.net 获取https页面的信息 在iis7.5服务器上不管用

让我纠结了一天多的问题，给大家看下，有相同情况的可以不用浪费时间了，本人当时找了好半天都没找到什么有用的信息，项目在本地没有问题，但部署在服务器后，获取不到https页面的信息，加入下面的代码就可以了，因为iis7.5的安全协议比较高的原因。

我的获取页面需要cookie，不需要的可以去掉；

GET的方法：

  /// <summary>
         /// 获取URL访问的HTML内容 获取https 页面的
         /// </summary>
         /// <param name="Url">URL地址</param>
         /// <returns>HTML内容</returns>
         public static string GetWebContent(string Url, CookieContainer cookieContainer)
         {
             string strResult = "";
             try
             {
                 ServicePointManager.Expect100Continue = true;
                 ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
                 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
                 request.CookieContainer = cookieContainer;
                 request.Timeout = ;
                 request.Headers.Set("Pragma", "no-cache");

                 HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                 Stream streamReceive = response.GetResponseStream();

                 Encoding encoding = Encoding.GetEncoding("utf-8");
                 StreamReader streamReader = new StreamReader(streamReceive, encoding);
                 strResult = streamReader.ReadToEnd();
             }
             catch
             {

             }
             return strResult;
         }

POST的方法：

 /// <summary>
         /// post提交数据到https
         /// </summary>
         /// <param name="posturl"></param>
         /// <param name="postdata"></param>
         /// <param name="header"></param>
         /// <param name="cookieContainer"></param>
         /// <returns></returns>
         public static string SetPostHtml(string posturl, string postdata, HttpHeader header, CookieContainer cookieContainer)
         {
             string restr = "";
             ServicePointManager.Expect100Continue = true;
             ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
             HttpWebRequest request = null;
             HttpWebResponse response = null;
             request = (HttpWebRequest)WebRequest.Create(posturl);
             request.CookieContainer = cookieContainer;
             request.Method = header.method;
             request.Referer = header.Referer;
             request.ContentType = header.contentType;
             byte[] postdatabyte = Encoding.UTF8.GetBytes(postdata);
             request.ContentLength = postdatabyte.Length;
             request.AllowAutoRedirect = false;
             request.KeepAlive = true;
             //提交请求
             Stream stream;
             stream = request.GetRequestStream();
             stream.Write(postdatabyte, , postdatabyte.Length);
             stream.Close();
             //接收响应
             response = (HttpWebResponse)request.GetResponse();
             using (StreamReader reader = new StreamReader(response.GetResponseStream()))
             {
                 restr = reader.ReadToEnd().ToString();
             }
             return restr;
         }

希望对大家有帮助；