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عکس عمل بالا خارج کردن از حالت فشره
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کد:
procedure DecompressStream (aSource, aTarget: TStream) ;
var
decompStream: TDecompressionStream;
nRead: Integer;
Buffer: array [0..1023] of Char;
begin
decompStream := TDecompressionStream.Create(aSource);
try
repeat
nRead := decompStream.Read(Buffer, 1024);
aTarget.Write (Buffer, nRead);
until nRead = 0;
finally
decompStream.Free;
end;
end;
اندازه فايلي که انتخاب ميشود را بر ميگرداند
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کد:procedure TForm1.Button1Click(Sender: TObject);
var
SearchRec: TSearchRec;
begin
if OpenDialog1.Execute then
if FindFirst(OpenDialog1.FileName, faAnyFile, SearchRec) = 0 then
Label1.Caption := FloatToStrF(SearchRec.Size/1048576, ffFixed, 7, 2)+' MB';
FindClose(SearchRec);
end;
رمز کردن مطالب
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کد:
string;
var
BufS, Hexa, Hexa1, Hexa2 : string;
BufI, BufI2, Sc, Sl, Num1, Num2, Num3, Num4, Res1, Res2, Res3, Res4
: Integer;
begin
Sl := Length(Text);
Sc := 0;
BufS := '';
if (Key1 in [1 .. 120]) and (Key2 in [1 .. 120]) and (Key3 in [1 ..
120]) and (Key4 in [1 .. 120]) then
begin
BufI := Key1 * Key4;
BufI2 := Key3 * Key2;
BufI := BufI - BufI2;
if BufI = 0 then
begin
Result := '';
Exit;
end;
end
else
begin
Result := '';
Exit;
end;
repeat
Inc(Sc);
if Sc > Sl then Num1 := 0 else Num1 := Ord(Text[Sc]);
Inc(Sc);
if Sc > Sl then Num2 := 0 else Num2 := Ord(Text[Sc]);
Inc(Sc);
if Sc > Sl then Num3 := 0 else Num3 := Ord(Text[Sc]);
Inc(sc);
if Sc > Sl then Num4 := 0 else Num4 := Ord(Text[Sc]);
Res1 := Num1 * Key1;
BufI := Num2 * Key3;
Res1 := Res1 + BufI;
Res2 := Num1 * Key2;
BufI := Num2 * Key4;
Res2 := Res2 + BufI;
Res3 := Num3 * Key1;
BufI := Num4 * Key3;
Res3 := Res3 + BufI;
Res4 := Num3 * Key2;
BufI := Num4 * Key4;
Res4 := Res4 + BufI;
for BufI := 1 to 4 do
begin
case BufI of
1 : Hexa := IntToHex(Res1, 4);
2 : Hexa := IntToHex(Res2, 4);
3 : Hexa := IntToHex(Res3, 4);
4 : Hexa := IntToHex(Res4, 4);
end;
Hexa1 := '$' + Hexa[1] + Hexa[2];
Hexa2 := '$' + Hexa[3] + Hexa[4];
if (Hexa1 = '$00') and (Hexa2 = '$00') then
begin
Hexa1 := '$FF';
Hexa2 := '$FF';
end;
if Hexa1 = '$00' then Hexa1 := '$FE';
if Hexa2 = '$00' then
begin
Hexa2 := Hexa1;
Hexa1 := '$FD';
end;
BufS := BufS + Chr(StrToInt(Hexa1)) + Chr(StrToInt(Hexa2));
end;
until Sc >= Sl;
Result := BufS;
end;
رمز گشایی
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کد:
string;
var
BufS, Hexa1, Hexa2 : string;
BufI, BufI2, Divzr, Sc, Sl, Num1, Num2, Num3, Num4, Res1, Res2,
Res3, Res4 : Integer;
begin
Sl := Length(Text);
Sc := 0;
BufS := '';
if (Key1 in [1 .. 120]) and (Key2 in [1 .. 120]) and (Key3 in [1 ..
