清除webBrowser 缓存和Cookie的解决方案

通过测试webBrowser与IE缓存和Cookie都存放在Local Settings\Temporary Internet Files,我们可以直接调用IE API进行清除

解决方案1:

public enum ShowCommands : int

{

SW_HIDE = ,

SW_SHOWNORMAL = ,

SW_NORMAL = ,

SW_SHOWMINIMIZED = ,

SW_SHOWMAXIMIZED = ,

SW_MAXIMIZE = ,

SW_SHOWNOACTIVATE = ,

SW_SHOW = ,

SW_MINIMIZE = ,

SW_SHOWMINNOACTIVE = ,

SW_SHOWNA = ,

SW_RESTORE = ,

SW_SHOWDEFAULT = ,

SW_FORCEMINIMIZE = ,

SW_MAX = 

}
[DllImport("shell32.dll")]
static extern IntPtr ShellExecute( IntPtr hwnd, string lpOperation, string lpFile, string lpParameters, string lpDirectory, ShowCommands nShowCmd); //清除IE临时文件
ShellExecute(IntPtr.Zero, "open", "rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 255", "", ShowCommands.SW_HIDE)

其中ClearMyTracksByProcess 可进行选择设置 :

Temporary Internet Files  (Internet临时文件)

RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 8

Cookies

RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 2

History (历史记录)

RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 1

 Form. Data (表单数据)

RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 16

 Passwords (密码)

RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 32

 Delete All  (全部删除)

RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 255

缺点:在Webbrowser 在不关闭的情况下无法清除cookie

解决方案2:

//清除Session所需要调用的函数
[ DllImport ("wininet.dll" , SetLastError = true )]
private static extern bool InternetSetOption ( IntPtr hInternet , int dwOption, IntPtr lpBuffer , int lpdwBufferLength );
//清空session
public void ResetSession()
{
//Session的选项ID为42
InternetSetOption ( IntPtr.Zero , , IntPtr.Zero , );
}
//清空cookie
public void ResetCookie()
{
if (c_web.Document != null )
{
c_web.Document.Cookie.Remove ( , c_web.Document.Cookie.Count() - ); }
string [] theCookies = System.IO.Directory.GetFiles ( Environment.GetFolderPath (Environment.SpecialFolder.Cookies ));
foreach (string currentFile in theCookies )
{
try
{
System.IO.File.Delete (currentFile );
}
catch (Exception ex)
{
}
}
}

缺点:需要程序取得管理员权限

解决方案3:

利用 webBrowser 执行清楚cookie的js代码

this._webBrowser.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());}}}})())");

缺点:在某些运行环境中会报“无法下载”的错,至于原因目前还没找到

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