先定义一个类:
public class TrustAllCertificatePolicy : System.Net.ICertificatePolicy
{
public TrustAllCertificatePolicy()
{}
public bool CheckValidationResult(ServicePoint sp,
System.Security.Cryptography.X509Certificates.X509Certificate cert,
WebRequest req, int problem)
{
return true;
}
}
然后，在请求之前加上
System.Net.ServicePointManager.CertificatePolicy = new TrustAllCertificatePolicy();
http://www.cnblogs.com/zhengyun_ustc/archive/2005/04/11/135821.html