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说明

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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();
??