120]) and (Key4 in [1 .. 120]) then
begin
Divzr := Key1 * Key4;
BufI2 := Key3 * Key2;
Divzr := Divzr - BufI2;
if Divzr = 0 then
begin
Result := '';
Exit;
end;
end
else
begin
Result := '';
Exit;
end;
repeat
for BufI := 1 to 4 do
begin
Inc(Sc);
Hexa1 := IntToHex(Ord(Text[Sc]), 2);
Inc(Sc);
Hexa2 := IntToHex(Ord(Text[Sc]), 2);
if Hexa1 = 'FF' then
begin
Hexa1 := '00';
Hexa2 := '00';
end;
if Hexa1 = 'FE' then Hexa1 := '00';
if Hexa1 = 'FD' then
begin
Hexa1 := Hexa2;
Hexa2 := '00';
end;
case BufI of
1 : Res1 := StrToInt('$' + Hexa1 + Hexa2);
2 : Res2 := StrToInt('$' + Hexa1 + Hexa2);
3 : Res3 := StrToInt('$' + Hexa1 + Hexa2);
4 : Res4 := StrToInt('$' + Hexa1 + Hexa2);
end;
end;
BufI := Res1 * Key4;
BufI2 := Res2 * Key3;
Num1 := BufI - BufI2;
Num1 := Num1 div Divzr;
BufI := Res2 * Key1;
BufI2 := Res1 * Key2;
Num2 := BufI - BufI2;
Num2 := Num2 div Divzr;
BufI := Res3 * Key4;
BufI2 := Res4 * Key3;
Num3 := BufI - BufI2;
Num3 := Num3 div Divzr;
BufI := Res4 * Key1;
BufI2 := Res3 * Key2;
Num4 := BufI - BufI2;
Num4 := Num4 div Divzr;
BufS := BufS + Chr(Num1) + Chr(Num2) + Chr(Num3) + Chr(Num4);
until Sc >= Sl;
Result := BufS;
end;
از کارانداختيCTRL+C و CTRL +V در memo*
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کد:
procedure TForm1.Memo1KeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
begin
if ((Key = ord('V')) and (ssCtrl in Shift)) then begin
if Clipboard.HasFormat(CF_TEXT) then ClipBoard.Clear;
key := 0;
end;
if ((Key = ord('C')) and (ssCtrl in Shift)) then begin
if Clipboard.HasFormat(CF_TEXT) then ClipBoard.Clear;
key := 0;
end;
end;
ذخیره عکس در اکسس
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کد:
var
BlobStream: TStream;
JPEGImage: TJPegImage;
Ext: string;
begin
if (Field = nil) or (Field = ADOTable1Image) then begin
if ADOTable1Imagetype.AsString <> '' then begin
BlobStream := ADOTable1.CreateBlobStream(adotable1Image,
bmRead);
try
Ext := UpperCase(adotable1ImageType.AsString);
if Ext = '.BMP' then
Image1.Picture.Bitmap.LoadFromStream(BlobStream)
else if Ext = '.JPG' then begin
JPEGImage := TJPEGImage.Create;
try
JPEGImage.LoadFromStream(BlobStream);
Image1.Picture.Assign(JPEGImage);
finally
JPEGImage.Free;
end;
end;
finally
BlobStream.Free;
end;
end else
Image1.Picture := nil;
end;
end;
if OpenPictureDialog1.Execute then begin
ADOTable1.Edit;
adotable1ImageType.AsString :=
ExtractFileExt(OpenPictureDialog1.FileName);
adotable1Image.LoadFromFile(OpenPictureDialog1.Fil eName);
end;
عکس ذخیره شده در اکسس را روی هارد ذخیره کنید
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کد:if SaveDialog1.Execute then
adotable1Attachment.SaveToFile(SaveDialog1.FileNam e);
به چرخش در آوردن متن
***********************کد:procedure AngleTextOut(Acanvas:Tcanvas;Angle,x,y:integer;Str :String);
var
LogRec:TLogFont;
OldFontHandle,
NewFontHandle:Hfont;
begin
GetObject(Acanvas.Font.Handle,SizeOf(LogRec),Addr( LogRec));
LogRec.lfEscapement:=Angle*10;
NewFontHandle:=CreateFontIndirect(logRec);
OldFontHandle:=SelectObject(Acanvas.handle,NewFont Handle);
ACanvas.TextOut(x,y,Str);
NewFontHandle:=SelectObject(Acanvas.handle,OldFont Handle);
DeleteObject(NewFontHandle);
end;
نحوه استفاده بررسي خالي بودن کنترل TImage
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کد:if Image1.Picture.Graphic.Empty then
begin
...
end;