[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; }