WinForm项目开发中WebBrowser用法实例汇总

本文实例汇总了WinForm项目开发中WebBrowser用法，希望对大家项目开发中使用WebBrowser起到一定的帮助，具体用法如下：

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.后台调用Javascript脚本

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

  
 

   操作正在响应中.....
 
   

刷新

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);

5.请求链接获取返回处理

public class HttpWebRequestToolV2
{
public delegate HttpWebRequest RequestRule(string url);
/// 

/// 发起HttpWebResponse请求
/// 
/// 请求连接
/// 请求参数
/// 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
/// HttpWebResponse
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;
}

/// 

/// 创建验证凭证
/// eg:
/// IDictionary _requestCredentials = new Dictionary();
///_requestCredentials.Add("UserName", _userName);
///_requestCredentials.Add("PassWord", _userPwd);
///_requestCredentials.Add("MacAddress", _macAddress);
///byte[] _credentials = HttpWebRequestToolV2.CreateCredentials(_requestCredentials, Encoding.UTF8);
/// 
/// 
public static byte[] CreateCredentials(IDictionary 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 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;
}

/// 

/// 登录web网页验证
/// 
/// 超链接
/// 用户名
/// 密码
/// MAC地址
/// 会话
/// 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』
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 _requestCredentials = new Dictionary();
  _requestCredentials.Add("UserName", _userName);
  _requestCredentials.Add("PassWord", _userPwd);
  _requestCredentials.Add("MacAddress", _macAddress);

  byte[] _credentials = HttpWebRequestToolV2.
CreateCredentials

(_requestCredentials, Encoding.UTF8);
  //-----------------------------------------------------

  cookieCollection _cookie = null;
  
  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;
}

6.从WebBrowser中获取cookieContainer

/// 

/// 从WebBrowser中获取cookieContainer
/// 
/// WebBrowser对象
/// cookieContainer
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;
}