對象放入請求流中                reqStream.Close();            }            #endregion            try            {                HttpWebResponse resp = (HttpWebResponse)req.GetResponse();                Stream stream = resp.GetResponseStream();                //擷取響應內容                  using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))                {                    result = reader.ReadToEnd();                }            }            catch (WebException w)            {                hw = (HttpWebResponse)w.Response;                StreamReader sr = new StreamReader(hw.GetResponseStream(), Encoding.UTF8, false);                result = sr.ReadToEnd();            }            return result;        }

 

C#get ,post