网上好不容易找到的，分享+收藏

一、接口文件

using System;using System.ComponentModel;using System.Net;using System.Runtime.InteropServices;using System.Security;using System.Security.Permissions;using System.Text;namespace CookieHandler{    internal sealed class INativeMethods    {        #region enums        public enum ErrorFlags        {            ERROR_INSUFFICIENT_BUFFER = 122,            ERROR_INVALID_PARAMETER = 87,            ERROR_NO_MORE_ITEMS = 259        }        public enum InternetFlags        {            INTERNET_COOKIE_HTTPONLY = 8192, //Requires IE 8 or higher                 INTERNET_COOKIE_THIRD_PARTY = 131072,            INTERNET_FLAG_RESTRICTED_ZONE = 16        }        #endregion        #region DLL Imports        [SuppressUnmanagedCodeSecurity, SecurityCritical, DllImport("wininet.dll", EntryPoint = "InternetGetCookieExW", CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]        internal static extern bool InternetGetCookieEx([In] string Url, [In] string cookieName, [Out] StringBuilder cookieData, [In, Out] ref uint pchCookieData, uint flags, IntPtr reserved);        #endregion    }}

　　二、获取cookie类

using System;using System.Collections.Generic;using System.ComponentModel;using System.Net;using System.Runtime.InteropServices;using System.Security;using System.Security.Permissions;using System.Text;namespace CookieHandler{    /// 
    /// 取得WebBrowser的完整Cookie。    /// 因为默认的webBrowser1.Document.Cookie取不到HttpOnly的Cookie    /// IE7不兼容，IE8可以，其它未知    ///    public class FullWebBrowserCookie    {        public static Dictionary
     
       GetCookieList(Uri uri, bool throwIfNoCookie)        {            Dictionary
      
        dict = new Dictionary
       
        ();            string cookie = GetCookieInternal(uri, throwIfNoCookie);            Console.WriteLine("FullWebBrowserCookie - 所有cookie:" + cookie);            string[] arrCookie = cookie.Split(';');            foreach (var item in arrCookie)            {                string[] arr = item.Split('=');                string key = arr[0].Trim();                string val = "";                if (arr.Length >= 2)                {                    val = arr[1].Trim();                }                if (!dict.ContainsKey(key))                {                    dict.Add(key, val);                }            }            Console.WriteLine("FullWebBrowserCookie - cookie已载入dict，共" + dict.Count.ToString() + "项");            return dict;        }        public static string GetCookieValue(string key, Uri uri, bool throwIfNoCookie)        {            Console.WriteLine("GetCookieValue");            Dictionary
        
          dict = GetCookieList(uri, throwIfNoCookie);            if (dict.ContainsKey(key))            {                return dict[key];            }            return "";        }        [SecurityCritical]        public static string GetCookieInternal(Uri uri, bool throwIfNoCookie)        {            Console.WriteLine("GetCookieInternal");            uint pchCookieData = 0;            string url = UriToString(uri);            uint flag = (uint)INativeMethods.InternetFlags.INTERNET_COOKIE_HTTPONLY;            //Gets the size of the string builder                 if (INativeMethods.InternetGetCookieEx(url, null, null, ref pchCookieData, flag, IntPtr.Zero))            {                pchCookieData++;                StringBuilder cookieData = new StringBuilder((int)pchCookieData);                //Read the cookie                     if (INativeMethods.InternetGetCookieEx(url, null, cookieData, ref pchCookieData, flag, IntPtr.Zero))                {                    DemandWebPermission(uri);                    return cookieData.ToString();                }            }            int lastErrorCode = Marshal.GetLastWin32Error();            if (throwIfNoCookie || (lastErrorCode != (int)INativeMethods.ErrorFlags.ERROR_NO_MORE_ITEMS))            {                throw new Win32Exception(lastErrorCode);            }            return null;        }        private static void DemandWebPermission(Uri uri)        {            string uriString = UriToString(uri);            if (uri.IsFile)            {                string localPath = uri.LocalPath;                new FileIOPermission(FileIOPermissionAccess.Read, localPath).Demand();            }            else            {                new WebPermission(NetworkAccess.Connect, uriString).Demand();            }        }        private static string UriToString(Uri uri)        {            if (uri == null)            {                throw new ArgumentNullException("uri");            }            UriComponents components = (uri.IsAbsoluteUri ? UriComponents.AbsoluteUri : UriComponents.SerializationInfoString);            return new StringBuilder(uri.GetComponents(components, UriFormat.SafeUnescaped), 2083).ToString();        }    }}