[转]C#、VB.NET使用HttpWebRequest访问https地址(SSL)的实现

查了下MSDN，找到了解决方法，SSL网站，连接时需要提供证书，对于非必须提供客户端证书的情况，只要返回一个安全确认即可。但是此方法的实现，在.NET 1.1 和 .NET 2.0 下是不同的，下面写出2个framework版本下的实现方法：

使用的命名空间：

using System.Net;
using System.Net.Security;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;

.Net 2.0

public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
//直接确认，否则打不开
return true;
}

private void button1_Click(object sender, EventArgs e)
{
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
HttpWebRequest req = (HttpWebRequest)WebRequest.CreateDefault(new Uri("https://zu14.cn/"));
req.Method = "GET";
HttpWebResponse res = (HttpWebResponse)req.GetResponse();
//...正常使用了，和访问普通的 http:// 地址一样了

.Net 1.1

internal class AcceptAllCertificatePolicy : ICertificatePolicy
{
public AcceptAllCertificatePolicy()
{
}

public bool CheckValidationResult(ServicePoint sPoint, System.Security.Cryptography.X509Certificates.X509Certificate cert, WebRequest wRequest, int certProb)
{
//直接确认
return true;
}
}

private void button1_Click(object sender, EventArgs e)
{
ServicePointManager.CertificatePolicy = new AcceptAllCertificatePolicy();
HttpWebRequest req = (HttpWebRequest)WebRequest.CreateDefault(new Uri("https://zu14.cn/"));
req.Method = "GET";
HttpWebResponse res = (HttpWebResponse)req.GetResponse();
//...正常使用了，和访问普通的 http:// 地址一样了