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| unit dbimage;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, Mask, DBCtrls, ExtCtrls, DB, DBTables, Buttons;
type
TForm1 = class(TForm)
DBNavigator1: TDBNavigator;
Table1: TTable;
DataSource1: TDataSource;
Table1Student_Id: TAutoIncField;
Table1Student_First_name: TStringField;
Table1Student_Name: TStringField;
Table1Student_Picture: TBlobField;
SpeedButton1: TSpeedButton;
Label1: TLabel;
Label4: TLabel;
DBEdit1: TDBEdit;
Label2: TLabel;
DBEdit2: TDBEdit;
DBText1: TDBText;
Panel1: TPanel;
Image1: TImage;
procedure FormCreate(Sender: TObject);
procedure DBNavigator1Click(Sender: TObject; Button: TNavigateBtn);
procedure SpeedButton1Click(Sender: TObject);
procedure Table1AfterScroll(DataSet: TDataSet);
private
{ Déclarations privées }
public
{ Déclarations publiques }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses jpeg;
const
TABLE_NAME = 'Students.db';
procedure LoadJPG(const Stream:TStream;AOut:TBitmap);
var
ImJPEG : TJPEGImage;
begin
if not Assigned(Aout) then Exit;
if not Assigned(Stream) then Exit;
ImJPEG := TJPEGImage.Create;
try
ImJPEG.LoadFromStream(Stream);
AOut.Assign(ImJPEG);
finally
ImJPEG.Free();
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
with Table1 do
begin
TableType := ttParadox;
TableName := TABLE_NAME;
if not Exists then
begin
with FieldDefs do
begin
Clear;
with AddFieldDef do begin
Name := 'Student_Id';
DataType := ftAutoInc;
Required := True;
end;
with AddFieldDef do begin
Name := 'Student_First_name';
DataType := ftString;
Required := True;
end;
with AddFieldDef do begin
Name := 'Student_Name';
DataType := ftString;
Required := True;
end;
with AddFieldDef do begin
Name := 'Student_Picture';
DataType := ftBlob;
end;
end;
CreateTable;
end;
Open;
end;
end;
procedure TForm1.DBNavigator1Click(Sender: TObject; Button: TNavigateBtn);
begin
SpeedButton1.Enabled:=Table1.State in[dsEdit,dsInsert];
end;
procedure TForm1.SpeedButton1Click(Sender: TObject);
var
S:string;
begin
if PromptForfilename(S,'Images jpg|*.jpg','','Choisir une image') then
begin
Table1Student_Picture.LoadFromFile(S);
end;
end;
procedure TForm1.Table1AfterScroll(DataSet: TDataSet);
var
Stream : TStream;
begin
with Table1 do
Stream := CreateBlobStream(Table1Student_Picture, bmRead);
Stream.Position:=0;
Image1.Picture.Graphic := nil;
try
try
LoadJPG(Stream,Image1.Picture.Bitmap);
except
end;
finally
Stream.Free;
end;
end;
end. |
Partager