在网上找了很久,于是产生了以下方法.
针对于使用WebBrowser控件浏览网页,在其Document.Cookie中找不到SessionID信息时,
则使用WebRequest发送请求,使用response.Headers["Set-Cookie"]来获得此属性中间的SessionID.
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CookieCollection cookieCheckCode;
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CookieContainer container = new CookieContainer();
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HttpWebResponse response = null;
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HttpWebRequest request = null;
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request = (HttpWebRequest)WebRequest.Create(string.Format("http://{0}/Login.aspx", host));
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request.Referer = "http://" + host;
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request.Method = "GET";
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request.Accept = "*/*";
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request.Timeout = 5000;
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request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Maxthon)";
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response = (HttpWebResponse)request.GetResponse();
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responseStream = response.GetResponseStream();
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Cookie cookie4 = new Cookie("ASP.NET_SessionId", this.GetSessionId(response.Headers["Set-Cookie"]));
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cookie4.Domain = host;
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cookieCheckCode.Add(cookie4);
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responseStream.Close();
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response.Close();
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container.Add(cookieCheckCode);
GetSessionID方法:
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/// <summary>
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/// 从Response的Headers中获取当此的SessionID
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/// </summary>
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/// <param name="value">[Response].[Headers].["Set-Cookie"]</param>
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/// <returns></returns>
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private string GetSessionId(string value)
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{
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string startTag = "ASP.NET_SessionId=";
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int indexEnd = value.IndexOf(";");
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return value.Substring(startTag.Length, indexEnd - startTag.Length);
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}
需要说明的是:
Cookie有的时候是在response.Cookies里面,有的时候是在response.Headers["Set-Cookie"]里面,
每个网站的做法都不一样,需要自己在编码的时候结合Http/Https抓包工具(比如HttpAnalyzerStdV4)的来判断.
在调试的时候也是可以的,断点调试的时候,使用监视器查看就可以看到了.
下面这个方法是直接向webBrowser浏览器中注入cookie(不知道这样的说法对不对).
cookieCheckCode 对象是一个CookieCollection对象,里面有访问指定网站所需要的Cookie信息.可能有多个.
// url: 网址
// cookieName:cookie的名称;比如:ASP.NET_SessionId
// cookieValue:cookie的值;比如:62323DE6D2DE622AF811BDF724F4EF7
//执行完这个方法调用webBrowser1.Refresh(WebBrowserRefreshOption.Completely)就可以了.
InternetSetCookie(url, cookieName, cookieValue);
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[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
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public static extern bool InternetSetCookie(string lpszUrlName, string lbszCookieName, string lpszCookieData);
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if (webBrowser1.Document != null)
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{
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foreach (Cookie ccc in cookieCheckCode)
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{
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InternetSetCookie(webBrowser1.Document.Url.AbsoluteUri, ccc.Name, ccc.Value);
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}
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}
