[WinForm]项目开发中WebBrowser使用小计

1.

    [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]    [ComVisibleAttribute(true)]    public partial class frmWebData : Form    {        public frmWebData()        {            InitializeComponent();        }        PRotected override void OnLoad(EventArgs e)        {            wbService.ObjectForScripting = this;            base.OnLoad(e);        }}

2.后台调用javascript脚本

    <script type="text/Javascript" language="javascript">        function ErrorMessage(message) {            document.getElementById("error").innerText = message;        }    </script>

后台代码

        static string ErrorMsg = string.Empty;        private void wbService_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)        {            if (!string.IsNullOrEmpty(ErrorMsg))                wbService.Document.InvokeScript("ErrorMessage", new object[1] { string.Format("操作失败，原因:{0}！", ErrorMsg) });        }

3.JavaScript脚本调用后台方法

脚本代码

            <div id="content">                <h2 id="error">                    操作正在响应中.....</h2>                <div class="utilities">                    <a class="button right" 

onclick="window.external.DoSvrWebDbBack()">

刷新</a>                     <!--<a class="button right"                        onclick="window.external.NavigateToLogin()">重新登录</a>-->                    <div class="clear">                    </div>                </div>            </div>

后台代码

   public void DoSvrWebDbBack()        {            try            {            }            catch (TimeoutException)            {                ErrorMsg = "超时，请稍候再尝试！";            }            catch (Exception ex)            {                ErrorMsg = ex.Message.ToString();            }        }

4.设置cookie

Cookie _cookie = BaseWinForm.LoginMessage.sessionID2;                    InternetSetCookie(BaseWinForm.LoginMessage.SvrWebDbBack, "asp.net_SessionId", _cookie.Value);                    wbService.Navigate(BaseWinForm.LoginMessage.SvrWebDbBack, null, null, string.Format("Referer:{0}", BaseWinForm.LoginMessage.SvrWebDbLoingUrl));

        [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]        public static extern bool InternetSetCookie(string urlName, string cookieName, string cookieData);

4.请求链接获取返回处理

    public class HttpWebRequestToolV2    {        public delegate HttpWebRequest RequestRule(string url);        /// <summary>        /// 发起HttpWebResponse请求        /// </summary>        /// <param name="url">请求连接</param>        /// <param name="credentials">请求参数</param>        /// <param name="httpWebRequestRule">请求设置『委托』，当委托等于NULL的时候，默认请求；否则使用所设置的HttpWebRequest</param>        /// <returns>HttpWebResponse</returns>        public static HttpWebResponse CreateHttpWebRequest(string url, byte[] credentials, RequestRule httpWebRequestRule)        {            if (string.IsNullOrEmpty(url))                throw new ArgumentNullException("url");            HttpWebRequest _request = null;            if (httpWebRequestRule != null)            {                _request = httpWebRequestRule(url);            }            else            {                _request = WebRequest.Create(url) as HttpWebRequest;                _request.Method = "POST";                _request.ContentType = "application/x-www-form-urlencoded";                _request.CookieContainer = new CookieContainer();            }            if (credentials != null)            {                _request.ContentLength = credentials.Length;                using (var requestStream = _request.GetRequestStream())                {                    requestStream.Write(credentials, 0, credentials.Length);                }            }            return _request.GetResponse() as HttpWebResponse;        }        /// <summary>        /// 创建验证凭证        /// eg:        /// IDictionary<string, string> _requestCredentials = new Dictionary<string, string>();        ///_requestCredentials.Add("UserName", _userName);        ///_requestCredentials.Add("PassWord", _userPwd);        ///_requestCredentials.Add("MacAddress", _macAddress);        ///byte[] _credentials = HttpWebRequestToolV2.CreateCredentials(_requestCredentials, Encoding.UTF8);        /// </summary>        /// <returns></returns>        public static byte[] CreateCredentials(IDictionary<string, string> credentials, Encoding encoding)        {            if (credentials == null)                throw new ArgumentNullException("credentials");            if (credentials.Count == 0)                throw new ArgumentException("credentials");            if (encoding == null)                throw new ArgumentNullException("encoding");            StringBuilder _credentials = new StringBuilder();            foreach (KeyValuePair<string, string> credential in credentials)            {                _credentials.AppendFormat("{0}={1}&", credential.Key, credential.Value);            }            string _credentialsString = _credentials.ToString().Trim();            int _endIndex = _credentialsString.LastIndexOf('&');            if (_endIndex != -1)                _credentialsString = _credentialsString.Substring(0, _endIndex);            return encoding.GetBytes(_credentialsString);        }

