关于HttpWebResponse.GetResponseHeader

[zhouhaihe]

HttpWebResponse.GetResponseHeader(string headerName);
我想取得头部信息，但不知道headerName这个参数录入什么，这个参数是在哪里的？或者是怎么添加的？

[daihua_1113]

~~~~~~~~~~~你要取什么信息就写什么名字

[龍月]

该示例创建 Web 请求并查询响应。如果站点要求身份验证，则该示例将以质询字符串进行响应。使用 GetResponseHeader 提取该字符串。

public static void GetPage(String url) 
    {
    try 
             {    
                Uri ourUri = new Uri(url);
                // Creates an HttpWebRequest for the specified URL. 
                HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(ourUri); 
                HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
                Console.WriteLine("\nThe server did not issue any challenge.  Please try again with a protected resource URL.");
                // Releases the resources of the response.
                myHttpWebResponse.Close(); 
            } 
        catch(WebException e) 
           {
                HttpWebResponse response = (HttpWebResponse)e.Response;
                if (response != null)
                {
                    if (response.StatusCode == HttpStatusCode.Unauthorized)
                    {
                        string challenge = null;
                        challenge= response.GetResponseHeader("WWW-Authenticate");
                        if (challenge != null)
                            Console.WriteLine("\nThe following challenge was raised by the server:{0}",challenge);
                    }
                    else
                        Console.WriteLine("\nThe following WebException was raised : {0}",e.Message);
                }
                else
                    Console.WriteLine("\nResponse Received from server was null");

            }
        catch(Exception e)
        {
            Console.WriteLine("\nThe following Exception was raised : {0}",e.Message);
        }
    }
}

[brood108]

在实际程序中，有时需要从服务器获取一些信息，例如，读取服务器发出信息的首部，读取首部而忽略内容。通过读取首部信息，可以获取到Content-Type（内容类型）、Content-Length（内容长度）等。

常见的有：
Accept
Accept-Encoding
Accept-Language
Connection
Cookie
Host
User-Agent

[a184485789]

楼上正解，HeaderName可以填Accept
Accept-Encoding
Accept-Language
Connection
Cookie
Host
User-Agent
还有Referer x-flash-version等

[wuyq11]

HttpWebResponse response = request.GetResponse() as HttpWebResponse;
Console.WriteLine("头部消息:");
for (int i = 0; i < response.Headers.Count; ++i)
{
Console.WriteLine("Key:{0},Value:{1}", response.Headers.Keys[i], response.Headers[i]);
}
http://msdn.microsoft.com/zh-cn/library/system.net.httpwebresponse.getresponseheader.aspx