C#简单爬虫核心代码

string strr = 网页url;

ServicePointManager.ServerCertificateValidationCallback += RemoteCertificateValidate;//验证服务器证书回调自动验证

System.Net.WebClient client = new System.Net.WebClient();

string reply = string.Empty;

reply = client.DownloadString(strr);

private static bool RemoteCertificateValidate(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors error)

{

// trust any certificate!!!

//为了通过证书验证，总是返回true

return true;

}