tool/Unit1.pas

   1 unit Unit1;
   2
   3 interface
   4
   5 uses
   6   System.SysUtils, System.Types, System.UITypes, System.Classes,
   7   System.Variants,
   8   FMX.Types, FMX.Controls, FMX.Forms, FMX.Dialogs, FMX.Ani, FMX.Layouts,
   9   FMX.Gestures, FMX.Graphics, FMX.Surfaces,
  10   FireDAC.Stan.Intf, FireDAC.Stan.Option, FireDAC.Stan.Param,
  11   FireDAC.Stan.Error, FireDAC.DatS, FireDAC.Phys.Intf, FireDAC.DApt.Intf,
  12   FireDAC.Stan.Async, FireDAC.DApt, FireDAC.UI.Intf, FireDAC.Stan.Def,
  13   FireDAC.Stan.Pool, FireDAC.Phys, FireDAC.Phys.MySQL, FireDAC.Phys.MySQLDef,
  14   Data.Bind.Controls, Data.Bind.EngExt, FMX.Bind.DBEngExt, System.Rtti,
  15   System.Bindings.Outputs, FMX.Bind.Editors, Data.Bind.Components, Data.DB,
  16   FMX.Controls.Presentation, FMX.Edit, FMX.Bind.Navigator, Data.Bind.DBScope,
  17   FireDAC.Comp.Client, FireDAC.Comp.DataSet, FMX.Objects, FMX.StdCtrls,
  18   FireDAC.FMXUI.Wait, FireDAC.Comp.UI;
  19
  20 type
  21   TForm2 = class(TForm)
  22     Image1: TImage;
  23     FDTable1: TFDTable;
  24     FDConnection1: TFDConnection;
  25     Edit1: TEdit;
  26     BindingsList1: TBindingsList;
  27     FDGUIxWaitCursor1: TFDGUIxWaitCursor;
  28     BindSourceDB1: TBindSourceDB;
  29     NavigatorBindSourceDB12: TBindNavigator;
  30     LinkControlToField1: TLinkControlToField;
  31     Button1: TButton;
  32     OpenDialog1: TOpenDialog;
  33     Label1: TLabel;
  34     LinkPropertyToFieldText: TLinkPropertyToField;
  35     LinkPropertyToFieldBitmap: TLinkPropertyToField;
  36     FDQuery1: TFDQuery;
  37     Button2: TButton;
  38     procedure Button1Click(Sender: TObject);
  39     procedure FormCreate(Sender: TObject);
  40     procedure Button2Click(Sender: TObject);
  41   private
  42     { private \90é\8c¾ }
  43     procedure streamToField(stream, field: TStream);
  44   public
  45     { public \90é\8c¾ }
  46   end;
  47
  48 var
  49   Form2: TForm2;
  50
  51 implementation
  52
  53 {$R *.fmx}
  54
  55 procedure TForm2.Button1Click(Sender: TObject);
  56 var
  57   s: TStream;
  58   t: TMemoryStream;
  59 begin
  60   if OpenDialog1.Execute = true then
  61   begin
  62     FDTable1.Edit;
  63     s := FDTable1.CreateBlobStream(FDTable1.FieldByName('source'), bmWrite);
  64     t := TMemoryStream.Create;
  65     try
  66       t.LoadFromFile(OpenDialog1.FileName);
  67       streamToField(t, s);
  68       FDTable1.Post;
  69     finally
  70       s.Free;
  71       t.Free;
  72     end;
  73   end;
  74 end;
  75
  76 procedure TForm2.Button2Click(Sender: TObject);
  77 begin
  78   with FDQuery1.SQL do
  79   begin
  80     Clear;
  81     Add('drop table images;');
  82     Add('create table images(id int primary key, name varchar(10), source mediumblob);');
  83   end;
  84   FormCreate(Sender);
  85 end;
  86
  87 procedure TForm2.FormCreate(Sender: TObject);
  88 var
  89   i: Integer;
  90   s, t: TStream;
  91 begin
  92   FDQuery1.ExecSQL;
  93   FDTable1.Open;
  94   if FDTable1.RecordCount = 0 then
  95   begin
  96     for i := 1 to 50 do
  97       FDTable1.AppendRecord([i, Format('slide%d.jpg', [i]), nil]);
  98     FDTable1.First;
  99     for i := 1 to 10 do
 100     begin
 101       FDTable1.Edit;
 102       s := FDTable1.CreateBlobStream(FDTable1.FieldByName('source'), bmWrite);
 103       t := TResourceStream.Create(HInstance, Format('Resource_%d', [i]),
 104         RT_RCDATA);
 105       try
 106         streamToField(t,s);
 107         FDTable1.Post;
 108       finally
 109         s.Free;
 110       end;
 111       FDTable1.Next;
 112     end;
 113   end;
 114   FDTable1.First;
 115 end;
 116
 117 procedure TForm2.streamToField(stream, field: TStream);
 118 var
 119   bmp: TBitmapSurface;
 120   pm: TBitmapCodecSaveParams;
 121   img: TBitmap;
 122 begin
 123   pm.Quality := 100;
 124   bmp := TBitmapSurface.Create;
 125   img:=TBitmap.Create;
 126   try
 127     img.LoadFromStream(stream);
 128     bmp.Assign(img);
 129     TBitmapCodecManager.SaveToStream(field, bmp, '.jpg', @pm);
 130   finally
 131     bmp.Free;
 132     img.Free;
 133   end;
 134 end;
 135
 136 end.