如何从某个驱动器关闭打开的文件夹的Windows资源管理器窗口 [英] How to close Windows Explorer windows with opened folders from a certain drive
问题描述
我正在写一个小应用程序,允许用户弹出(或安全删除)USB驱动器。我的应用程序工作正常,但在Windows资源管理器中打开USB驱动器(或多个文件夹)上的文件夹的情况除外。在这种情况下,弹出功能会失败,因为驱动器似乎被锁定。
I'm writing a small app that will allow a user to eject (or safely remove) a USB drive. My app works fine, except the situation when a folder on the USB drive (or several folders) are opened in Windows Explorer. In that case the eject function fails as the drive appears to be locked.
所以我很好奇,因为用户通过我的应用程序发出命令来弹出USB驱动器,有没有办法让Explorer从USB驱动器打开这些打开的窗口?
So I'm curious, since the user is issuing a command through my app to eject the USB drive, is there any way to make Explorer close those open windows from the USB drive?
PS。请注意,我不想关闭属于Windows资源管理器的所有进程,但只打开在特定驱动器上打开文件夹的进程。
PS. Note that I don't want to close all processes belonging to the Windows Explorer, but only the ones that opened folders on a specific drive.
推荐答案
procedure ProcessExplorerWindows(ADriveLetter: WideChar; AClose: Boolean);
var
ShellWindows: IShellWindows;
i: Integer;
Dispatch: IDispatch;
WebBrowser2: IWebBrowser2;
ServiceProvider: IServiceProvider;
ShellBrowser: IShellBrowser;
ShellView: IShellView;
FolderView: IFolderView;
PersistFolder2: IPersistFolder2;
ItemIDList: PItemIDList;
ShellFolder: IShellFolder;
ChildItem: PItemIDList;
Attr: DWORD;
StrRet: TStrRet;
FileName: UnicodeString;
DesktopItemIDList: PItemIDList;
begin
OleCheck(CoCreateInstance(CLASS_ShellWindows, nil, CLSCTX_INPROC_SERVER or CLSCTX_LOCAL_SERVER, IShellWindows, ShellWindows));
try
for i := ShellWindows.Count - 1 downto 0 do
begin
Dispatch := ShellWindows.Item(i);
try
OleCheck(Dispatch.QueryInterface(IWebBrowser2, WebBrowser2));
try
OleCheck(Dispatch.QueryInterface(IServiceProvider, ServiceProvider));
try
OleCheck(ServiceProvider.QueryService(SID_STopLevelBrowser, IShellBrowser, ShellBrowser));
try
OleCheck(ShellBrowser.QueryActiveShellView(ShellView));
try
OleCheck(ShellView.QueryInterface(IFolderView, FolderView));
try
OleCheck(FolderView.GetFolder(IPersistFolder2, PersistFolder2));
try
OleCheck(PersistFolder2.GetCurFolder(ItemIDList));
try
OleCheck(SHBindToParent(ItemIDList, IShellFolder, Pointer(ShellFolder), ChildItem));
try
Attr := SFGAO_FILESYSTEM;
OleCheck(ShellFolder.GetAttributesOf(1, ChildItem, Attr));
if Attr and SFGAO_FILESYSTEM = SFGAO_FILESYSTEM then
begin
OleCheck(ShellFolder.GetDisplayNameOf(ChildItem, SHGDN_FORPARSING, StrRet));
FileName := '';
case StrRet.uType of
STRRET_WSTR:
begin
FileName := StrRet.pOleStr;
CoTaskMemFree(StrRet.pOleStr);
end;
STRRET_OFFSET:
if Assigned(ChildItem) then
begin
Inc(PByte(ChildItem), StrRet.uOffset);
FileName := UnicodeString(PAnsiChar(ChildItem));
end;
STRRET_CSTR:
FileName := UnicodeString(AnsiString(StrRet.cStr));
end;
if ExtractFileDrive(FileName) = ADriveLetter + ':' then
if AClose then
WebBrowser2.Quit
else
begin
SHGetFolderLocation(0, CSIDL_DESKTOP, 0, 0, DesktopItemIDList);
try
OleCheck(ShellBrowser.BrowseObject(DesktopItemIDList, SBSP_SAMEBROWSER or SBSP_DEFMODE or SBSP_ABSOLUTE));
finally
CoTaskMemFree(DesktopItemIDList);
end;
end;
end;
finally
ShellFolder := nil;
end;
finally
CoTaskMemFree(ItemIDList);
end;
finally
PersistFolder2 := nil
end;
finally
FolderView := nil;
end;
finally
ShellView := nil;
end;
finally
ShellBrowser := nil;
end;
finally
ServiceProvider := nil;
end;
finally
WebBrowser2 := nil;
end;
finally
Dispatch := nil;
end;
end;
finally
ShellWindows := nil;
end;
end;
这篇关于如何从某个驱动器关闭打开的文件夹的Windows资源管理器窗口的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!