Question

c#WebBrowser如何清空cookie！

Answer 1

由于缓存文件是特殊的文件，以及WebBrowser与IE版本有关
因此删除缓存绝对不可能用一些IO函数就总可以解决的
因此我的这些函数在IO操作的基础上，又针对环境进行相应的清理。
static class WebCleaner
{
/*
* 7 个静态函数

* 私有函数
* private bool FileDelete() : 删除文件
* private void FolderClear() : 清除文件夹内的所有文件
* private void RunCmd() : 运行内部命令
*
* 公有函数
* public void CleanCookie() : 删除Cookie
* public void CleanHistory() : 删除历史记录
* public void CleanTempFiles() : 删除临时文件
* public void CleanAll() : 删除所有
*
*
*
* */

//private

///
/// 删除一个文件，System.IO.File.Delete()函数不可以删除只读文件，这个函数可以强行把只读文件删除。
///
/// 文件路径
/// 是否被删除
static bool FileDelete(string path)
{
//first set the File\'s ReadOnly to 0
//if EXP, restore its Attributes

System.IO.FileInfo file = new System.IO.FileInfo(path);
System.IO.FileAttributes att = 0;
bool attModified = false;

try
{
//### ATT_GETnSET
att = file.Attributes;
file.Attributes &= (~System.IO.FileAttributes.ReadOnly);
attModified = true;

file.Delete();
}
catch (Exception e)
{
if (attModified)
file.Attributes = att;

return false;
}

return true;
}

//public

///
/// 清除文件夹
///
/// 文件夹路径
static void FolderClear(string path)
{
System.IO.DirectoryInfo diPath = new System.IO.DirectoryInfo(path);
foreach (System.IO.FileInfo fiCurrFile in diPath.GetFiles())
{
FileDelete(fiCurrFile.FullName);

}
foreach (System.IO.DirectoryInfo diSubFolder in diPath.GetDirectories())
{
FolderClear(diSubFolder.FullName); // Call recursively for all subfolders
}
}

static void RunCmd(string cmd)
{
System.Diagnostics.Process.Start(\"cmd.exe\", \"/c \" + cmd);
}

///
/// 删除历史记录
///
public static void CleanHistory()
{
string[] theFiles = System.IO.Directory.GetFiles(Environment.GetFolderPath(Environment.SpecialFolder.History), \"*\", System.IO.SearchOption.AllDirectories);
foreach (string s in theFiles)
FileDelete(s);
RunCmd(\"RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 1\");
}
///
/// 删除临时文件
///
public static void CleanTempFiles()
{
FolderClear(Environment.GetFolderPath(Environment.SpecialFolder.InternetCache));
RunCmd(\"RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 8\");
}
///
/// 删除Cookie
///
public static void CleanCookie()
{
string[] theFiles = System.IO.Directory.GetFiles(Environment.GetFolderPath(Environment.SpecialFolder.Cookies), \"*\", System.IO.SearchOption.AllDirectories);
foreach (string s in theFiles)
FileDelete(s);
RunCmd(\"RunDll32.exe InetCpl.cpl,ClearMyTracksByProcess 2\");
}
///
/// 删除全部
///
public static void CleanAll()
{
CleanHistory();
CleanCookie();
CleanTempFiles();
}
}

Answer 2

先贴个CSDN的答案
我也在研究中～

//清空当前浏览站点的cookie
//提示是否清空
if (!AllForms.AskForConfirmation("Proceed to remove cookies from "
+ m_CurWB.LocationUrl + " ?", this))
return;
this.Cursor = Cursors.WaitCursor;
//调用ClearAllCookies方法，这里的frmCacheCookie是frmCacheCookie窗体类
iCount = m_frmCacheCookie.ClearAllCookies(m_CurWB.LocationUrl);
bshowform = false;
this.Cursor = Cursors.Default;
MessageBox.Show(this, "Deleted " + iCount.ToString() +
" Cooikes from\r\n" + m_CurWB.LocationUrl,
"Information", MessageBoxButtons.OK, MessageBoxIcon.Information);

Answer 3

webBrowser1.Document.Cookie.Remove(0, webBrowser1.Document.Cookie.Length);