C#帶cookie Post和Get方式發送數據，保持cookie

在實際編程中，可能需要讀取特定網頁的信息，但很多網站需要用戶登錄后，才能夠獲取相關的頁面內容，這就需要編程者先臨時存儲當前的cookie，
在C#中可以使用CookieContainer 對象來保存登錄后的Cookie信息，這樣，在每次發送數據的時候，附加上Cookie信息，就可以了。

#region 同步通過POST方式發送數據
       /// <summary>
       /// 通過POST方式發送數據
       /// </summary>
       /// <param name="Url">url</param>
       /// <param name="postDataStr">Post數據</param>
       /// <param name="cookie">Cookie容器</param>
       /// <returns></returns>
       public string SendDataByPost(string Url,string postDataStr,ref CookieContainer cookie)
       {
         HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
         if (cookie.Count == 0)
         {
            request.CookieContainer = new CookieContainer();
            cookie = request.CookieContainer;
         }
         else
         {
            request.CookieContainer = cookie;
         }

         request.Method = "POST";
         request.ContentType = "application/x-www-form-urlencoded";
         request.ContentLength = postDataStr.Length;
         Stream myRequestStream = request.GetRequestStream();
         StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
         myStreamWriter.Write(postDataStr);
         myStreamWriter.Close();

         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;
       }
       #endregion

       #region 同步通過GET方式發送數據
       /// <summary>
       /// 通過GET方式發送數據
       /// </summary>
       /// <param name="Url">url</param>
       /// <param name="postDataStr">GET數據</param>
       /// <param name="cookie">GET容器</param>
       /// <returns></returns>
       public string SendDataByGET(string Url, string postDataStr, ref CookieContainer cookie)
       {
         HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url +( postDataStr == "" ? "" : "?") + postDataStr);
         if (cookie.Count == 0)
         {
            request.CookieContainer = new CookieContainer();
            cookie = request.CookieContainer;
         }
         else
         {
            request.CookieContainer = cookie;
         }

         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;
       }
       #endregion

 

 

 

操作代碼

CookieContainer cc=new CookieContainer();
cc.Add(new System.Uri("http://www.baidu.com "), new Cookie("PHPSESSID", "xx"));
string content =  web.SendDataByGET("http://www.baidu.com/xx/yy.php","","gbk",ref cc);
MessageBox.Show(content);