WinForm項(xiàng)目開發(fā)中WebBrowser用法實(shí)例匯總
本文實(shí)例匯總了WinForm項(xiàng)目開發(fā)中WebBrowser用法,希望對大家項(xiàng)目開發(fā)中使用WebBrowser起到一定的幫助,具體用法如下:
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.后臺調(diào)用Javascript腳本
<script type="text/javascript" language="javascript"> function ErrorMessage(message) { document.getElementById("error").innerText = message; } </script> 后臺代碼 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("操作失敗,原因:{0}!", ErrorMsg) }); }
3.JavaScript腳本調(diào)用后臺方法
腳本代碼
<div id="content"> <h2 id="error"> 操作正在響應(yīng)中.....</h2> <div class="utilities"> <a class="button right" onclick="window.external.DoSvrWebDbBack()">
刷新
</a> <!--<a class="button right" onclick="window.external.NavigateToLogin()">重新登錄</a>--> <div class="clear"> </div> </div> </div>
后臺代碼
public void DoSvrWebDbBack() { try { } catch (TimeoutException) { ErrorMsg = "超時(shí),請稍候再嘗試!"; } catch (Exception ex) { ErrorMsg = ex.Message.ToString(); } }
4.設(shè)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);
5.請求鏈接獲取返回處理
public class HttpWebRequestToolV2 { public delegate HttpWebRequest RequestRule(string url); /// <summary> /// 發(fā)起HttpWebResponse請求 /// </summary> /// <param name="url">請求連接</param> /// <param name="credentials">請求參數(shù)</param> /// <param name="httpWebRequestRule">請求設(shè)置『委托』,當(dāng)委托等于NULL的時(shí)候,默認(rèn)請求;否則使用所設(shè)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> /// 創(chuàng)建驗(yàn)證憑證 /// 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;//超時(shí)五秒 _request.CookieContainer = new CookieContainer(); return _request; } /// <summary> /// 登錄web網(wǎng)頁驗(yàn)證 /// </summary> /// <param name="url">超鏈接</param> /// <param name="_userName">用戶名</param> /// <param name="_userPwd">密碼</param> /// <param name="_macAddress">MAC地址</param> /// <param name="sessionID">會話</param> /// <returns>網(wǎng)頁登錄驗(yàn)證是否成功『失敗,將拋出網(wǎng)頁驗(yàn)證驗(yàn)證失敗信息』</returns> public bool ProcessRemoteLogin(string url, string _userName, string _userPwd, string _macAddress, out Cookie sessionID) { bool _checkResult = false; string _errorMessage = string.Empty; //--------------------創(chuàng)建登錄憑證-------------------- 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:失敗 *Err 失敗原因 */ 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服務(wù)異常,請稍候在試!"; } if (!string.IsNullOrEmpty(_errorMessage)) throw new Exception(_errorMessage); return _checkResult; }
6.從WebBrowser中獲取CookieContainer
/// <summary> /// 從WebBrowser中獲取CookieContainer /// </summary> /// <param name="webBrowser">WebBrowser對象</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; }
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