下面是我測試下來的6種清除webbrowser中cookie的6種方法：

//方法一：調用 wininet.dll清除cookie (推薦)SuppressWininetBehavior();//方法二：刪除用戶登錄后的信息,這里相當于瀏覽器的注銷功能,使用的是ie自帶的功能 (推薦)HtmlDocument document = wb.Document;document.ExecCommand("ClearAuthenticationCache", false, null);//方法三：刪除本機cookie 此方法會彈出ie清除cookie的彈出框//Temporary Internet Files (Internet臨時文件)//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 8//Cookies//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 2//History (歷史記錄)//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 1//Form. Data (表單數據)//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 16//Passwords (密碼)//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 32//Delete All (全部刪除)//ShellExecute(IntPtr.Zero, "open", "rundll32.exe", " InetCpl.cpl,ClearMyTracksByProcess 2", "", ShowCommands.SW_HIDE);ShellExecute(IntPtr.Zero, "open", "rundll32.exe", " InetCpl.cpl,ClearMyTracksByProcess 255", "", ShowCommands.SW_HIDE);//方法四:使用webbrowser自帶的清coookie的方法 (不推薦，清不掉session，實測無效)wb.Document.Cookie.Remove(0, (wb.Document.Cookie.Count() - 1));//方法五：使用js清除cookie (不推薦，清不掉session)wb.Navigate("javascript:void((function(){var a,b,c,e,f;f=0;a=document.cookie.split('; ');for(e=0;e<a.length&&a[e];e++){f++;for(b='.'+location.host;b;b=b.replace(/^(?:%5C.|[^%5C.]+)/,'')){for(c=location.pathname;c;c=c.replace(/.$/,'')){document.cookie=(a[e]+'; domain='+b+'; path='+c+'; expires='+new Date((new Date()).getTime()-1e11).toGMTString());}}}})())");//var a,b,c,e,f;//f=0;//a=document.cookie.split('; ');//b='.'+'baidu.com';b='.'+'www.baidu.com';//for(e=0;e<a.length;e++){// //b='.'+location.host;// b=b.replace(/^(?:%5C.|[^%5C.]+)/,'');// c=location.pathname;// c=c.replace(/.$/,'');// ck = a[e]+'; domain='+b+'; path='+c+'; expires='+new Date((new Date()).getTime()-1e11).toGMTString();// console.log(ck);// document.cookie=ck;//}//方法六：使用InternetSetCookie給cookie賦null值 (不推薦)//也可以給此Cookie賦空值:InternetSetCookie//InternetSetCookie("http://.qq.com/", NULL, "uin=; PATH=/; DOMAIN=qq.com");

方法一：

[System.Runtime.InteropServices.DllImport("wininet.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto, SetLastError = true)]public static extern bool InternetSetOption(int hInternet, int dwOption, IntPtr lpBuffer, int dwBufferLength);/// <summary>/// 使用InternetSetOption操作wininet.dll清除webbrowser里的cookie/// </summary>private static unsafe void SuppressWininetBehavior(){/* SOURCE: http://msdn.microsoft.com/en-us/library/windows/desktop/aa385328%28v=vs.85%29.aspx* INTERNET_OPTION_SUPPRESS_BEHAVIOR (81):* A general purpose option that is used to suppress behaviors on a process-wide basis. * The lpBuffer parameter of the function must be a pointer to a DWORD containing the specific behavior to suppress. * This option cannot be queried with InternetQueryOption. * * INTERNET_SUPPRESS_COOKIE_PERSIST (3):* Suppresses the persistence of cookies, even if the server has specified them as persistent.* Version: Requires Internet Explorer 8.0 or later.*/int option = (int)3/* INTERNET_SUPPRESS_COOKIE_PERSIST*/;int* optionPtr = &option;bool success = InternetSetOption(0, 81/*INTERNET_OPTION_SUPPRESS_BEHAVIOR*/, new IntPtr(optionPtr), sizeof(int));if (!success){MessageBox.Show("Something went wrong ! Clear Cookie Failed!");}}

?

方法二：

就只有這一句就好了：

//方法二：刪除用戶登錄后的信息,這里相當于瀏覽器的注銷功能,使用的是ie自帶的功能 (推薦)HtmlDocument document = wb.Document;document.ExecCommand("ClearAuthenticationCache", false, null);

方法三：

//方法三：刪除本機cookie 此方法會彈出ie清除cookie的彈出框//Temporary Internet Files (Internet臨時文件)//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 8//Cookies//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 2//History (歷史記錄)//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 1//Form. Data (表單數據)//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 16//Passwords (密碼)//RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 32//Delete All (全部刪除)//ShellExecute(IntPtr.Zero, "open", "rundll32.exe", " InetCpl.cpl,ClearMyTracksByProcess 2", "", ShowCommands.SW_HIDE);ShellExecute(IntPtr.Zero, "open", "rundll32.exe", " InetCpl.cpl,ClearMyTracksByProcess 255", "", ShowCommands.SW_HIDE); ShellExecute方法： public enum ShowCommands : int{SW_HIDE = 0,SW_SHOWNORMAL = 1,SW_NORMAL = 1,SW_SHOWMINIMIZED = 2,SW_SHOWMAXIMIZED = 3,SW_MAXIMIZE = 3,SW_SHOWNOACTIVATE = 4,SW_SHOW = 5,SW_MINIMIZE = 6,SW_SHOWMINNOACTIVE = 7,SW_SHOWNA = 8,SW_RESTORE = 9,SW_SHOWDEFAULT = 10,SW_FORCEMINIMIZE = 11,SW_MAX = 11}[DllImport("shell32.dll")]static extern IntPtr ShellExecute(IntPtr hwnd, string lpOperation, string lpFile, string lpParameters, string lpDirectory, ShowCommands nShowCmd);

方法四：

//方法四:使用webbrowser自帶的清coookie的方法 (不推薦，清不掉session，實測無效)wb.Document.Cookie.Remove(0, (wb.Document.Cookie.Count() - 1));

方法五：

//方法五：使用js清除cookie (不推薦，清不掉session)wb.Navigate("javascript:void((function(){var a,b,c,e,f;f=0;a=document.cookie.split('; ');for(e=0;e<a.length&&a[e];e++){f++;for(b='.'+location.host;b;b=b.replace(/^(?:%5C.|[^%5C.]+)/,'')){for(c=location.pathname;c;c=c.replace(/.$/,'')){document.cookie=(a[e]+'; domain='+b+'; path='+c+'; expires='+new Date((new Date()).getTime()-1e11).toGMTString());}}}})())");//var a,b,c,e,f;//f=0;//a=document.cookie.split('; ');//b='.'+'baidu.com';b='.'+'www.baidu.com';//for(e=0;e<a.length;e++){// //b='.'+location.host;// b=b.replace(/^(?:%5C.|[^%5C.]+)/,'');// c=location.pathname;// c=c.replace(/.$/,'');// ck = a[e]+'; domain='+b+'; path='+c+'; expires='+new Date((new Date()).getTime()-1e11).toGMTString();// console.log(ck);// document.cookie=ck;//}

將?wb.Navigate("javascript:void((function(){。。。}里的內容換成下面注釋掉的代碼，寫好你要清cookier 的domain然后就可以清了，但清不掉session，這個是從外國網站上看來的，實際無效！

方法六：

//方法六：使用InternetSetCookie給cookie賦null值 (不推薦)//也可以給此Cookie賦空值:InternetSetCookie//InternetSetCookie("http://.qq.com/", NULL, "uin=; PATH=/; DOMAIN=qq.com");

關于InternetSetCookie這個方法自己網上搜索一下.

總結

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