复制任意文件或文件夹到剪贴板

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  • 开始时间 开始时间
I

import

Unregistered / Unconfirmed
GUEST, unregistred user!
uses ShlObj, ClipBrd;
procedure CopyFilesToClipboard(FileList: string);
var
DropFiles: PDropFiles;
hGlobal: THandle;
iLen: Integer;
begin
iLen := Length(FileList) + 2;
FileList := FileList + #0#0;
hGlobal := GlobalAlloc(GMEM_SHARE or GMEM_MOVEABLE or GMEM_ZEROINIT,
SizeOf(TDropFiles) + iLen);
if (hGlobal = 0) then raise Exception.Create('Could not allocate memory.');
begin
DropFiles := GlobalLock(hGlobal);
DropFiles^.pFiles := SizeOf(TDropFiles);
Move(FileList[1], (PChar(DropFiles) + SizeOf(TDropFiles))^, iLen);
GlobalUnlock(hGlobal);
Clipboard.SetAsHandle(CF_HDROP, hGlobal);
end;
end;
// Example:
procedure TForm1.Button1Click(Sender: TObject);
begin
CopyFilesToClipboard('C:.Txt'#0'C:.Bat');
end;
{
Separate the files with a #0.
}
********************************
沈前卫的回答:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls,ShlObj;
type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
const FileName:string='c:.txt';
var
DataHandle: THandle;
DataPointer: PDROPFILES;
begin
DataHandle := GlobalAlloc(GMEM_DDESHARE or GMEM_MOVEABLE,SizeOf(DROPFILES)+2+Length(FileName));
DataPointer := PDROPFILES(GlobalLock(DataHandle));
FillChar(DataPointer^,SizeOf(DROPFILES)+2+Length(FileName),0);
DataPointer.pFiles:=SizeOf(DROPFILES);
DataPointer.pt:=Point(0,0);
DataPointer.fNC:=False;
DataPointer.fWide:=False;
Move(FileName[1],Pointer(Integer(DataPointer)+SizeOf(DROPFILES))^,Length(FileName));
GlobalUnlock(DataHandle);
OpenClipboard(Form1.Handle);
EmptyClipboard;
SetClipboardData(CF_HDROP, DataHandle);
CloseClipboard;
end;
end.
***************************
在Windows的资源管理器中,选中一个或多个文件,在文件上单击鼠标右键,在弹出菜单中选复制。再切换到另外的目录,单击鼠标右键,点粘贴。就这样执行了一次文件的拷贝操作,那么Windows在拷贝过程中执行了什么操作,是否将整个文件拷贝到剪贴板上了呢?当然没有。实际上,Windows只是将一个文件结构拷贝到了剪贴版,这个结构如下:
   tDropFile+文件1文件名+vbNullChar+文件2文件名+vbNullChar……+文件N文件名+vbNullChar,其中tDropFile是一个DROPFILES结构,这个结构在Windows API中有定义。在粘贴文件时,利用API函数 DragQueryFile 就可以获得拷贝到剪贴板的文件全路径名,然后就可以根据获得的文件名执行文件拷贝函数,实现对文件的粘贴操作。
那么如何从剪切板或取复制的文件内容呢?请参看下面的例子:
/// Author:Peter Below
uses
clipbrd, shellapi;
{$R *.dfm}
 
procedure TForm1.Button1Click(Sender: TObject);
var
f: THandle;
buffer: array [0..MAX_PATH] of Char;
i, numFiles: Integer;
begin
if not Clipboard.HasFormat(CF_HDROP) then Exit;
Clipboard.Open;
try
f := Clipboard.GetAsHandle(CF_HDROP);
if f <> 0 then
begin
numFiles := DragQueryFile(f, $FFFFFFFF, nil, 0);
memo1.Clear;
for i := 0 to numfiles - 1 do
begin
buffer[0] := #0;
DragQueryFile(f, i, buffer, SizeOf(buffer));
memo1.Lines.Add(buffer);
end;
end;
finally
Clipboard.Close;
end;
end;
 
 
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