Delphi 监视资源管理器的文件变化

发布时间:2010年04月29日      浏览次数:450 次
unit Unit2;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, shlobj, activex, StdCtrls, FileCtrl,strUtils;
const
shcne_renameitem = $1;
shcne_create = $2;
shcne_delete = $4;
shcne_mkdir = $8;
shcne_rmdir = $10;
shcne_mediainserted = $20;
shcne_mediaremoved = $40;
shcne_driveremoved = $80;
shcne_driveadd = $100;
shcne_netshare = $200;
shcne_netunshare = $400;
shcne_attributes = $800;
shcne_updatedir = $1000;
shcne_updateitem = $2000;
shcne_serverdisconnect = $4000;
shcne_updateimage = $8000;
shcne_driveaddgui = $10000;
shcne_renamefolder = $20000;
shcne_freespace = $40000;
shcne_assocchanged = $8000000;
shcne_diskevents = $2381F;
shcne_globalevents = $C0581E0;
shcne_allevents = $7FFFFFFF;
shcne_interrupt = $80000000;
shcnf_idlist = 0; // lpitemidlist
shcnf_patha = $1; // path name
shcnf_printera = $2; // printer friendly name
shcnf_dword = $3; // dword
shcnf_pathw = $5; // path name
shcnf_printerw = $6; // printer friendly name
shcnf_type = $FF;
shcnf_flush = $1000;
shcnf_flushnowait = $2000;
shcnf_path = shcnf_pathw;
shcnf_printer = shcnf_printerw;
wm_shnotify = $401;
noerror = 0;
type
TForm1 = class(TForm)
Button1: TButton;
Memo1: TMemo;
DirectoryListBox1: TDirectoryListBox;
DriveComboBox1: TDriveComboBox;
Label1: TLabel;
Button2: TButton;
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
procedure wmshellreg(var message: tmessage); message wm_shnotify;
public
{ Public declarations }
end;
type pshnotifystruct = ^shnotifystruct;
shnotifystruct = record
dwitem1: pitemidlist;
dwitem2: pitemidlist;
end;
type pshfileinfobyte = ^shfileinfobyte;
_shfileinfobyte = record
hicon: integer;
iicon: integer;
dwattributes: integer;
szdisplayname: array[0..259] of char;
sztypename: array[0..79] of char;
end;
shfileinfobyte = _shfileinfobyte;
type pidlstruct = ^idlstruct;
_idlstruct = record
pidl: pitemidlist;
bwatchsubfolders: integer;
end;
idlstruct = _idlstruct;
function shnotify_register(hwnd: integer): bool;
function shnotify_unregister: bool;
function sheventname(strpath1, strpath2: string; lparam: integer): string;
function shchangenotifyderegister(hnotify: integer): integer; stdcall;
external 'shell32.dll' index 4;
function shchangenotifyregister(hwnd, uflags, dweventid, umsg, citems: longword;
lpps: pidlstruct): integer; stdcall; external 'shell32.dll' index 2;
function shgetfileinfopidl(pidl: pitemidlist;
dwfileattributes: integer;
psfib: pshfileinfobyte;
cbfileinfo: integer;
uflags: integer): integer; stdcall;
external 'shell32.dll' name 'shgetfileinfoa';
var
Form1: TForm1;
m_hshnotify: integer;
m_pidldesktop: pitemidlist;
implementation
{$R *.dfm}
function sheventname(strpath1, strpath2: string; lparam: integer): string;
var
sevent: string;
begin
case lparam of //根据参数设置提示消息
shcne_renameitem: sevent := 'rename' + strpath1 + ':' + strpath2;
shcne_create: sevent := '建立文件 文件名:' + strpath1;
shcne_delete: sevent := '删除文件 文件名:' + strpath1;
shcne_mkdir: sevent := '新建目录 目录名:' + strpath1;
shcne_rmdir: sevent := '删除目录 目录名:' + strpath1;
shcne_mediainserted: sevent := strpath1 + '中插入可移动存储介质';
shcne_mediaremoved: sevent := strpath1 + '中移去可移动存储介质' + strpath1 + ' ' + strpath2;
shcne_driveremoved: sevent := '移去驱动器' + strpath1;
shcne_driveadd: sevent := '添加驱动器' + strpath1;
shcne_netshare: sevent := '改变目录' + strpath1 + '的共享属性';

