关于解决请求被中止：无法建立SSL / TLS安全通道

我使用HttpWebRequest访问其他网站时,出现"请求被中止：无法建立 SSL / TLS安全通道"错误,于是goog和百度了一番,提供的答案基本是:ServicePointManager.ServerCertificateValidationCallback写委托

public ResponseModel GetHtml(string url)
{
 
ServicePointManager.ServerCertificateValidationCallback = ValidateServerCertificate;
 
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
 
}
 

private bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{

return true;
}

但这种方法对我无效,该出现的错误还是继续出现.

最终解决办法是,在访问url前执行语句 ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;即可

public ResponseModel GetHtml(string url) 
{

     ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3; 
　　　HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
} 