为了在登录后使用HttpWebRequest访问辅助URL，您需要记住一些事情。

首先，正如Casperah所提到的，您需要检查登录表单并确定用于接收登录数据的控件的“名称”属性。

完成此操作后，您需要相应地格式化一个post字符串并将其提供给WebRequest。

最后一个考虑因素是，一旦您登录，您将需要存储和维护从您登录的服务器分配给您的cookie。

我从这篇msdn文章中获取了一个WebRequest片段，并对其进行了修改，以便在登录后执行第二页请求。

  string loginurl = "https://www.gmail.com"; string secondurl = "https://mail.google.com/prefs"; string username = "bob@gmail.com"; string password = "12345"; GetSecondaryLoginPage(loginurl, secondurl, username, password); public string GetSecondaryLoginPage(string loginurl, string secondurl, string username, string password, string cookieName = null) { // Create a request using a URL that can receive a post. HttpWebRequest request = (HttpWebRequest)WebRequest.Create(loginurl); // Set the Method property of the request to POST. request.Method = "POST"; CookieContainer container = new CookieContainer(); if (cookieName != null) container.Add(new Cookie(cookieName, username, "/", new Uri(loginurl).Host)); request.CookieContainer = container; // Create POST data and convert it to a byte array. Modify this line accordingly string postData = String.Format("username={0}&password={1}", username, password); ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications); byte[] byteArray = Encoding.UTF8.GetBytes(postData); // Set the ContentType property of the WebRequest. request.ContentType = "application/x-www-form-urlencoded"; // Set the ContentLength property of the WebRequest. request.ContentLength = byteArray.Length; // Get the request stream. Stream dataStream = request.GetRequestStream(); // Write the data to the request stream. dataStream.Write(byteArray, 0, byteArray.Length); // Close the Stream object. dataStream.Close(); // Get the response. WebResponse response = request.GetResponse(); // Get the stream containing content returned by the server. dataStream = response.GetResponseStream(); // Open the stream using a StreamReader for easy access. StreamReader reader = new StreamReader(dataStream); // Read the content. string responseFromServer = reader.ReadToEnd(); using (StreamWriter outfile = new StreamWriter("output.html")) { outfile.Write(responseFromServer.ToString()); } // Clean up the streams. reader.Close(); dataStream.Close(); response.Close(); request = (HttpWebRequest)WebRequest.Create(secondurl); request.CookieContainer = container; response = request.GetResponse(); // Get the stream containing content returned by the server. dataStream = response.GetResponseStream(); // Open the stream using a StreamReader for easy access. reader = new StreamReader(dataStream); // Read the content. responseFromServer = reader.ReadToEnd(); // Clean up the streams. reader.Close(); dataStream.Close(); response.Close(); return responseFromServer; } public bool AcceptAllCertifications(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certification, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors) { return true; } 

唯一添加的行是postData和cookies。

您需要修改该行

 string postData = String.Format("username={0}&password={1}", username, password); 

根据您在表单上的控件，因为您发布了您尝试使用的网站，我猜你可能正在寻找

 string postData = String.Format("uid={0}&portalBase=cwa&password={1}", username, password); 

在表单中使用WebBrowser相当容易。 首先导航到cwaLogon.jsp页面，找到输入控件，然后在提交按钮上调用“单击”。 使用HTTPWebRequest和Response进行相应的GET / POST。 使用Fiddler2来检查要发布的内容是一个很好的开始。

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