c#之如何使用 WebBrowser 控件从发送 POST 数据中获取响应数据

我想知道如何在使用 WebBrowser 控件的重载“Navigate”方法后获取响应数据。这是我正在做的一个例子:

wb.Navigate("https://live.xbox.com/en-US/Friends/List", "", Encoding.ASCII.GetBytes(post), "Content-Type: application/x-www-form-urlencoded\r\n"); 

这是将我的页面导航到第一个参数，但我不知道如何通过调用它来获取响应数据。我想要的结果也是响应的主体。 有人可以帮帮我吗？我尝试使用 WebRequest 和 WebResponse 方式，但出于某种原因它们不允许我将用户登录到 Xbox Live 网站，导致我无法执行任何操作并出现 411 错误。不过，我希望能够使用 WebBrowser 执行此操作。但如果我不能，任何帮助将不胜感激。

请您参考如下方法:

您可以使用 webbrowser 控件使用虚假的 web 点击事件等登录(您似乎已经这样做了，+1)

然后您可以将 cookie 从 webbrowser 控件传输到 webrequest 来做更多理智的事情。您也可以缓存 cookie 以备后用

using System; 
using System.Net; 
using System.Runtime.InteropServices; 
using System.Text; 
 
namespace Sample.Helpers { 
    public class NativeMethods { 
        public static CookieContainer GetUriCookieContainer(Uri uri) { 
            CookieContainer cookies = null; 
            int datasize = 8192 * 16; // Determine the size of the cookie 
            StringBuilder cookieData = new StringBuilder(datasize); 
            if (!InternetGetCookieEx(uri.ToString(), null, cookieData, ref datasize, InternetCookieHttponly, IntPtr.Zero)) { 
                if (datasize < 0) 
                    return null; 
                cookieData = new StringBuilder(datasize); // Allocate stringbuilder large enough to hold the cookie 
                if (!InternetGetCookieEx( 
                    uri.ToString(), 
                    null, cookieData, 
                    ref datasize, 
                    InternetCookieHttponly, 
                    IntPtr.Zero)) 
                    return null; 
            } 
            if (cookieData.Length > 0) { 
                cookies = new CookieContainer(); 
                cookies.SetCookies(uri, cookieData.ToString().Replace(';', ',')); 
            } 
            return cookies; 
        } 
        [DllImport("wininet.dll", CharSet = CharSet.Unicode, SetLastError = true, ThrowOnUnmappableChar = true)] 
        private static extern bool InternetGetCookieEx(string url, string cookieName, StringBuilder cookieData, ref int size, Int32 dwFlags, IntPtr lpReserved); 
        private const Int32 InternetCookieHttponly = 0x2000; 
 
    } 
} 

示例用法

var webRequest = (HttpWebRequest)WebRequest.Create(url); 
webRequest.CookieContainer = Cookies; 
//webRequest.Headers.Add(HeaderCollection);  
webRequest.Timeout = 10000; 
//webRequest.UserAgent = UserAgent; 
webRequest.ContentType = "application/x-www-form-urlencoded; charset=UTF-8"; 
webRequest.Method = "POST"; 
byte[] postBytes; 
if (postDataRaw != null) { 
    postBytes = Encoding.UTF8.GetBytes(postDataRaw); 
} 
webRequest.ContentLength = postBytes.Length; 
using (var dataStream = webRequest.GetRequestStream()) { 
    dataStream.Write(postBytes, 0, postBytes.Length); 
} 
using (var response = webRequest.GetResponse()) { 
    var result = ((HttpWebResponse)response).StatusCode; 
    using (var responseStream = response.GetResponseStream()) { 
        using (var streamReader = new StreamReader(responseStream)) { 
            return streamReader.ReadToEnd(); 
        } 
    } 
}