C# HttpWebRequest-PreAuthenticate : Still returns 401 forbidden (HTTPS)

我想就我快速编写的以下代码向您寻求帮助，因为我总是得到“403 FORBIDDEN”。

HttpWebRequest pozadavek = (HttpWebRequest)WebRequest.Create("LINK THAT ASKS FOR AUTHLOGIN"); //https 
    System.IO.StreamReader stream = null; 
    System.String result = null; 
    public Form1() 
    { 
        InitializeComponent(); 
        pozadavek.AuthenticationLevel = System.Net.Security.AuthenticationLevel.MutualAuthRequested; 
        pozadavek.Credentials = new NetworkCredential("NAME", "PASS"); 
        pozadavek.PreAuthenticate = true; 
    } 
 
    private void Form1_Load(object sender, EventArgs e) 
    { 
        WebResponse webresponse = pozadavek.GetResponse(); //throws an exception:403 forbidden 
        stream = new System.IO.StreamReader(webresponse.GetResponseStream()); 
        result = stream.ReadToEnd(); 
        this.webBrowser1.DocumentText = result; 
    } 

请您参考如下方法:

您尝试打开的网站需要基本身份验证。底线是，您需要在您的请求中包含以 base64 编码的用户名/密码。幸运的是，.Net 可以为您做到这一点。像这样构建您的请求:

var credCache = new CredentialCache(); 
credCache.Add(new Uri("https://is.vsfs.cz/auth"), "Basic", 
                  new NetworkCredential("user", "pwd")); 
var request = (HttpWebRequest)WebRequest.Create(uri); 
request.Credentials = credCache; 

Here's one article更详细地解释了如何在 .Net 中处理各种身份验证方案。