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| unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ComCtrls, StdCtrls;
type
TProgressFileStream = class(TFileStream)
private
FOnProgress: TNotifyEvent;
public
function Read(var Buffer; Count: Longint): Longint; override;
//function Read(var Buffer: TBytes; Count: Longint): Longint; override;
property OnProgress: TNotifyEvent read FOnProgress write FOnProgress;
end;
TForm1 = class(TForm)
Button1: TButton;
ProgressBar1: TProgressBar;
procedure Button1Click(Sender: TObject);
private
MonFichier : TProgressFileStream;
public
procedure GestionProgressBar(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
{ TProgressFileStream }
function TProgressFileStream.Read(var Buffer; Count: Integer): Longint;
begin
result := inherited Read(Buffer, Count);
if Assigned(FOnProgress) then
FOnProgress(Self);
end;
{ TForm1 }
procedure TForm1.GestionProgressBar(Sender: TObject);
begin
// traitement de ma barre
ProgressBar1.Position := MonFichier.Position;
end;
procedure TForm1.Button1Click(Sender: TObject);
var buffer :array[1..2000] of Byte;
begin
MonFichier := TProgressFileStream.Create('C:\Archivage\DisqueF.zip', fmOpenRead or fmShareDenyWrite);
try
MonFichier.OnProgress := GestionProgressBar;
ProgressBar1.Max := MonFichier.Size;
// Remplacer la boucle While ci dessous par l'appel de la fonction de calculMD5 en passant MonFichier en paramètre
while MonFichier.Position < MonFichier.size do
begin
MonFichier.Read(Buffer, sizeof(Buffer));
end;
finally
MonFichier.Free;
end;
end;
end. |
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