c# .net 4.0 HttpWebRequest 访问https TLS1.2 解决方案

来源：互联网发布：逆矩阵怎么求编辑：程序博客网时间：2024/05/16 07:07

如标题所诉，和普通http访问没多大差别，只需要加一句

ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;

下面是完整的一个列子

    public static string DoRequest(string Url, string cookieStr)        {            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);            request.Timeout = 1000 *900;            request.Headers.Add(HttpRequestHeader.Cookie, cookieStr);            request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36";            ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;// SecurityProtocolType.Tls1.2;            string back ="";            try {                        WebResponse response = request.GetResponse();                        StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.UTF8);                         back = reader.ReadToEnd();                        reader.Close();                        reader.Dispose();                        response.Close();            }            catch(Exception ex){                back = ex.Message;            }            return back;        }

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