使用示例

        public static HttpWebRequest RequestSetting(string url)        {            HttpWebRequest _request = null;            _request = WebRequest.Create(url) as HttpWebRequest;            _request.Method = "POST";            _request.ContentType = "application/x-www-form-urlencoded";            _request.Timeout = 1000 * 10;//超时五秒            _request.CookieContainer = new CookieContainer();            return _request;        }        /// <summary>        /// 登录web网页验证        /// </summary>        /// <param name="url">超链接</param>        /// <param name="_userName">用户名</param>        /// <param name="_userPwd">密码</param>        /// <param name="_macAddress">MAC地址</param>        /// <param name="sessionID">会话</param>        /// <returns>网页登录验证是否成功『失败，将抛出网页验证验证失败信息』</returns>        public bool ProcessRemoteLogin(string url, string _userName, string _userPwd, string _macAddress, out  Cookie sessionID)        {            bool _checkResult = false;            string _errorMessage = string.Empty;            //--------------------创建登录凭证--------------------            IDictionary<string, string> _requestCredentials = new Dictionary<string, string>();            _requestCredentials.Add("UserName", _userName);            _requestCredentials.Add("PassWord", _userPwd);            _requestCredentials.Add("MacAddress", _macAddress);            byte[] _credentials = HttpWebRequestToolV2.

CreateCredentials

(_requestCredentials, Encoding.UTF8);            //-----------------------------------------------------            CookieCollection _cookie = null;            /*             *LoginType 1:成功 0：失败               *Err 失败原因             */            using (HttpWebResponse _httpRespone = HttpWebRequestToolV2.

CreateHttpWebRequest

(url, _credentials, RequestSetting))            {                _cookie = new CookieCollection();                if (_httpRespone.Cookies.Count > 0)                    _cookie.Add(_httpRespone.Cookies);            }            //-------------------------------------------------------            Cookie _loginType = _cookie["LoginType"];            sessionID = _cookie["ASP.NET_SessionId"];            Cookie _err = _cookie["Err"];            if (_loginType != null && _err != null && sessionID != null)            {                _checkResult = _loginType.Value.Equals("1");                if (!_checkResult)                    _errorMessage = HttpUtility.UrlDecode(_err.Value);            }            else            {                _errorMessage = "Web服务异常，请稍候在试！";            }            if (!string.IsNullOrEmpty(_errorMessage))                throw new Exception(_errorMessage);            return _checkResult;        }

5.从WebBrowser中获取CookieContainer

        /// <summary>        /// 从WebBrowser中获取CookieContainer        /// </summary>        /// <param name="webBrowser">WebBrowser对象</param>        /// <returns>CookieContainer</returns>        public static CookieContainer GetCookieContainer(this WebBrowser webBrowser)        {            if (webBrowser == null)                throw new ArgumentNullException("webBrowser");            CookieContainer _cookieContainer = new CookieContainer();            string _cookieString = webBrowser.Document.Cookie;            if (string.IsNullOrEmpty(_cookieString)) return _cookieContainer;            string[] _cookies = _cookieString.Split(';');            if (_cookies == null) return _cookieContainer;            foreach (string cookieString in _cookies)            {                string[] _cookieNameValue = cookieString.Split('=');                if (_cookieNameValue.Length != 2) continue;                Cookie _cookie = new Cookie(_cookieNameValue[0].Trim().ToString(), _cookieNameValue[1].Trim().ToString());                _cookieContainer.Add(_cookie);            }            return _cookieContainer;        }