c#获取WebBrowser浏览器 登录后的cookie

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#region 获取cookie
        /// <summary>
        /// 获取cookie
        /// </summary>
        /// <param name="pchURL"></param>
        /// <param name="pchCookieName"></param>
        /// <param name="pchCookieData"></param>
        /// <param name="pcchCookieData"></param>
        /// <param name="dwFlags"></param>
        /// <param name="lpReserved"></param>
        /// <returns></returns>
        [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref System.UInt32 pcchCookieData, int dwFlags, IntPtr lpReserved);
        public static string GetCookies(string url)
        {
            uint datasize = 256;
            StringBuilder cookieData = new StringBuilder((int)datasize);
            if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x2000, IntPtr.Zero))
            {
                if (datasize < 0) return null;
                cookieData = new StringBuilder((int)datasize);
                if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, IntPtr.Zero)) return null;
            }
            return cookieData.ToString();
        }
        #endregion

#region 获取cookie /// <summary> /// 获取cookie /// </summary> /// <param name="pchURL"></param> /// <param name="pchCookieName"></param> /// <param name="pchCookieData"></param> /// <param name="pcchCookieData"></param> /// <param name="dwFlags"></param> /// <param name="lpReserved"></param> /// <returns></returns> [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)] static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref System.UInt32 pcchCookieData, int dwFlags, IntPtr lpReserved); public static string GetCookies(string url) { uint datasize = 256; StringBuilder cookieData = new StringBuilder((int)datasize); if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x2000, IntPtr.Zero)) { if (datasize < 0) return null; cookieData = new StringBuilder((int)datasize); if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, IntPtr.Zero)) return null; } return cookieData.ToString(); } #endregion