shcne_attributes: sevent := '改变文件目录属性 文件名' + strpath1;
shcne_updatedir: sevent := '更新目录' + strpath1;
shcne_updateitem: sevent := '更新文件 文件名:' + strpath1;
shcne_serverdisconnect: sevent := '断开与服务器的连接' + strpath1 + ' ' + strpath2;
shcne_updateimage: sevent := 'shcne_updateimage';
shcne_driveaddgui: sevent := 'shcne_driveaddgui';
shcne_renamefolder: sevent := '重命名文件夹' + strpath1 + '为' + strpath2;
shcne_freespace: sevent := '磁盘空间大小改变';
shcne_assocchanged: sevent := '改变文件关联';
else
sevent := '未知操作' + inttostr(lparam);
end;
result := sevent;
end;
function shnotify_register(hwnd: integer): bool;
var
ps: pidlstruct;
begin
{$R-}
result := false;
if m_hshnotify = 0 then begin
//获取桌面文件夹的pidl
if shgetspecialfolderlocation(0, CSIDL_DESKTOP, m_pidldesktop) <> noerror then
form1.close;
if boolean(m_pidldesktop) then begin
new(ps);
try
ps.bwatchsubfolders := 1;
ps.pidl := m_pidldesktop;

// 利用shchangenotifyregister函数注册系统消息处理
m_hshnotify := shchangenotifyregister(hwnd, (shcnf_type or shcnf_idlist),
(shcne_allevents or shcne_interrupt),
wm_shnotify, 1, ps);
result := boolean(m_hshnotify);
finally
FreeMem(ps);
end;
end
else
// 如果出现错误就使用 cotaskmemfree函数来释放句柄
cotaskmemfree(m_pidldesktop);
end;
{$R+}
end;

function shnotify_unregister: bool;
begin
result := false;
if boolean(m_hshnotify) then
//取消系统消息监视,同时释放桌面的pidl
if boolean(shchangenotifyderegister(m_hshnotify)) then begin
{$R-}
m_hshnotify := 0;
cotaskmemfree(m_pidldesktop);
result := true;
{$R-}
end;
end;

procedure tform1.wmshellreg(var message: tmessage); //系统消息处理函数
var
strpath1, strpath2: string;
charpath: array[0..259] of char;
pidlitem: pshnotifystruct;
vPath,vFile:string;
begin
pidlitem := pshnotifystruct(message.wparam);
// 获得系统消息相关得路径
shgetpathfromidlist(pidlitem.dwitem1, charpath);
strpath1 := charpath;
shgetpathfromidlist(pidlitem.dwitem2, charpath);
strpath2 := charpath;
vPath:=ExtractFilePath(strPath1);
vFile:=ExtractFileName(strPath1);
if (message.lparam=shcne_create) and (vPath=(Label1.Caption+'\')) then
begin
// memo1.lines.add(sheventname(strpath1, strpath2, message.lparam) + chr(13) + chr(10));
if not AnsiContainsText(Memo1.Lines.Text,vFile) then
memo1.lines.add(vFile);
end;
end;


procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
//在程序退出的同时删除监视
if boolean(m_pidldesktop) then
shnotify_unregister;

end;

procedure TForm1.Button1Click(Sender: TObject);
begin
Memo1.Clear;
m_hshnotify := 0;
if shnotify_register(form1.handle) then begin //注册shell监视
showmessage('shell监视程序成功注册');
button1.enabled := false;
end
else
showmessage('shell监视程序注册失败');

end;

procedure TForm1.Button2Click(Sender: TObject);
var
i:integer;
begin
i:=Memo1.Lines.IndexOf(Memo1.SelText);
Memo1.Lines.Delete(i);
end;

end.
免责声明:本站相关技术文章信息部分来自网络,目的主要是传播更多信息,如果您认为本站的某些信息侵犯了您的版权,请与我们联系,我们会即时妥善的处理,谢谢合作!