C#類比http 發送post或get請求的簡單一實例_C#教程

private string HttpPost(string Url, string postDataStr)     {       HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);       request.Method = "POST";       request.ContentType = "application/x-www-form-urlencoded";       request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);       request.CookieContainer = cookie;       Stream myRequestStream = request.GetRequestStream();       StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));       myStreamWriter.Write(postDataStr);       myStreamWriter.Close();        HttpWebResponse response = (HttpWebResponse)request.GetResponse();        response.Cookies = cookie.GetCookies(response.ResponseUri);       Stream myResponseStream = response.GetResponseStream();       StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));       string retString = myStreamReader.ReadToEnd();       myStreamReader.Close();       myResponseStream.Close();        return retString;     }      public string HttpGet(string Url, string postDataStr)     {       HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" ? "" : "?") + postDataStr);       request.Method = "GET";       request.ContentType = "text/html;charset=UTF-8";        HttpWebResponse response = (HttpWebResponse)request.GetResponse();       Stream myResponseStream = response.GetResponseStream();       StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));       string retString = myStreamReader.ReadToEnd();       myStreamReader.Close();       myResponseStream.Close();        return retString;     }

在post的時候有時也用的到cookie，像登入163發郵件時候就需要發送cookie，所以在外部一個cookie屬性隨時儲存 CookieContainer cookie = new CookieContainer();

注意：有時候請求會重新導向，但我們就需要從重新導向url擷取東西，像QQ登入成功後擷取sid，但上面的會自動根據重新導向地址跳轉。我們可以用：

request.AllowAutoRedirect = false;設定重新導向禁用，你就可以從headers的Location屬性中擷取重新導向地址

以上這篇C#類比http 發送post或get請求的簡單一實例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支援雲棲社區。